Burkeite

Formula:  Na6(CO3)(SO4)2

Origin of name:  For William Burke, American chemical engineer

 

Crystal system:  Orthorhombic

Crystal class:  2/m 2/m 2/m

Twinning:

Unit cell:

 

Colour:  White, pale tan, greyish

Diaphaneity:  Transparent

Luster:  Vitreous to greasy

Habit:  Crystals tabular; massive, spherical to irregular nodules, reticulated aggregates

Hardness:  3.5

Specific gravity:  2.57

Cleavage:  None

Tenacity:

Streak:

 

Synonyms/varieties:

 

Comments:  Soluble in water

 

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