Kutnahorite

Formula:  Ca(Mn,Mg,Fe)(CO3)2

Origin of name:  After locality; Kutná Hora, Czech Republic

 

Crystal system:  Hexagonal

Crystal class:  -3

Twinning: 

Unit cell: a = 4.85 Ǻ, c = 16.34 Ǻ

 

Colour:  White, pale pink, pale rose

Diaphaneity: 

Luster: 

Habit:  Anhedral masses; cleavable aggregates

Hardness:  3.5 to 4

Specific gravity:  3.12

Cleavage:  None

Tenacity:  Subconchoidal; brittle

Streak: 

 

Synonyms/varieties:

 

Comments:  Series with dolomite and with ankerite

 

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