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Ingersonite With Philipstadite & Tegengrenite

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QRI683378

Ingersonite With Philipstadite & Tegengrenite

Type Locality

Description Tabs

Description
Locality: 
Långban, Filipstad, Värmland County, Sweden
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.9 × 2.8 × 1.9 cm
Description

Rich specimen hosting three very rare species for Langban: ingersonite (yellow), filipstadite (black) and tegengrenite (brown). All species are mostly grainy, with crystals up to 1 mm across and several moderately lustrous faces/cleavage surfaces. Filipstadite mostly concentrates in one relatively sizeable patch (a few millimeters).
Quite rare.

Mineral Data
What's on the rock

Ingersonite

Formula: 
Ca3MnSb4O14
Strunz: 
4.DH.40
Hardness: 
6.5
Type Locality: 
Långban, Filipstad, Värmland, Sweden

Philipstadite

Variety Of: 

Ferro-hornblende

Formula: 
☐{Ca2}{Fe2+4Al}(AlSi7O22)(OH)2
Strunz: 
9.DE.10
Hardness: 
5.0 - 6.0
Formula: 
Ca2(Fe2+,Mg,Fe3+)5(Si,Al)8O22(OH)2
Hardness: 
0.0

Tegengrenite

Formula: 
(Mg,Mn2+)2Sb5+0.5(Mn3+,Si,Ti)0.5O4
Strunz: 
4.BB.20
Crystal System: 
Trigonal
Hardness: 
0.0
Type Locality: 
Jakobsberg Mine, Nordmark (Nordmarksberg), Filipstad, Värmland, Sweden

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