About: Preservation of samarskite structure in a metamict ABO4 mineral: a key to crystal structure identification     Goto   Sponge   NotDistinct   Permalink

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  • Relics of the original samarskite structure were identified in a metamict ABO4 mineral from Beinmyr pegmatite, Norway, using selected area electron diffraction (SAED) and high-resolution transmission electron microscopy (HRTEM). The chemical composition of the sample confirmed the affiliation to the samarskite group giving general formula (REE0.322Ca0.269Fe0.231U0.142Mn0.031Pb0.011Th0.010Zr0.010Al0.004Sc0.002Na0.001K0.001)1.034(Nb0.707Ta0.267Ti0.069W0.017Sn0.007)1.067O4 which corresponds well to the general ABO4 stoichiometry of the samarskite group. The structure identified by transmission electron microscopy (TEM) techniques is well related to the proposed low-temperature samarskite modification (Sugitani et al. 1985) crystallizing in Pbcn space group with the cell parameters a=5.69(2) A, b=4.91(2) A, c=5.21(2) A. The original mineral sample showed to be X-ray amorphous.
  • Relics of the original samarskite structure were identified in a metamict ABO4 mineral from Beinmyr pegmatite, Norway, using selected area electron diffraction (SAED) and high-resolution transmission electron microscopy (HRTEM). The chemical composition of the sample confirmed the affiliation to the samarskite group giving general formula (REE0.322Ca0.269Fe0.231U0.142Mn0.031Pb0.011Th0.010Zr0.010Al0.004Sc0.002Na0.001K0.001)1.034(Nb0.707Ta0.267Ti0.069W0.017Sn0.007)1.067O4 which corresponds well to the general ABO4 stoichiometry of the samarskite group. The structure identified by transmission electron microscopy (TEM) techniques is well related to the proposed low-temperature samarskite modification (Sugitani et al. 1985) crystallizing in Pbcn space group with the cell parameters a=5.69(2) A, b=4.91(2) A, c=5.21(2) A. The original mineral sample showed to be X-ray amorphous. (en)
Title
  • Preservation of samarskite structure in a metamict ABO4 mineral: a key to crystal structure identification
  • Preservation of samarskite structure in a metamict ABO4 mineral: a key to crystal structure identification (en)
skos:prefLabel
  • Preservation of samarskite structure in a metamict ABO4 mineral: a key to crystal structure identification
  • Preservation of samarskite structure in a metamict ABO4 mineral: a key to crystal structure identification (en)
skos:notation
  • RIV/00216224:14310/10:00040601!RIV11-AV0-14310___
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  • 3
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  • 281447
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  • RIV/00216224:14310/10:00040601
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  • samarskite; low-temperature modification; metamictisation; pre-metamict structure (en)
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  • DE - Spolková republika Německo
http://linked.open...ontrolniKodProRIV
  • [3423A8AF1EA2]
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  • European Journal of Mineralogy
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  • 22
http://linked.open...iv/tvurceVysledku
  • Škoda, Radek
  • Bermanec, Vladimir
  • Gajović, Andreja
  • Linarić, Maša Rajić
  • Su, Dang Sheng
  • Tomašić, Nenad
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  • 0935-1221
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  • 14310
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