Scorodite : Fe3+AsO4·2H2O
Copiapite : Fe2+Fe3+4(SO4)6(OH)2·20H2O
Metavoltine : K2Na6Fe2+Fe3+6O2(SO4)12·18H2O
As recorded:
Sulphur Hole, Calico, Calico District, Calico Mts, San Bernardino County, California, USA
Collected by:
Photo added to mindat.org
“This material is from the first verified find of arsenate mineral at the Sulfur Hole by MarekC and Bob Housley.
Collected from the side wall of the hydrothermal chimney directly above the hole during April 2019 MSSC post-fieldtrip to Borate area. Raman verified.
Cellphone photo thru the eyepiece of the microscope.”
Marek Chorazewicz - 12th May 2019
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