Pyrophanite

Formula: MnTiO3

Origin of name: from Greek for fire and to appear

 

Crystal system: hexagonal

Crystal class: -3

Twinning: 

Unit cell: 

 

Colour: brownish red, blood-red to greenish yellow

Diaphaneity: 

Luster: metallic to submetallic

Habit: crystals tabular, small, embedded grains, fine scaly

Hardness: 5 to 6

Specific gravity: 4.54

Cleavage: 2; {02-21} perfect, {10-12} distinct

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: series with ilmenite

 

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