3D mineralogical mapping of the Kovdor phoscorite–carbonatite complex (Russia)     

Julia A. Mikhailova  Andrey O. Kalashnikov  Victor A. Sokharev  Yakov A. Pakhomovsky  Nataly G. Konopleva  Victor N. Yakovenchuk  Ayya V. Bazai  Pavel M. Goryainov  Gregory Yu. Ivanyuk 《Mineralium Deposita》2016,51(1):131-149

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Batagayite,CaZn2(Zn,Cu)6(PO4)4(PO3OH)3·12H2O,a new phosphate mineral from Këster tin deposit (Yakutia,Russia): occurrence and crystal structure     

Yakovenchuk  Victor N.  Pakhomovsky  Yakov A.  Konopleva  Nataliya G.  Panikorovskii  Taras L.  Bazai  Ayya  Mikhailova  Julia A.  Bocharov  Vladimir N.  Ivanyuk  Gregory Yu.  Krivovichev  Sergey V. 《Mineralogy and Petrology》2018,112(4):591-601

Mineralogy and Petrology - Batagayite, CaZn2(Zn,Cu)6(PO4)4(PO3OH)3·12H2O, is a new secondary phosphate mineral from the Këster deposit, Arga-Ynnykh-Khai massif, NE Yakutia, Russia. It is...  相似文献   

High-pressure single-crystal X-ray diffraction and synchrotron Mössbauer study of monoclinic ferrosilite     

Natalia V. Solomatova  Ayya Alieva  Gregory J. Finkelstein  Wolfgang Sturhahn  Michael B. Baker  Christine M. Beavers  Jiyong Zhao  Thomas S. Toellner  Jennifer M. Jackson 《Comptes Rendus Geoscience》2019,351(2-3):129-140

The phase and spin transitions in single-crystal monoclinic ferrosilite, FeSiO₃, were investigated using X-ray diffraction and Mössbauer spectroscopy up to lower-mantle pressures and room temperature in a helium pressure medium. Using single-crystal X-ray diffraction, we measured the equation of state of ferrosilite up to about 43 GPa. We observed a P2₁/c-to-C2/c phase transition between 1.5 and 1.7 GPa and a phase transition from C2/c to a distinct P2₁/c structure between 30 and 34 GPa. With time-domain Mössbauer spectroscopy, we determined the hyperfine parameters of ferrous iron up to 95 GPa. The phase transitions were correlated with discontinuities in Mössbauer spectral features. We observed the onset of high-spin-to-low-spin transitions in the M1 and M2 sites at ～37 GPa and ～74 GPa, respectively. Understanding the electronic structure of iron in a well-characterized single crystal of ferrosilite may help interpret the behavior of iron in complex dense silicate phases.  相似文献