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Rasvumite & Villiaumite

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SKY707605

Rasvumite & Villiaumite

Type Locality

Description Tabs

Description
Locality: 
Rasvumchorr Mountain, Khibiny Massif, Murmansk Oblast, Russian Federation
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.7 × 1 × 0.8 cm
Description

Brown crystal aggregates of the rare potassium sulphide mineral rasvumite from the type locality, associated to pink villiaumite

Rasvumite is one of the few sulphides with sodium in its chemical composition

Mineral Data
What's on the rock

Rasvumite

Formula: 
KFe2S3
Strunz: 
2.FB.20
Crystal System: 
Orthorhombic
Hardness: 
4.0 - 5.0
Type Locality: 
Kirovskii apatite mine (Kirovsky Mine; Kirovskii Mine; Kirov Mine), Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia...

Villiaumite

Formula: 
NaF
Strunz: 
3.AA.20
Crystal System: 
Isometric
Hardness: 
2.0 - 2.5
Streak: 
White
Type Locality: 
Rouma Island (Roume Island; Roma Island; Ruma Island), Los Archipelago (Los Islands), Guinea

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