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2005
Structure
D 2000
32- 004
Crystal Structure of the Y3.33CuPb1.5X7 (X: S, Se) Compounds. — The isotypic title
compounds crystallize in the monoclinic space group Cm with Z = 2 as revealed by
powder XRD. Their crystal structure can be derived from that of Y5X7 (X: S, Se). The
positions of the Y atoms with trigonal prismatic coordination in the Y5X7 compounds
correspond to the positions of the atoms of a statistical mixture M (Y+Pb) and Pb in the
structures of the title compounds. Additional positions of the Cu atoms with tetrahedral
coordination exists in the title compounds compared with Y5X7. — (GULAY*, L. D.;
SHEMET, V. Y.; OLEKSEYUK, I. D.; J. Alloys Compd. 394 (2005) 1-2, 250-254;
Dep. Gen. Inorg. Chem., Volyn State Univ., Lutsk 43009, Ukraine; Eng.) —
W. Pewestorf
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