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Armalcolite Pseudobrookite & Enstatite

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SKY652090

Armalcolite Pseudobrookite & Enstatite

Rare Mineral

Description Tabs

Description
Locality: 
La Aljorra Quarries, La Aljorra, Cartagena, Murcia, Spain
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 2 × 1.5 cm
Description

Nice sample of this curious mineral (perfectly developed prismatic dark brown crystals) that has its type locality in the Moon !!. The name is from ARMstrong, ALdrin and COLlins the first men who traveled to the moon in 1969 .

More precisely, the mineral belongs to the armalcolite-pseudobrookite series. Associated minerals in the sample are enstatite in light brown crystals, trydimite and fluorphlogopite.

Mineral Data
What's on the rock

Armalcolite

Formula: 
(Mg,Fe2+)Ti2O5
Strunz: 
4.CB.15
Crystal System: 
Orthorhombic
Hardness: 
5.0 - 0.0
Colour: 
Grey
Type Locality: 
Tranquillity Base (Apollo 11 landing site), Mare Tranquillitatis (Sea of Tranquility), The Moon

Pseudobrookite

Formula: 
Fe2TiO5
Strunz: 
4.CB.15
Crystal System: 
Orthorhombic - Dipyramidal
Hardness: 
6.0
Streak: 
Brown
Type Locality: 
Uroi Hill (Arany Hill), Simeria, Hunedoara Co., Romania

Enstatite

Formula: 
MgSiO3
Group Parent: 
Orthopyroxene Subgroup
Strunz: 
9.DA.05
Crystal System: 
Orthorhombic - Dipyramidal
Hardness: 
5.0 - 6.0

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