Larisaite

FormulaNa(H3O)(UO2)3(SeO3)2O2·4H2O

Origin of name: for Larisa Nikolaevna Belova (1923-1998), Russian mineralogist and crystallographer

 

Crystal system: Monoclinic

Crystal class: 2

Twinning: 

Unit cell: a = 6.9806, b = 17.249, c = 7.646, β = 90.039°

 

Colour: Yellow, greenish yellow

Diaphaneity: Transparent

Luster: Vitreous

Habit: Acicular, radial sprays, lamellar

Hardness: 1

Specific gravity: 4.46 (calculated)

Cleavage: 1; {010} perfect

Tenacity: Sectile fracture

Streak: Yellow

 

Synonyms/varieties:

 

Comments: 

 

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