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Garnet-to-Perovskite Transition in Gd3Sc2Ga3O12 at High Pressure and High Temperature
Lin CL(林传龙); Liu J(刘景); Lin, CL; Liu, J; Lin, JF; Li, XD; Li, YC; Zhang, QL; Xiong, L; Li, R;; Li YC(李延春); Li XD(李晓东); Xiong L(熊伦)
AbstractThe structural phase transition of gadolinium-scandium-gallium garnet (Gd3Sc2Ga3O12, GSGG) has been studied at high pressure and high temperature using the synchrotron X-ray diffraction technique in a laser-heated diamond anvil cell. The GSGG garnet transformed to an orthorhombic perovskite structure at approximately 24 GPa after laser heating to 1500-2000 K. The garnet-to-perovskite phase transition is associated with an similar to 8% volume reduction and an increase in the coordination number of the Ga3+ or Sc3+ ion. The orthorhombic perovslcite GSGG has bulk modulus B-o = 194(15) GPa with B-o' = 5.3(8), exhibiting slightly less compression than the cubic garnet structure of GSGG with B-o = 157(15) GPa and B-o' = 6.5(10). Upon compression at room temperature, the cubic GSGG garnet became amorphous at similar to 65 GPa. Coupled with the amorphous-to-perovskite phase transition in Y3Fe5O12 and Gd3Ga5O12 at high-pressure-temperature conditions, we conclude that amorphization should represent a new thermodynamic state resulting from hindrance of the garnet-to-perovskite phase transition, whereas the garnet-to-amorphous transition in rare-earth garnets should be kinetically hindered at room temperature.
Subject AreaChemistry
Indexed BySCI
WOS IDWOS:000313220500048
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Document Type期刊论文
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GB/T 7714
Lin CL,Liu J,Lin, CL,et al. Garnet-to-Perovskite Transition in Gd3Sc2Ga3O12 at High Pressure and High Temperature[J]. INORGANIC CHEMISTRY,2013,52(1):431-434.
APA 林传龙.,刘景.,Lin, CL.,Liu, J.,Lin, JF.,...&熊伦.(2013).Garnet-to-Perovskite Transition in Gd3Sc2Ga3O12 at High Pressure and High Temperature.INORGANIC CHEMISTRY,52(1),431-434.
MLA 林传龙,et al."Garnet-to-Perovskite Transition in Gd3Sc2Ga3O12 at High Pressure and High Temperature".INORGANIC CHEMISTRY 52.1(2013):431-434.
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