Berzeliite

Formula:  (Ca,Na)3(Mg,Mn)2(AsO4)3

Origin of name:  For Baron Jons Berzelius, Swedish chemist

 

Crystal system:  Cubic

Crystal class:  4/m -3 2/m

Twinning:

Unit cell:

 

Colour:  Sulfur yellow to orange-yellow

Diaphanetiy:  Transparent to translucent

Luster:  Resinous

Habit:  Crystals rare as tiny modified trapezohedrons; massive, rounded grains

Hardness:  4.5 to 5

Specific gravity:  ~  4.08

Cleavage:  None

Tenacity:

Streak:

 

Synonyms/varieties:

 

Comments:  Series with manganberzeliite; atomic structure similar to garnet

 

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