Formula :
CuFe23+[(O,OH)/(AsO4,PO4,SO4)]2 * 4 H2O
System: monoclinic Hardness:3-4 Rarity:rare
Strunz id:VII/D.8-40 -
PHOSPHATES, ARSENATES and VANADATES
Name origin: Named in 1964 by Richard J. Davis and Max Hutchinson Hey in honor of Sir Arthur Edward Ian Montague Russell [November 30, 1878 Folkestone, Kent, England, UK - February 23, 1964 UK], British mineral collector and Mr Arthur William Gerald Kingsbury [1906 East Meon, Hampshire, England, UK - August 3, 1968 UK], English mineralogists and collectors.
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