Ximengite

Formula: BiPO4

Origin of name: from locality, Ximeng County, China

 

Crystal system: Trigonal

Crystal class: 32

Twinning:

Unit cell: a = 6.986, c = 6.4753

 

Colour: Colourless

Diaphaneity: Transparent

Luster: Vitreous, greasy

Habit: Grains smaller than 0.001 to 0.01 mm in irregular granular aggregates or earthy veinlets

Hardness: 4.5

Specific gravity

Cleavage: None observed

Tenacity: 

Streak: White

 

Synonyms/varieties:

 

Comments: fluoresces yellowish green under electron beam

 

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