Hydroxycancrinite

Formula:  Na₈Al₆Si₆O₂₄(OH)₂ ^. 2H₂O

Origin of name:  From hydroxyl and cancrinite

Crystal system:  Hexagonal

Crystal class:  3

Twinning: 

Unit cell: 

Colour:  Blue

Diaphaneity:  Transparent

Luster:  Vitreous

Habit:  Massive aggregates 10-15 mm across

Hardness:  6

Specific gravity:  2.32

Cleavage:  1; {100} perfect

Tenacity: 

Streak:  White

Synonyms/varieties:

Comments:  Dissolves easily in acids at room temperature