Katayamalite

Formula:  KCa₇Li₃Ti₂(Si₆O₁₈)₂(OH,F)₂

Origin of name:  For Nabuo Katayama; Japanese mineralogist

Crystal system:  Triclinic

Crystal class:  -1

Twinning: 

Unit cell: 

Colour:  White

Diaphaneity: 

Luster:  Vitreous

Habit:  Crystals tabular; granular aggregates

Hardness:  3.5 to 4

Specific gravity:  2.89

Cleavage:  1; {001} perfect

Tenacity: 

Streak:  White

Synonyms/varieties:

Comments:  Fluoresces blue-white under SW; determined to be same as baratovite, but neither has been proposed to be discredited