Alvanite from Kazakhstan, U.S.S.R." new crystallographic and chemical data
نویسندگان
چکیده
Alvanite is monoclinic P2Jn, with a = 17.808(8), b = 5.132(3), c = 8.881(4)A, and/3 = 92.11(3) ~ The density is 2.49 g/cm 3 (meas), 2.492 g/cm ~ (calc), Microprobe analysis yielded A1203 34.2, FeO 0.3, ZnO 7.6, NiO 4.2, V205 27.5, H20 (by difference) 26.2, total = 100.0 wt. %. This leads to the idealized formula (Zn,Ni)A14(VO3)2(OH)j2.2H20 with Z = 2.
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