Ewaldite

Formula:   Ba(Ca,Y,Na,K)(CO3)2

Origin of name:   For Paul Ewald, German-American physicist

 

Crystal system:   Hexagonal

Crystal class:   6mm

Twinning:

Unit cell: 

 

Colour:  Bluish-green

Diaphaneity:

Luster:

Habit:   Hemimorphic polycrystals, tiny

Hardness:

Specific gravity:   3.25

Cleavage:   None

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments:   Polymorphous with Mckelveyite

 

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