Bjarebyite

Formula:  (Ba,Sr)(Mn,Fe,Mg)2Al2(PO4)3(OH)3

Origin of name:  For G. Bjareby, Swedish-American collector

 

Crystal system:  Monoclinic

Crystal class:  2/m

Twinning:

Unit cell: a = 8.93 Ǻ, b = 12.07 Ǻ, c = 4.92 Ǻ, β = 100.2°

 

Colour:  Emerald-green

Diaphaneity:

Luster:  Subadamantine

Habit:  Crystals complex and steeply terminated

Hardness:  ~  4

Specific gravity:  4.02

Cleavage:  2; {010} and {100} perfect

Tenacity:

Streak:  White

 

Synonyms/varieties:

 

Comments:

 

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