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Arisite-(Ce) Natrolite Bastnäsite-(Ce) & Aegirine

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MEX510268

Arisite-(Ce) Natrolite Bastnäsite-(Ce) & Aegirine

ex Ralf Wartha, Windhoek stock
Type Locality

Description Tabs

Description
Locality: 
Aris Quarry, Windhoek Rural, Khomas Region, Namibia
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.6 × 2.1 × 2.5 cm
Description

Rich paragenesis specimen, on two vugs are scattered arisite ce groups, prismatic colorless natrolite, white silky balls of bastnäsite ce and black aegirine needles.

Mineral Data
What's on the rock

Arisite-(Ce)

Formula: 
NaCe2(CO3)3-xF2x+1
Strunz: 
5.BD.18
Hardness: 
0.0
Type Locality: 
Aris Quarries (Ariskop Quarry; Railway Quarry), Aris, Windhoek District, Khomas Region, Namibia

Natrolite

Formula: 
Na2Al2Si3O10·2H2O
Strunz: 
9.GA.05
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Hohentwiel, Singen, Hegau, Baden-Württemberg, Germany

Bastnäsite-(Ce)

Formula: 
(Ce,La)(CO3)F
Strunz: 
5.BD.20a
Crystal System: 
Hexagonal
Hardness: 
4.0 - 4.5
Type Locality: 
Bastnäs mines, Riddarhyttan, Skinnskatteberg, Västmanland, Sweden

Aegirine

Formula: 
NaFe3+Si2O6
Group Parent: 
Clinopyroxene Subgroup
Strunz: 
9.DA.25
Crystal System: 
Monoclinic
Hardness: 
6.0
Type Locality: 
Rundemyr, Øvre Eiker, Buskerud, Norway