Bulletin of the Geological Society of Finland (Dec 1968)

A hydrated oxide of chromium as a pseudomorph after eskolaite, Outokumpu, Finland

  • Y. Vuorelainen,
  • T.A. Häkli,
  • M. Kataja

DOI
https://doi.org/10.17741/bgsf/40.014
Journal volume & issue
Vol. 40
pp. 125 – 129

Abstract

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A new chromium mineral, hydrated oxide of chromium, has been identified as a pseudomorph after eskolaite, C2O3 in the Outokumpu orebody. Electron microprobe analyses suggest the formula as 2 (Cr1.77V0.16Al0.04Fe0.03O3 • 3(H2O) The mineral is orthorhombic, a0 = 5.918 Å, b0 = 8.610 Å, c0 = 9.727 Å, Z = 4, V = 495 Å3; and D calc = 4.81 g/cm3;.