Crystal structure of the high-pressure phase of the oxonitridosilicate chloride Ce4[Si4O3 + xN7 - x]Cl1 - xOx' x ≃ 0.2
Crystal structure of the high-pressure phase of the oxonitridosilicate chloride Ce4[Si4O3 + xN7 - x]Cl1 - xOx' x ≃ 0.2
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氧氮硅酸盐氯化物高压相的晶体结构 Ce4[Si4O3 xN7 - x]Cl1 - xOx x â 0 2
DOI:
10.1107/s0108768106003302
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发表时间:
--
期刊:
影响因子:
--
通讯作者:
W. Schnick
中科院分区:
文献类型:
--
作者:
A. Friedrich;E. Haussühl;W. Morgenroth;A. Lieb;B. Winkler;K. Knorr;W. Schnick
The structural compression mechanism of Ce4[Si4O3 + xN7 − x]Cl1 − xOx, x ≃ 0.2, was investigated by in situ single-crystal synchrotron X-ray diffraction at pressures of 3.0, 8.5 and 8.6 GPa using the diamond–anvil cell technique. On increasing pressure the low-pressure cubic structure first undergoes only minor structural changes. Between 8.5 and 8.6 GPa a first-order phase transition occurs, accompanied by a change of the single-crystal colour from light orange to dark red. The main structural mechanisms, leading to a volume reduction of about 5% at the phase transition, are an increase in and a rearrangement of the Ce coordination, the loss of the Ce2, Ce3 split position, and a bending of some of the inter-polyhedral Si—N—Si angles in the arrangement of the corner-sharing Si tetrahedra. The latter is responsible for the short c axis of the orthorhombic high-pressure structure compared with the cell parameter of the cubic low-pressure structure.
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影响因子:
2.8
作者:
B. Winkler;M. Hytha;Ute Hantsch;V. Milman
通讯作者:
V. Milman
DOI:
--
发表时间:
1978
期刊:
影响因子:
--
作者:
L. Finger;H. King
通讯作者:
H. King
影响因子:
3.3
作者:
A. Lieb;M. T. Weller;P. F. Henry;R. Niewa;R. Pöttgen;R.-D. Hoffmann;H. E. Höfer;W. Schnick
通讯作者:
W. Schnick
DOI:
10.1524/zkri.220.2.245.59127
发表时间:
2005
期刊:
Zeitschrift für Kristallographie - Crystalline Materials
影响因子:
--
作者:
A. Friedrich;K. Knorr. A. Lieb;S. Rath;M. Hanfland;B. Winkler;W. Schnick
通讯作者:
W. Schnick