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Diaz-Anichtchenko D, Aviles-Coronado JE, López-Moreno S, Turnbull R, Manjón FJ, Popescu C, Errandonea D. Electronic, Vibrational, and Structural Properties of the Natural Mineral Ferberite (FeWO 4): A High-Pressure Study. Inorg Chem 2024; 63:6898-6908. [PMID: 38554090 PMCID: PMC11022173 DOI: 10.1021/acs.inorgchem.4c00345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 03/08/2024] [Accepted: 03/12/2024] [Indexed: 04/01/2024]
Abstract
This paper reports an experimental high-pressure study of natural mineral ferberite (FeWO4) up to 20 GPa using diamond-anvil cells. First-principles calculations have been used to support and complement the results of the experimental techniques. X-ray diffraction patterns show that FeWO4 crystallizes in the wolframite structure at ambient pressure and is stable over a wide pressure range, as is the case for other wolframite AWO4 (A = Mg, Mn, Co, Ni, Zn, or Cd) compounds. No structural phase transitions were observed for FeWO4, in the pressure range investigated. The bulk modulus (B0 = 136(3) GPa) obtained from the equation of state is very close to the recently reported value for CoWO4 (131(3) GPa). According to our optical absorption measurements, FeWO4 has an indirect band gap that decreases from 2.00(5) eV at ambient pressure to 1.56(5) eV at 16 GPa. First-principles simulations yield three infrared-active phonons, which soften with pressure, in contrast to the Raman-active phonons. These results agree with Raman spectroscopy experiments on FeWO4 and are similar to those previously reported for MgWO4. Our results on FeWO4 are also compared to previous results on other wolframite-type compounds.
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Affiliation(s)
- Daniel Diaz-Anichtchenko
- Departamento
de Física Aplicada-ICMUV, MALTA Consolider Team, Universidad de Valencia, Dr. Moliner 50, Burjassot, 46100 Valencia, Spain
| | - Jesus E. Aviles-Coronado
- División
de Materiales Avanzados, IPICYT, Camino a la Presa de San José
2055 Col. Lomas 4a sección, San Luis
Potosi 78216, Mexico
| | - Sinhué López-Moreno
- CONAHCYT—División
de Materiales Avanzados, IPICYT, Camino a la Presa de San José
2055 Col. Lomas 4a sección, San Luis
Potosi 78216, Mexico
- Grupo
de Ciencia e Ingeniería Computacionales—Centro Nacional
de Supercómputo, IPICYT, Camino a la Presa de San José
2055 Col. Lomas 4a sección, San Luis
Potosi 78216, Mexico
| | - Robin Turnbull
- Departamento
de Física Aplicada-ICMUV, MALTA Consolider Team, Universidad de Valencia, Dr. Moliner 50, Burjassot, 46100 Valencia, Spain
| | - Francisco J. Manjón
- Instituto
de Diseño para la Fabricación y Producción Automatizada,
MALTA Consolider Team, Universitat Politècnica
de València, Camí
de Vera s/n, 46022 València, Spain
| | - Catalin Popescu
- CELLS-ALBA
Synchrotron Light Facility, Cerdanyola 08290, Barcelona, Spain
| | - Daniel Errandonea
- Departamento
de Física Aplicada-ICMUV, MALTA Consolider Team, Universidad de Valencia, Dr. Moliner 50, Burjassot, 46100 Valencia, Spain
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An Investigation of the Pressure-Induced Structural Phase Transition of Nanocrystalline α-CuMoO4. CRYSTALS 2022. [DOI: 10.3390/cryst12030365] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The structural behavior of nanocrystalline α-CuMoO4 was studied at ambient temperature up to 2 GPa using in situ synchrotron X-ray powder diffraction. We found that nanocrystalline α-CuMoO4 undergoes a structural phase transition into γ-CuMoO4 at 0.5 GPa. The structural sequence is analogous to the behavior of its bulk counterpart, but the transition pressure is doubled. A coexistence of both phases was observed till 1.2 GPa. The phase transition gives rise to a change in the copper coordination from square-pyramidal to octahedral coordination. The transition involves a volume reduction of 13% indicating a first-order nature of the phase transition. This transformation was observed to be irreversible in nature. The pressure dependence of the unit-cell parameters was obtained and is discussed, and the compressibility analyzed.
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Kang J, Gwon YR, Cho SK. Photoelectrochemical water oxidation on PbCrO4 thin film photoanode fabricated via Pechini method: Various solution-processes for PbCrO4 film synthesis. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114601] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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