Mineralpedia Details for Vajdakite

Vajdakite (IMA No. 1998–031) is named after Josef Vajdak of Pequa Rare Minerals, Massapequa, New York, USA, in recognition of his significant contributions to mineralogical research on the Jáchymov ore district. Vajdakite is a monoclinic molybdenum bearing arsenide which occurs in veins associated with arsenic, scorodite, annabergite, nickelskutterudite, löllingite, and köttigite.

For more information see http://rruff.info/rruff_1.0/uploads/CM41_1309.pdf

Formula

(Mo⁶⁺O₂)₂As³⁺₂O₅·3H₂O 

Crystal System

Monoclinic 

Crystal Habit

Acicular, Aggregates 

Cleavage

Perfect, Good, None 

Luster

Vitreous (Glassy) 

Color

green, greenish gray 

Streak

light grayish green 

Class

Monoclinic - Prismatic 

Hardness

- 

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Mindat

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Special Info

Type & Only Locality

Vajdakite (IMA No. 1998–031) is named after Josef Vajdak of Pequa Rare Minerals, Massapequa, New York, USA, in recognition of his significant contributions to mineralogical research on the Jáchymov ore district. Vajdakite is a monoclinic molybdenum bearing arsenide which occurs in veins associated with arsenic, scorodite, annabergite, nickelskutterudite, löllingite, and köttigite.

For more information see http://rruff.info/rruff_1.0/uploads/CM41_1309.pdf