Čechite

Formula:  Pb(Fe,Mn)(VO4)(OH)

Origin of name:  For F. Cech

 

Crystal system:  Orthorhombic

Crystal class:  2/m 2/m 2/m

Twinning:

Unit cell:

 

Colour:  Black

Diaphaneity:

Luster:  Submetallic to resinous

Habit:  Crystals small, rare; granular masses

Hardness:  4.5 to 5

Specific gravity:  5.88

Cleavage:  None

Tenacity:

Streak:  Black

 

Synonyms/varieties:

 

Comments:

 

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