Belyankinite

Formula:  Ca_1-2 (Ti,Zr,Nb)₅ O₁₂ ^. 9H₂O

Origin of name:  For Dmitri Belyankin, Russian petrographer and mineralogist

Crystal system:  Amorphous

Crystal class:  Unknown

Twinning:

Unit cell:

Colour:  Light yellow to brownish yellow

Diaphaneity:

Luster:  Vitreous to greasy, pearly on cleavage

Habit:  Cleavable masses

Hardness:  2 to 3

Specific gravity:  2.32 to 2.40

Cleavage:  None

Tenacity:

Streak:

Synonyms/varieties:

Comments:  Series with manganbelyankinite