TY - JOUR
T1 - Unusual forms of magnetite in the Orgueil carbonaceous chondrite
AU - Hua, Xin
AU - Buseck, P R
PY - 1998/7
Y1 - 1998/7
N2 - The Orgueil CI carbonaceous chondrite contains magnetite (Fe3O4) that displays a rich and seemingly unique variety of morphologies. While many have already been described, recent images provide far greater definition and, thus, provide more unambiguous identification of trapezohedral crystals and possibly also trisoctahedral forms. Although it is an extremely abundant terrestrial mineral and commonly occurs in well-developed crystals, neither of these forms have been recognized previously from magnetite. The barrel-shaped arrays of magnetite discs ("plaquettes") are also unique. It appears as if the circumstances for the formation of these unusual crystals were somehow exceptional. Their morphologies and association with sulfates and carbonates suggest an aqueous origin.
AB - The Orgueil CI carbonaceous chondrite contains magnetite (Fe3O4) that displays a rich and seemingly unique variety of morphologies. While many have already been described, recent images provide far greater definition and, thus, provide more unambiguous identification of trapezohedral crystals and possibly also trisoctahedral forms. Although it is an extremely abundant terrestrial mineral and commonly occurs in well-developed crystals, neither of these forms have been recognized previously from magnetite. The barrel-shaped arrays of magnetite discs ("plaquettes") are also unique. It appears as if the circumstances for the formation of these unusual crystals were somehow exceptional. Their morphologies and association with sulfates and carbonates suggest an aqueous origin.
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U2 - 10.1111/j.1945-5100.1998.tb01335.x
DO - 10.1111/j.1945-5100.1998.tb01335.x
M3 - Article
AN - SCOPUS:0001484681
SN - 1086-9379
VL - 33
SP - A215-A220
JO - Meteoritics and Planetary Science
JF - Meteoritics and Planetary Science
IS - 4 SUPPL.
ER -