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Laubmannite

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JYJ53696

Laubmannite

Classic Locality

Description Tabs

Description
Locality: 
Hagendorf South Pegmatite, Bavaria, Germany
Size Range: 
Thumbnail (1-3cm)
Size: 
1.2 × 0.8 × 0.4 cm
Description

Small frondelite and laubmannite on rockbridgeite. Deep green at the beginning of the crystal, lighter green at the end of the crystal.

Mineral Data
What's on the rock

Laubmannite

Mixture Of: 

Dufrénite

Formula: 
Ca0.5Fe2+Fe3+5(PO4)4(OH)6·2H2O
Strunz: 
8.DK.15
Hardness: 
3.5 - 4.5

Kidwellite

Formula: 
NaFe3+9(PO4)6(OH)11·3H2O
Strunz: 
8.DK.20
Hardness: 
3.0

Beraunite

Formula: 
Fe2+Fe3+5(PO4)4(OH)5·6H2O
Strunz: 
8.DC.27
Hardness: 
3.0 - 4.0
Formula: 
Previously published; Fe2+3Fe3+6(PO4)4(OH)12
Hardness: 
3.5 - 4
Colour: 
Brown, Greenish brown, Grayish green, Yellow green, Dark green
Streak: 
Brownish
Type Locality: 
Shady, Polk County, Arkansas, USA