Morelandite

Formula:  (Ba,Ca,Pb)5(AsO4,PO4)3Cl

Origin of name:  For Grover Moreland, museum laboratory supervisor

 

Crystal system:  Hexagonal

Crystal class:  6/m

Twinning: 

Unit cell: 

 

Colour:  Light yellow to gray

Diaphaneity: 

Luster:  Vitreous to greasy

Habit:  Massive, granular

Hardness:  4.5

Specific gravity:  5.32

Cleavage:  1; {0001} poor

Tenacity: 

Streak:  White

 

Synonyms/varieties:

 

Comments: 

 

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