Olgite

Formula: Na(Sr,Ba)PO4

Origin of name: for Olga Vorobieva, Russian mineralogist

 

Crystal system: hexagonal

Crystal class: 3

Twinning: 

Unit cell: 

 

Colour: bluish to bluish green

Diaphaneity: 

Luster: vitreous

Habit: crystals to 2 mm, grains

Hardness: 4.5

Specific gravity: 3.94

Cleavage: none

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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