Chessexite

Formula:  Na₄Ca₂(Mg,Zn)₃Al₈(SiO₄)₂(SO₄)₁₀(OH)₁₀ ^. 40H₂O

Origin of name:  For Ronald Chessex, Swiss petrographer

Crystal system:  Orthorhombic

Crystal class:  Unknown

Twinning:

Unit cell:

Colour:  White

Diaphaneity:

Luster:  Silky

Habit:  As coatings on fluorite at the Maine Maine, Autun, France

Hardness:  to 2.21

Specific gravity:  2.21

Cleavage:  None

Tenacity:

Streak:

Synonyms/varieties:

Comments: