Ceriopyrochlore-(Ce)

Formula:  (Ce,Ca,Y)2(Nb,Ta)2O6(OH,F)

Origin of name:  From cerium and pyrochlore

 

Crystal system:  Cubic

Crystal class:  4/m -3 2/m

Twinning:

Unit cell:

 

Colour:  Light to dark brown

Diaphaneity:  Transparent

Luster:  Resinous on fracture

Habit:  Crystals octahedral

Hardness:  5 to 5.5

Specific gravity:  4.13

Cleavage:  None

Tenacity:

Streak:  Light brown to yellowish

 

Synonyms/varieties:

 

Comments: 

 

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