Images
Formula: As
Native element, antimony-bearing arsenic, orthorhombic
paramorph of trigonal arsenic and orthorhombic
arsenolamprite
Crystal System: Orthorhombic
Specific gravity: 5.88 measured, 5.99 calculated
Hardness: 2 to 2½
Streak: Black
Colour: Grey
Common impurities: Sb,S
Environments
Unlike normal native arsenic, pararsenolamprite is stable in the atmosphere. Found with
stibnite on mammillary arsenic in a quartz vein from a
hydrothermal silver-gold mine
(Mindat).
Localities
At the type locality, the Hinoji mine, Yamaga, Hayami District, Oita Prefecture, Japan, pararsenolamprite occurs as euhedral crystals in close association with
arsenic, stibnite and quartz in an
antimony - arsenic - silver -
gold bearing quartz vein cutting altered Neogene (23 million to 2.6 million years ago )
andesite. It forms radial or parallel aggregates of bladed cystals up to 0.8 mm in length
(MM 65.807-812).
Pararsenolamprite from the Hinoji Mine - Image
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