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Ardennite-(As) & Manganberzeliite

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CSL105112

Ardennite-(As) & Manganberzeliite

Rare Mineral

Description Tabs

Description
Locality: 
Varenche Mine, Saint-Barthélemy, Nus, Aosta Valley, Italy
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.6 × 3.2 × 2.6 cm
Description

Ardennite-(As) is a rare arsenate bearing Mn-Al-silicate species. It forms brown masses of lath like crystals in braunite-quartz matrix. There are orange-red spots in this mineral association, which has been identified as Manganberzeliite.

Mineral Data
What's on the rock

Ardennite-(As)

Formula: 
Mn2+4Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6
Group Parent: 
Ardennite Group
Strunz: 
9.BJ.40
Hardness: 
6.0 - 7.0
Type Locality: 
Salmchâteau, Vielsalm, Stavelot Massif, Luxembourg Province, Belgium

Manganberzeliite

Formula: 
(Ca,Na)3(Mn2+,Mg)2(AsO4)3
Strunz: 
8.AC.25
Hardness: 
4.5 - 5.0
Type Locality: 
Långban, Filipstad, Värmland, Sweden
Loranth Minerals

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