Crichtonite

Formula:  (Sr,La,Ce,Y)(Ti,Fe,Mn)21O38

Origin of name:  For A. Crichton, Scottish collector

 

Crystal system:  Hexagonal

Crystal class:  -3

Twinning:

Unit cell:

 

Colour:  Black

Diaphaneity: 

Luster:

Habit:  Crystals thick tabular

Hardness:  5 to 6

Specific gravity:  4.56

Cleavage:

Tenacity:

Streak:

 

Synonyms/varieties:

 

Comments:

 

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