Heyite

heyite

pyromorphite

shattuckite

wulfenite

Images

Formula: Pb₅Fe²⁺₂O₄(VO₄)₂
Anhydrous vanadate
Crystal System: Monoclinic
Specific gravity: 6.3 measured, 6.284 calculated
Hardness: 4
Streak: Amber-yellow
Colour: Marigold-orange, orange-brown
Solubility: Unaffected by cold 1:1 nitric acid, but slowly and completely dissolves when warmed. In 1:1 hydrochloric acid heyite reacts quickly to form PbCl₂. It quickly dissolves in hot 40% KOH but is unaffected when cold (Mindat).
Environments

Sedimentary environments
Hydrothermal environments

Localities

At the Gold Quarry Mine, Maggie Creek Mining Subdistrict, Carlin Trend, Eureka County, Nevada, USA, heyite occurs along a fault through a stockwork disseminated gold deposit (HOM).

At the type locality, the Betty Jo Claim, Nevada Mining District, White Pine County, Nevada, USA, heyite occurs in a silicified breccia in limestone. Associated minerals include pyrite, chalcopyrite, galena, pyromorphite, cerussite, wulfenite, mimetite, shattuckite and chrysocolla. Heyite occurs on and replaces corroded tungsten-rich wulfenite.
The heyite is transparent, and yellow-orange with a yellow streak. The crystals are small, up to 0.4 mm in size, and simple in habit (AM 59.381-384).

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