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Biryukov YP, Zinnatullin AL, Levashova IO, Shablinskii AP, Bubnova RS, Vagizov FG, Ugolkov VL, Filatov SK, Pekov IV. Crystal structure refinement, low- and high-temperature X-ray diffraction and Mössbauer spectroscopy study of the oxoborate ludwigite from the Iten'yurginskoe deposit. ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2023; 79:368-379. [PMID: 37669151 DOI: 10.1107/s2052520623006455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 07/25/2023] [Indexed: 09/07/2023]
Abstract
This paper reports an investigation of the chemistry, crystal structure refinement and thermal behavior (80-1650 K) of ludwigite from the Iten'yurginskoe deposit (Eastern Chukotka, Russia). Its chemical composition was determined by electron microprobe analysis, giving an empirical formula (Mg1.70Fe2+0.29Mn0.01)Σ2.00(Fe3+0.90Al0.08Mg0.02)Σ1.00O2(BO3). A refinement of the crystal structure from single-crystal X-ray diffraction data (SCXRD) was provided for the first time for ludwigite from this deposit (R = 0.047). The structure can be described as a framework composed of [MO6]n- octahedra and isolated [BO3]3- triangles located in triangular interstices of the framework. Based on a comprehensive analysis of SCXRD and Mössbauer spectroscopy data, the M1 site is occupied by Mg, M2 and M3 by Mg and Fe2+, M4 by Fe3+, Mg and Al. There are also oxo-centered [O4M4]n+ and [O2M5]n+ polyhedra building up a framework with the [BO3]3- triangles located in its hexagonal interstices. No indications of magnetic ordering are found in the temperature range investigated. The Fe2+ → Fe3+ oxidation occurs above 600 K, and is accompanied by a decrease of the unit-cell parameters and subsequent incomplete solid-phase decomposition with the formation of hematite, warwickite and magnetite. The mineral melts at temperatures above 1582 K. The thermal expansion of ludwigite is slightly anisotropic, which is explained by a dense packing of the [MO6]n- octahedra as well as a virtually perpendicular orientation of the oxo-centered double chains to each other. At room temperature, maximum expansion is along the c axis (αc = 9.1 × 10-6 K-1) and minimum expansion is in the ab plane (αa = 8.6 × 10-6, αb = 7.6 × 10-6 K-1), which is due to the preferred orientation of the [BO3]3- triangles. A comparison of the thermal behavior of three oxoborates of the ludwigite group, namely azoproite (Mg,Fe2+)2(Fe3+,Ti,Mg,Al)O2(BO3), vonsenite (Fe2+,Mg)2(Fe3+,Mn2+,Sn,Al)O2(BO3) and ludwigite (Mg,Fe2+,Mn)2(Fe3+,Al,Mg)O2(BO3), is provided.
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Affiliation(s)
- Yaroslav P Biryukov
- Institute of Silicate Chemistry of the Russian Academy of Sciences (ISC RAS), Makarova Emb., 2, Saint Petersburg, 199034, Russian Federation
| | - Almaz L Zinnatullin
- Institute of Physics, Kazan Federal University, Kremlyovskaya Str., 18, Kazan, 420008, Russian Federation
| | - Irina O Levashova
- Institute of Silicate Chemistry of the Russian Academy of Sciences (ISC RAS), Makarova Emb., 2, Saint Petersburg, 199034, Russian Federation
| | - Andrey P Shablinskii
- Institute of Silicate Chemistry of the Russian Academy of Sciences (ISC RAS), Makarova Emb., 2, Saint Petersburg, 199034, Russian Federation
| | - Rimma S Bubnova
- Institute of Silicate Chemistry of the Russian Academy of Sciences (ISC RAS), Makarova Emb., 2, Saint Petersburg, 199034, Russian Federation
| | - Farit G Vagizov
- Institute of Physics, Kazan Federal University, Kremlyovskaya Str., 18, Kazan, 420008, Russian Federation
| | - Valery L Ugolkov
- Institute of Silicate Chemistry of the Russian Academy of Sciences (ISC RAS), Makarova Emb., 2, Saint Petersburg, 199034, Russian Federation
| | - Stanislav K Filatov
- Institute of Earth Sciences, Department of Crystallography, Saint Petersburg State University, Universitetskaya Emb., 7/9, Saint Petersburg, 199034, Russian Federation
| | - Igor V Pekov
- Faculty of Geology, Moscow State University, Leninskie Gory, 1, Moscow, 119991, Russian Federation
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Biryukov YP, Zinnatullin AL, Bubnova RS, Vagizov FG, Shablinskii AP, Filatov SK, Shilovskikh VV, Pekov IV. Investigation of thermal behavior of mixed-valent iron borates vonsenite and hulsite containing [OM 4] n+ and [OM 5] n+ oxocentred polyhedra by in situ high-temperature Mössbauer spectroscopy, X-ray diffraction and thermal analysis. ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2020; 76:543-553. [PMID: 32831273 DOI: 10.1107/s2052520620006538] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 05/15/2020] [Indexed: 06/11/2023]
Abstract
The investigation of elemental composition, crystal structure and thermal behavior of vonsenite and hulsite from the Titovskoe boron deposit in Russia is reported. The structures of the borates are described in terms of cation-centered and oxocentred polyhedra. There are different sequences of double chains and layers consisting of oxocentred [OM4]n+ tetrahedra and [OM5]n+ tetragonal pyramids forming a framework. Elemental composition was determined by energy-dispersive X-ray spectroscopy (EDX). Oxidation states and coordination sites of iron and tin in the oxoborates are determined using Mössbauer spectroscopy and compared with EDX and X-ray diffraction data (XRD). According to results obtained from high-temperature Mössbauer spectroscopy, the Fe2+ to Fe3+ oxidation in vonsenite and hulsite occurs at approximately 500 and 600 K, respectively. According to the high-temperature XRD data, this process is accompanied by an assumed deformation of crystal structures and subsequent solid-phase decomposition to hematite and warwickite. It is seen as a monotonic decrease of volume thermal expansion coefficients with an increase in temperature. A partial magnetic ordering in hulsite is observed for the first time with Tc ≃ 383 K. Near this temperature, an unusual change of thermal expansion coefficients is revealed. Vonsenite starts to melt at 1571 K and hulsite melts at 1504 K. Eigenvalues of thermal expansion tensor are calculated for the oxoborates as well as anisotropy of the expansion is described in comparison with their crystal structures.
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Affiliation(s)
- Yaroslav P Biryukov
- Institute of Silicate Chemistry of the Russian Academy of Sciences, Makarova emb., 2, Saint Petersburg, 199034, Russian Federation
| | - Almaz L Zinnatullin
- Kazan Federal University, Kremlyovskaya Str., 18, Kazan, 420008, Russian Federation
| | - Rimma S Bubnova
- Institute of Silicate Chemistry of the Russian Academy of Sciences, Makarova emb., 2, Saint Petersburg, 199034, Russian Federation
| | - Farit G Vagizov
- Kazan Federal University, Kremlyovskaya Str., 18, Kazan, 420008, Russian Federation
| | - Andrey P Shablinskii
- Institute of Silicate Chemistry of the Russian Academy of Sciences, Makarova emb., 2, Saint Petersburg, 199034, Russian Federation
| | - Stanislav K Filatov
- Institute of Earth Sciences, Department of Crystallography, Saint Petersburg State University, Universitetskaya Emb., 7/9, Saint Petersburg, 199034, Russian Federation
| | - Vladimir V Shilovskikh
- Geomodel Resource Centre, Saint Petersburg State University, Ulyanovskaya Str., 1, Saint Petersburg, 198510, Russian Federation
| | - Igor V Pekov
- Faculty of Geology, Moscow State University, Leninskie Gory, 1, Moscow, 119991, Russian Federation
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Leonyuk NI, Maltsev VV, Volkova EA. Crystal Chemistry of High-Temperature Borates. Molecules 2020; 25:molecules25102450. [PMID: 32466152 PMCID: PMC7287881 DOI: 10.3390/molecules25102450] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 05/12/2020] [Accepted: 05/22/2020] [Indexed: 11/16/2022] Open
Abstract
In recent years borate-based crystals has attracted substantial interest among the research community. The overall importance of this family of materials is reflected in miscellaneous articles and several reviews that have been published over the years. Crystalline borate materials exhibit numerous interesting physical properties, which make them promising for further practical applications. Diversity of functional characteristics results from their high structural flexibility caused in the linkage of planar/non-planar BO3 groups and BO4 tetrahedra, which can occur as isolated or condensed structural units. This report is a brief review on crystal chemistry and structure features of anhydrous/high-temperature borates. Polymorphism of boron-oxygen radicals has been considered basing on cations' nature and synthesis conditions. Analysis of the laws governing borates structures and general principles of their systematics was discussed. As a result, an alternative classification of anhydrous compounds has been considered. It is based on four orders of their subdivision: (1) by the variety of anion formers, (2) by the cation charge, (3) by the N = NM:NB, i.e., ratio of metal atoms number to the ratio of boron atoms number (N-factor) value indicating the borate structural type (if it is known), (4) by the cation type and size.
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Moshkina E, Ritter C, Eremin E, Sofronova S, Kartashev A, Dubrovskiy A, Bezmaternykh L. Magnetic structure of Cu 2MnBO 5 ludwigite: thermodynamic, magnetic properties and neutron diffraction study. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2017; 29:245801. [PMID: 28452744 DOI: 10.1088/1361-648x/aa7020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We report on the thermodynamic, magnetic properties and the magnetic structure of ludwigite-type Cu2MnBO5. The specific heat, low-field magnetization and paramagnetic susceptibility were studied on a single crystal and combined with powder neutron diffraction data. The temperature dependence of the specific heat and the neutron diffraction pattern reveal a single magnetic phase transition at T = 92 K, which corresponds to the magnetic ordering into a ferrimagnetic phase. The cation distribution and the values and directions of magnetic moments of ions in different crystallographic sites are established. The magnetic moments of Cu2+ and Mn3+ ions occupying different magnetic sites in the ferrimagnetic phase are pairwise antiparallel and their directions do not coincide with the directions of the principal crystallographic axes. The small value of the magnetic moment of copper ions occupying site 2a is indicative of partial disordering of the magnetic moments on this site. The magnetization measurements show a strong temperature hysteresis of magnetization, which evidences for field-dependent transitions below the phase transition temperature.
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Affiliation(s)
- Evgeniya Moshkina
- Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia. Siberian State Aerospace University, Krasnoyarsk 660037, Russia
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Sofronova S, Nazarenko I. Ludwigites: From natural mineral to modern solid solutions. CRYSTAL RESEARCH AND TECHNOLOGY 2017. [DOI: 10.1002/crat.201600338] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- S. Sofronova
- L.V. Kirensky Institute of Physics; Siberian Branch of Russian Academy of Science; 660036 Krasnoyarsk Russia
| | - I. Nazarenko
- L.V. Kirensky Institute of Physics; Siberian Branch of Russian Academy of Science; 660036 Krasnoyarsk Russia
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Martin C, Maignan A, Guesdon A, Lainé F, Lebedev OI. Topochemical Approach for Transition-Metal Exchange Assisted by Copper Extrusion: from Cu 2FeBO 5 to Fe 3BO 5. Inorg Chem 2017; 56:2375-2378. [PMID: 28211694 DOI: 10.1021/acs.inorgchem.6b03101] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
All fields of today's technology are concerned with multifunctional materials, the subject of constantly expanding research. Among them, metal transition oxides occupy a strategic place because of the properties directly correlated with metal valence linked with oxygen stoichiometry. To enhance or induce new properties, knowledge of the relationships between the structural and physical characteristics is of prime importance, but a design at low scale also appears to be a powerful tool to increase the chemical reactivity and stabilize new compounds. Herein, an unexpected reaction is reported that associates the exchange of copper and iron in a 3D ludwigite lattice with the huge release of oxygen (14% by weight) at moderate temperature (<450 °C). Annealing of Cu2FeBO5 in a reducing atmosphere leads to the extrusion of copper and the formation of Fe3BO5, the micro/nanostructural state of which facilitates the partial Cu2FeBO5 recovery associated with the capture of oxygen in oxidizing conditions.
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Affiliation(s)
- Christine Martin
- CRISMAT, UMR 6508, ENSICAEN , 6 Bd Ml Juin, 14040 Caen Cedex, France
| | - Antoine Maignan
- CRISMAT, UMR 6508, ENSICAEN , 6 Bd Ml Juin, 14040 Caen Cedex, France
| | - Anne Guesdon
- CRISMAT, UMR 6508, ENSICAEN , 6 Bd Ml Juin, 14040 Caen Cedex, France
| | - Fabien Lainé
- CRISMAT, UMR 6508, ENSICAEN , 6 Bd Ml Juin, 14040 Caen Cedex, France
| | - Oleg I Lebedev
- CRISMAT, UMR 6508, ENSICAEN , 6 Bd Ml Juin, 14040 Caen Cedex, France
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Maignan A, Lainé F, Guesdon A, Malo S, Damay F, Martin C. Charge ordering and multiferroicity in Fe3BO5 and Fe2MnBO5 oxyborates. J SOLID STATE CHEM 2017. [DOI: 10.1016/j.jssc.2016.11.034] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Kurayoshi Y, Hara S, Sato H, Frandsen C, Mørup S, Rasmussen HK, Nakamura S. Crystal structure and magnetism of Fe2(OH)[B2O4(OH)]. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2014; 26:266002. [PMID: 24903647 DOI: 10.1088/0953-8984/26/26/266002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The structure and magnetism of Fe2(OH)[B2O4(OH)] are reported. Powder x-ray diffraction reveals a characteristic structure containing two crystallographically independent zigzag-ladder chains of magnetic Fe(2+) ions. Magnetization measurements reveal a phase transition at 85 K, below which a weak spontaneous magnetization (≈ 0.15 μB/Fe) appears. Below 85 K, magnetization increases with decreasing temperature down to 70 K, below which it decreases and approaches a constant value at low temperature. The Mössbauer spectrum at room temperature is composed of two paramagnetic doublets corresponding to the two crystallographic Fe(2+) sites. Below 85 K, each doublet undergoes further splitting because of the magnetic hyperfine fields. The temperature dependence of the hyperfine field is qualitatively different for the two distinguishable Fe(2+) sites. This is responsible for the anomalous temperature dependence of the magnetization.
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Affiliation(s)
- Yotaro Kurayoshi
- Department of Physics, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
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Uyeda S, Fuller MD, Belshé JC, Girdler RW. Anisotropy of magnetic susceptibility of rocks and minerals. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/jz068i001p00279] [Citation(s) in RCA: 208] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Girgsdies F, Behrens M. On the structural relations of malachite. II. The brochantite MDO polytypes. ACTA CRYSTALLOGRAPHICA SECTION B: STRUCTURAL SCIENCE 2012; 68:571-7. [DOI: 10.1107/s0108768112039274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2012] [Accepted: 09/14/2012] [Indexed: 11/10/2022]
Abstract
The structural relation between malachite and the brochantite MDO (maximum degree of order) polytypes is discussed. It is demonstrated that the same building blocks which form the basis of brochantite polytypism also occur in malachite. The different arrangements of these building blocks in the two mineral structures are rationalized as a result of the different coordination geometries required by the respective non-metal atoms acting as linkers. The compound stoichiometries are discussed in light of a common structured formula scheme, in which pairs of H atoms can play a similar role as single non-H atoms. An overview on the occurrence of malachite-like building blocks in several other crystal structures is given.
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Kawano T, Yamane H. Mg5TiO4(BO3)2. Acta Crystallogr C 2010; 66:i92-4. [PMID: 20921599 DOI: 10.1107/s0108270110036577] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2010] [Accepted: 09/13/2010] [Indexed: 11/10/2022] Open
Abstract
Single crystals of pentamagnesium titanium(IV) tetraoxide bis(borate), Mg(5)TiO(4)(BO(3))(2), were prepared by slow cooling of the melt from 1623 K in air. The crystal is isostructural with the mineral ludwigite (Mg(2)FeO(2)BO(3)). The Mg and Ti atoms are coordinated by six O atoms and the B atom is coordinated by three O atoms. There are three Mg sites and one mixed site statistically occupied by Mg and Ti atoms. Atoms are at the following special positions: 2a (0, 0, 0) and 2d (0, 1/2, 1/2) for two Mg atoms, 4g (x, y, 0) for the mixed Ti/Mg site and the BO(3) group, and 4h (x, y, 1/2) for a third Mg and two oxide O atoms. MgO(6) and (Ti/Mg)O(6) octahedra are connected by sharing of edges to form zigzag folding layers along the c axis. Triangular prismatic tunnels are formed between the folding layers by sharing apical O atoms of the MgO(6) and (Ti/Mg)O(6) octahedra.
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Affiliation(s)
- Tetsuya Kawano
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
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Abstract
AbstractsSystematics and description of polyions of both linked cation- and anion-centered polyhedra with face-, edge-, and corner-sharing are discussed. Some additions to the system introduced by Liebau (1985) for cation-centered polyions are proposed which take into account the property of linking. The concept of linkedness of the polyion,ML, and the scheme of its determination are offered. A new rule of selection of fundamental chains for layers and frameworks is proposed which also considers the property of linking. For the description of topological properties of polyhedra in the polyion a diagram of connectedness (on the base of Schlegel diagrams) and a formula of connectedness are used. For the distinction of polyhedra in the polyion the concept of topological equivalence by Wells (1970) is used and the concept of configurational equivalence is proposed. Some examples of polyions composed of anion-centered tetrahedra and polyions composed of cation-centered tetrahedra are given.
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Krivovichev SV, Filatov SK, Semenova TF. Types of cationic complexes based on oxocentred tetrahedra [OM4] in the crystal structures of inorganic compounds. RUSSIAN CHEMICAL REVIEWS 2007. [DOI: 10.1070/rc1998v067n02abeh000287] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Continentino MA, Fernandes JC, Guimaräes RB, Boechat B, Borges HA, Valarelli JV, Haanappel E, Lacerda A, Silva PRJ. Strongly disordered Heisenberg spin-1 chains: Vanadium warwickites. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/13642819608239137] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- M. A. Continentino
- a Institute de Fisica , Universidade Federal Fluminense , Avenida Litoranea s/n, Niteroi , 24210-340 RJ , Brazil
| | - J. C. Fernandes
- a Institute de Fisica , Universidade Federal Fluminense , Avenida Litoranea s/n, Niteroi , 24210-340 RJ , Brazil
| | - R. B. Guimaräes
- a Institute de Fisica , Universidade Federal Fluminense , Avenida Litoranea s/n, Niteroi , 24210-340 RJ , Brazil
| | - B. Boechat
- a Institute de Fisica , Universidade Federal Fluminense , Avenida Litoranea s/n, Niteroi , 24210-340 RJ , Brazil
| | - H. A. Borges
- b Departamento de Fisica , PUC-RJ, M. de S. Vicente 225 , Rio de Janeiro , 22.452 , RJ , Brazil
| | - J. V. Valarelli
- c Institute de Geociencias , Universidade de Sao Paulo , Caixa Postal 20.899, São Paulo , 01498-970 , SP , Brazil
| | - E. Haanappel
- d National High Magnetic Field Laboratory , Los Alamos , New Mexico , 87545 , USA
| | - Alex Lacerda
- d National High Magnetic Field Laboratory , Los Alamos , New Mexico , 87545 , USA
| | - P. R. J. Silva
- e Centre Brasileiro de Pesquisas Fisicas , Rua Dr Xavier Sigaud 150 , Rio de Janeiro , 22.290 , RJ , Brazil
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Brovkin AA, Rozhdestvenskaya IV, Rykova EA. Cation distribution in the structure of titanium-containing ludwigite. CRYSTALLOGR REP+ 2002. [DOI: 10.1134/1.1481926] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Onoda M. Crystal Structure and Electronic State of the DisorderedS=1 System (LixV1−x)3BO5withx≃0.3. J SOLID STATE CHEM 1998. [DOI: 10.1006/jssc.1998.7965] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Fernandes JC, Guimarães RB, Continentino MA, Borges HA, Valarelli JV, Lacerda A. Titanium-III warwickites: A family of one-dimensional disordered magnetic systems. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:16754-16757. [PMID: 9976069 DOI: 10.1103/physrevb.50.16754] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Schaefer J, Bluhm K. Synthese und Kristallstruktur von Cu9Ti2[B2O5]2[BO3]2O6 ? ein Kupfertitanboratpyroboratoxid? Z Anorg Allg Chem 1994. [DOI: 10.1002/zaac.19946200915] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Schaefer J, Bluhm K. Ein neues Kupferzinnboratoxid mit isolierten BO3-Baugruppen: Cu5Sn(BO3)2O4. Z Anorg Allg Chem 1994. [DOI: 10.1002/zaac.19946200914] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Schaefer J, Bluhm K. Ein neues Kupfercobaltboratoxid mit isolierten B2O5-Baugruppen: Cu2Co(B2O5)O. Z Anorg Allg Chem 1994. [DOI: 10.1002/zaac.19946200618] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Cooper J, Tilley R. An electron microscope and X-ray diffraction study of some synthetic (Mg,Mn)3BO5 oxyborates. J SOLID STATE CHEM 1992. [DOI: 10.1016/0022-4596(92)90055-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Cooper J, Tilley R. Structural transformations in some oxyborates observed by high resolution transmission electron microscopy. J SOLID STATE CHEM 1991. [DOI: 10.1016/0022-4596(91)90389-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Bluhm K, M�ller-Buschbaum HK. Ein synthetischer Warwickit mit statistischer Metallverteilung: NiScBO4. Z Anorg Allg Chem 1990. [DOI: 10.1002/zaac.19905850111] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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The synthesis and crystal structures of the related series of aluminoborates: Co2.1Al0.9BO5, Ni2AlBO5, and Cu2AlBO5. J SOLID STATE CHEM 1990. [DOI: 10.1016/0022-4596(90)90327-t] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Structural investigation of two synthetic oxyborates: The mixed magnesium-manganese and the pure cobalt ludwigites, Mg1.93(2)Mn1.07(2)O2BO3and Co3O2BO3. ACTA ACUST UNITED AC 1989. [DOI: 10.1524/zkri.1989.189.1-2.33] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Norrestam R. Structural investigation of two synthetic warwickites: Undistorted orthorhombic MgScOBO3and distorted monoclinic Mg0.76Mn1.24OBO3. ACTA ACUST UNITED AC 1989. [DOI: 10.1524/zkri.1989.189.1-2.1] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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