Dundasite

Formula:   PbAl2(CO3)2(OH)4 . H2O

Origin of name:   Locality; Dundas, Tasmania, Australia

 

Crystal system:   Orthorhombic

Crystal class:   2/m 2/m 2/m

Twinning:

Unit cell: a = 9.08 Å, b = 16.37 Å, c = 5.62 Å

 

Colour:  White

Diaphaneity:

Luster:   Vitreous to silky

Habit:   Crystals radiating forming small rounded aggregates; matted crusts

Hardness:   2

Specific gravity:   3.41 to 3.55

Cleavage:   1; {010} perfect

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments:

 

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