Melkovite

Formula:  CaFeH6(MoO4)4(PO4) . 6H2O

Origin of name:  For V. Melkov, Russian mineralogist

 

Crystal system:  Monoclinic probable

Crystal class:  m

Twinning: 

Unit cell: 

 

Colour:  Lemon-yellow to brownish yellow

Diaphaneity: 

Luster:  Dull to waxy

Habit:  Platy crystals 0.001 - 0.002 mm in powdery films and veinlets

Hardness:  ~ 3

Specific gravity:  2.971

Cleavage:  1; perfect

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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