Magnesiotaramite

Formula:  Na(CaNa)Mg3AlFe(Si6Al2)O22(OH)2

Origin of name:  From magnesium and taramite

 

Crystal system:  Monoclinic

Crystal class:  2/m

Twinning: 

Unit cell: 

 

Colour:  Black to green

Diaphaneity: 

Luster:  Vitreous

Habit:  Prismatic

Hardness:  5 to 6

Specific gravity:  3.13

Cleavage:  3; {110} perfect, {100} and {001} partings

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments:  Series with taramite

 

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