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Leucite Nepheline Melilite Apatite & Pyroxene Group

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ZLT120683

Leucite Nepheline Melilite Apatite & Pyroxene Group

Description Tabs

Description
Locality: 
Graulai Quarry, Hillesheim, Eifel, Rhineland-Palatinate, Germany
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 5 × 2.5 cm
Largest Crystal: 
0.40cm
Description

Part of a fissure in melilith-nephelinite covered with larger leucite crystals and many nepheline, melilite, apatite, proxene and some small magneite crystals. A characteristic and good sample for this paragenesis.

Mineral Data
What's on the rock

Leucite

Formula: 
K(AlSi2O6)
Strunz: 
9.GB.05
Hardness: 
5.5 - 6.0
Type Locality: 
Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy

Nepheline

Formula: 
(Na,K)AlSiO4
Strunz: 
9.FA.05
Hardness: 
5.5 - 6.0
Type Locality: 
Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy

Melilite

Group Parent: 
Melilite Group

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

Pyroxene Group

Group Members: 
Clinopyroxene Subgroup
Orthopyroxene Subgroup

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