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Raman spectroscopy of various phosphate minerals and occurrence of tuite in the Elga IIE iron meteorite. / Litasov, Konstantin D.; Podgornykh, Nikolay M.
в: Journal of Raman Spectroscopy, Том 48, № 11, 01.11.2017, стр. 1518-1527.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Raman spectroscopy of various phosphate minerals and occurrence of tuite in the Elga IIE iron meteorite
AU - Litasov, Konstantin D.
AU - Podgornykh, Nikolay M.
PY - 2017/11/1
Y1 - 2017/11/1
N2 - The Raman spectra of phosphate minerals: apatite, merrillite, panethite, brianite, czochralskiite, maricite, new phosphate with composition of Na2Fe(Mg,Ca)(PO4)2 and high-pressure phase tuite from the Elga IIE iron meteorite are characterized. Panethite, brianite, czochralskiite and new Na-Fe phosphate were described for the first time. The basic features of all studied phosphates include strong ν1 symmetric stretching mode of PO4 3− ions at 950–990 cm−1, antisymmetric ν3 vibrations in the 1000–1175 cm−1 region and weak bands in the 400–500 cm−1 region, which correspond to ν2 bending mode and in the 550–640 cm−1 region, related to ν4 bending mode. Weak bands at less than 300 cm−1 represent lattice modes. Most of the studied phosphates have three non-equivalent positions of phosphorus atoms in the crystal structures and can be derived from glaserite, K3Na(SO4)2, arrangement. Two or three of non-equivalent [PO4] tetrahedra typically correspond to two or three strong bands in the region of ν1 vibrations. High-pressure mineral tuite has similar composition and was formed after merrillite. P-O vibrations in equivalent [PO4] tetrahedra produce major Raman band of tuite at 972 cm−1. The Elga parent-body experienced a shock pressure of at least 12–15 GPa according to minimum pressures of tuite formation in the static high-pressure experiments. This is the first finding of tuite in iron meteorites and the only second finding of high-pressure mineral in them.
AB - The Raman spectra of phosphate minerals: apatite, merrillite, panethite, brianite, czochralskiite, maricite, new phosphate with composition of Na2Fe(Mg,Ca)(PO4)2 and high-pressure phase tuite from the Elga IIE iron meteorite are characterized. Panethite, brianite, czochralskiite and new Na-Fe phosphate were described for the first time. The basic features of all studied phosphates include strong ν1 symmetric stretching mode of PO4 3− ions at 950–990 cm−1, antisymmetric ν3 vibrations in the 1000–1175 cm−1 region and weak bands in the 400–500 cm−1 region, which correspond to ν2 bending mode and in the 550–640 cm−1 region, related to ν4 bending mode. Weak bands at less than 300 cm−1 represent lattice modes. Most of the studied phosphates have three non-equivalent positions of phosphorus atoms in the crystal structures and can be derived from glaserite, K3Na(SO4)2, arrangement. Two or three of non-equivalent [PO4] tetrahedra typically correspond to two or three strong bands in the region of ν1 vibrations. High-pressure mineral tuite has similar composition and was formed after merrillite. P-O vibrations in equivalent [PO4] tetrahedra produce major Raman band of tuite at 972 cm−1. The Elga parent-body experienced a shock pressure of at least 12–15 GPa according to minimum pressures of tuite formation in the static high-pressure experiments. This is the first finding of tuite in iron meteorites and the only second finding of high-pressure mineral in them.
KW - apatite
KW - iron meteorite
KW - merrillite
KW - phosphate
KW - tuite
KW - MERRILLITE
KW - 6 GPA
KW - CA3(PO4)2
KW - STISHOVITE
KW - CRYSTAL-CHEMISTRY
KW - PRESSURE
KW - WHITLOCKITE
KW - PHASE
KW - DENSE POLYMORPH
KW - MARTIAN METEORITE
UR - http://www.scopus.com/inward/record.url?scp=85012992007&partnerID=8YFLogxK
U2 - 10.1002/jrs.5119
DO - 10.1002/jrs.5119
M3 - Article
AN - SCOPUS:85012992007
VL - 48
SP - 1518
EP - 1527
JO - Journal of Raman Spectroscopy
JF - Journal of Raman Spectroscopy
SN - 0377-0486
IS - 11
ER -
ID: 9957699