Abstract

gsminmag

Mineralogical Magazine

0026-461X

Mineralogical Society

10.1180/minmag.1990.054.377.13

Crystal Structures

Alvanite from Kazakhstan, U.S.S.R.: New Crystallographic and Chemical Data

Dunn

Pete J.

Department of Mineral Sciences, Smithsonian Institution, Washington, DC 20560 Roberts

Andrew C.

Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario, Canada K1A OE8 Pertlik

Franz

Institut für Mineralogie und Kristallographie, Universitat Wien, A-1010 Wien, Austria

12 1990

54 377 609 611 20 2 1990

1990

Abstract

Alvanite is monoclinic P2₁/n, with a = 17.808(8), b = 5.132(3), c = 8.881(4)Å, and β = 92.11(3)⁰. The density is 2.49 g/cm³ (meas), 2.492 g/cm³ (calc), Microprobe analysis yielded Al₂O₃ 34.2, FeO 0.3, ZnO 7.6, NiO 4.2, V₂O₅ 27.5, H₂O (by difference) 26.2, total = 100.0 wt. %. This leads to the idealized formula (Zn,Ni)Al₄(VO₃)₂(OH)_12·2H₂O with Z = 2.

Keywords alvanite crystallography Kazakhstan U.S.S.R.