Nastrophite

Formula: Na(Sr,Ba)(PO4).9H2O

Origin of name: from composition

 

Crystal system: cubic

Crystal class: 23

Twinning: 

Unit cell: 

 

Colour: colourless

Diaphaneity: 

Luster: vitreous

Habit: crystals 0.2 to 3 mm, irregular aggregates to 1 cm

Hardness: 2

Specific gravity: 2.05

Cleavage: none

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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