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Kingsmountite Jahnsite-(CaMnMn) & Matulaite

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PAV917876

Kingsmountite Jahnsite-(CaMnMn) & Matulaite

Classic Locality

Description Tabs

Description
Locality: 
Cerdeirinha Mine, Arga de Baixo, Caminha, Viana do Castelo District, Portugal
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.2 × 1.2 cm
Description

Nice sample!

Several groups of white to very pale yellow kingsmountite, associated to orange jahnsite-(CaMnMn) and white spheroidal matulaite.
Analyzed by XRD, SEM-EDS and EMPA.

Collected: 
Boxed with Label
Mineral Data
What's on the rock

Kingsmountite

Formula: 
Ca4(Fe2+,Mn2+)Al4(PO4)6(OH)4·12H2O
Strunz: 
8.DH.25
Hardness: 
2.5
Streak: 
White
Type Locality: 
Foote Lithium Co. Mine (Foote Mine), Kings Mountain District, Cleveland Co., North Carolina, USA

Jahnsite-(CaMnMn)

Formula: 
{Ca}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2·8H2O
Strunz: 
8.DH.15
Hardness: 
4.0
Streak: 
White
Type Locality: 
Cubos-Mesquitela-Mangualde area, Mangualde, Viseu District, Portugal

Matulaite

Formula: 
(Fe3+,Al)Al7(PO4)4(PO3OH)2(OH)8(H2O)8·8H2O
Strunz: 
8.DK.30
Hardness: 
1.0
Type Locality: 
Bachman Mine, Hellertown, Lower Saucon Township, Northampton Co., Pennsylvania, USA