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Caysichite-(Y) Aegirine Zircon Pyrochlore & Parisite-(Ce)

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ALB191731

Caysichite-(Y) Aegirine Zircon Pyrochlore & Parisite-(Ce)

Description Tabs

Description
Locality: 
Mount Malosa, Zomba, Southern Region, Malawi
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.2 × 3 × 1.3 cm
Description

Superb group of aegirine crystals with orthoclase with sharp dark brown zircon crystals. But the rarity of the piece is the presence of some yellow-brown caysichite crystals (analyzed), associated with altered pyrochlore and parisite. There are other altered crystals that maybe aeschinite.

Mineral Data
What's on the rock

Caysichite-(Y)

Formula: 
Ca2Y2Si4O10(CO3)3·4H2O
Strunz: 
9.DJ.15
Hardness: 
4.5
Type Locality: 
Evans-Lou Mine, Lac Saint-Pierre (Wakefield Lake), Val-des-Monts, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada...

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

Zircon

Formula: 
ZrSiO4
Strunz: 
9.AD.30
Crystal System: 
Tetragonal
Hardness: 
7.5
Streak: 
White

Pyrochlore

Synonym Of: 

Pyrochlore Group

Formula: 
A2Nb2(O,OH)6Z
Strunz: 
4
Hardness: 
5 - 5.5
Group Parent: 
Pyrochlore Group

Parisite-(Ce)

Formula: 
Ca(Ce,La)2(CO3)3F2
Strunz: 
5.BD.20b
Crystal System: 
Hexagonal
Hardness: 
4.5
Type Locality: 
Mun. de Muzo, Vasquez-Yacopí Mining District, Boyacá Department, Colombia

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