摘要: Ag3Ca5 is tetragonal, a = 8.039 ± 5 A, c = 15.011 ± 15 A, c/a = 1.87, space group I4/mcm. The structure of the D8l type with 4 AgI in 4(a); 8 AgII 8(h), x = 0.378 ± 5; 4CaI 4(c); and 16 CaII 16(l), x = 0.164 ± 5 z = 0.150 ± 5. characterized by sheets closely linked Ag Ca atoms parallel to (001). An indexed powder pattern given. NH4Pb2Br5, RbPb2Br5, KPb2Br5 also have same should be included together B3Cr5, Ge3Ta5, Si3Ta5, Si3Nb5 group.
nrcresearchpress.com参考文章(2)
Hans Nowotny, Alan W. Searcy, J. E. Orr, Structures of Some Germanides of Formula M5Ge3 The Journal of Physical Chemistry. ,vol. 60, pp. 677- 678 ,(1956) , 10.1021/J150539A042
V. Luzzati, Traitement statistique des erreurs dans la determination des structures cristallines Acta Crystallographica. ,vol. 5, pp. 802- 810 ,(1952) , 10.1107/S0365110X52002161