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Ancylite-(La) With Aegirine

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LGM122224

Ancylite-(La) With Aegirine

Ex Ring collection, Munich, Germany
Type Locality

Description Tabs

Description
Locality: 
Kukisvumchorr Mountains, Khibiny Massif, Kola, Russian Federation
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2.3 × 3.3 × 1.7 cm
Weight: 
12.00gr
Description

A matrix of white microcline feldspar and dark green aegirine needles hosts an area with minute brownish-yellowish crystals of ancylite-(La), the only Sr- and La-rich mineral presently known. Ancylite-(La) crystals form an earthy-looking, thin crust.

From the type locality of ancylite-(La):
Marchenko Peak, Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia

Mineral Data
What's on the rock

Ancylite-(La)

Formula: 
Sr(La,Ce)(CO3)2(OH)·H2O
Strunz: 
5.DC.05
Crystal System: 
Orthorhombic
Hardness: 
4.0 - 4.5
Streak: 
White
Type Locality: 
Marchenko Peak, Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia...

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

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