Park SM, Kim SJ, Kanatzidis MG. Sr2MnSb2: A New Ternary Transition Metal Zintl Phase.
Inorg Chem 2005;
44:4979-82. [PMID:
15998025 DOI:
10.1021/ic048252e]
[Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A transition metal-containing Zintl phase, Sr2MnSb2, was prepared from a stoichiometric combination reaction of the elements in Sn flux, and its structure was determined by single-crystal X-ray diffraction methods. The compound crystallizes in the orthorhombic space group Pnma with a = 15.936(3) A, b = 14.498(3) A, c = 8.2646(17) A, and Z = 12. The structure of Sr2MnSb2 is composed of corrugated layers of corner- and edge-shared MnSb4 tetrahedra. The basic building unit of the layer is a [Mn3Sb6]12- cluster composed of three edge-shared MnSb4 tetrahedra. These trinuclear clusters share four Sb vertexes to form a layer with cavities. Sr2+ cations are located at the inter- and intralayer space. Magnetic susceptibility measurements indicate an effective magnetic moment of 4.85 mu(B), a value smaller than what would be expected from Mn2+ ions.
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