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Jahnsite & Mitridatite

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BCK664800

Jahnsite & Mitridatite

Kay Robertson collection
Type Locality

Description Tabs

Description
Locality: 
Tip Top Mine, Fourmile, Custer County, South Dakota, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.6 × 1.5 × 1.3 cm
Description

You are bidding on a small sample with a fracture surface covered in nice brown clusters of jahnsite-CaMnMg amongst thousands of tabular robertsite/mitridatite crystals on quartz. A very nice sample from the Kay Robertson collection. 

Mineral Data
What's on the rock

Jahnsite

Synonym Of: 

Jahnsite-(CaMnFe)

Formula: 
{Ca}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2·8H2O
Strunz: 
8.DH.15
Hardness: 
4.0

Jahnsite-(CaMnMg)

Formula: 
{Ca}{Mn2+}{(Mg,Fe2+)2}{Fe3+2}(PO4)4(OH)2·8H2O
Strunz: 
8.DH.15
Hardness: 
4.0

Jahnsite-(CaMnMn)

Formula: 
{Ca}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2·8H2O
Strunz: 
8.DH.15
Hardness: 
4.0

Jahnsite-(MnMnMn)

Formula: 
{Mn2+}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2·8H2O
Strunz: 
8.DH.15
Hardness: 
4.0

Mitridatite

Formula: 
Ca2Fe3+3(PO4)3O2·3H2O
Strunz: 
8.DH.30
Crystal System: 
Monoclinic
Hardness: 
2.5
Type Locality: 
Kamysh-Burun Trough, Kerchenskoe deposit, Kerchenskyi (Fe)-ore basin, Kerch peninsula (Kertch peninsula), Crimea peninsula, Crimea Oblast', Ukraine...

Seller Information

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