Yushkinite

Formula: V1-xS.n(Mg,Al)(OH)2

Origin of name: for Nikolai Pavlovich Yushkin (1936-), Russian mineralogist

 

Crystal system: Trigonal

Crystal class: 3m

Twinning:

Unit cell: a = 3.21, c = 11.3

 

Colour: Red-lilac to pinkish gray in thin fragments, violet

Diaphaneity: Opaque

Luster: Metallic

Habit: Flaky or scaly, in aggregates 2 to 8 mm across

Hardness: <1

Specific gravity: 2.94

Cleavage: None

Tenacity: Plastic

Streak: Reddish gray

 

Synonyms/varieties:

 

Comments: 

 

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