Armalcolite

Химия

IMA chemistry:: (Mg,Fe2+)Ti2O5
Valence chemistry:: (Mg,Fe2+)Ti4+2O5

Классификация

Crystal systems:: orthorhombic
Space groups:: Bbmm
Structural group:: Pseudobrookite
IMA status:: Approved, Redefined

Происхождение

Country:: Moon
Published:: 1970
Oldest age Ma:: 4567.61
Paragenetic modes:: Abiotic, Primary, Secondary, Stage 1: Primary nebular phases, PM4 - Primary chondrule phases, Stage 3a: Earth's earliest Hadean crust, PM7 - Ultramafic igneous rocks, Stage 4a: Earth's earliest continental crust, PM30 - Terrestrial impact minerals, PM31 - Contact metamorphism, Stage 4b: Highly evolved igneous rocks, PM35 - Ultra-alkali and agpaitic igneous rocks, Stage 5: Initiation of plate tectonics, PM41 - Mantle metasomatism

Примечания

Anderson A T, Bunch T E, Cameron E N, Haggerty S E, Boyd F R, Finger L W, James O B, Keil K, Prinz M, Ramdohr P, El Goresy A (1970) Armalcolite: a new mineral from the Apollo 11 samples. Geochimica et Cosmochimica Acta, Supplemental Proceedings of the Apollo XI Lunar Science Conference 1, 55-63