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Aenigmatite & Apatite

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CHP846319

Aenigmatite & Apatite

Classic Locality

Description Tabs

Description
Locality: 
Água de Pau Volcano, São Miguel Island, Azores District, Portugal
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.7 × 2.5 × 2 cm
Description

specimen with some fantastic V of black metallic prismatic crystals of aenigmatite with associate a white prism of apatite.

c. 1985

Mineral Data
What's on the rock

Aenigmatite

Formula: 
Na2Fe2+5Ti(Si6O18)O2
Strunz: 
9.DH.40
Crystal System: 
Triclinic
Hardness: 
5.5 - 6.0
Type Locality: 
Kangerluarsuk Fjord (Kangerdluarssuq Fjord), Ilímaussaq complex, Narsaq, Kujalleq, Greenland

Apatite

Synonym Of: 

Chlorapatite

Formula: 
Ca5(PO4)3Cl
Strunz: 
8.BN.05
Hardness: 
5.0

Fluorapatite

Formula: 
Ca2Ca3(PO4)3F
Strunz: 
8.BN.05
Hardness: 
5.0

Hydroxylapatite

Formula: 
Ca5(PO4)3(OH)
Strunz: 
8.BN.05
Hardness: 
5.0
Crystal System: 
Hexagonal
Hardness: 
5

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