Betpakdalite

Formula:  (H,K)₆Ca₄Fe₆As₄Mo₁₆O₇₄ ^. 24-40H₂O

Origin of name:  Locality; Bet-Pak-Dal desert Kasakhstan

Crystal system:  Monoclinic

Crystal class:  2/m

Twinning:

Unit cell:

Colour:  Bright yellow with a weak greenish or brownish tint

Diaphanetiy:  Transparent

Luster:  Dull to waxy, powder vitreous

Habit:  Crystals micro, octahedral or short prismatic; powdery or finely crystalline aggregates

Hardness:  ~ 3

Specific gravity:  2.98 to 3.05

Cleavage:  1; {001} very good

Tenacity:

Streak:

Synonyms/varieties:

Comments: