Temperature-Pressure Phase Relationships in Niobium Pentoxide.
Temperature-Pressure Phase Relationships in Niobium Pentoxide.
复制标题
五氧化二铌中的温度-压力相位关系。
DOI：
10.6028/jres.077a.042
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发表时间：
1973
期刊：
影响因子：
--
通讯作者：
H. S. Parker
中科院分区：
文献类型：
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作者：
J. Waring;Robert S. Roth;H. S. Parker
测定了Nb_2 O_5的相平衡图的压力-温度（P-T）截面。四个单相区，H-Nb 2 O 5，B-Nb 2 O 5，和两个L-Nb 2 O 5区，其特征在于由X射线粉末衍射数据。L-Nb_2 O_5的超结构是基于与L-Ta_2 O_5的已知超结构的相似性而索引的，并且用单晶电子衍射数据来证实。正确的晶胞是斜方晶系，a = 6.168，B = 29.312，c = 3.938 μ m，B轴是子晶胞的8倍（8 × 3.664 μ m）。
A pressure-temperature (P-T) section of the phase equilibrium diagram for Nb2O5 has been determined. Four single phase regions, H-Nb2O5, B-Nb2O5, and two L-Nb2O5 areas, were characterized by x-ray powder diffraction data. The superstructure of L-Nb2O5 was indexed on the basis of similarities to the known superstructures of L-Ta2O5 and confirmed with single crystal electron diffraction data. The correct unit cell is orthorhombic with a = 6.168, b = 29.312, c = 3.938 Å, with the b axis 8 times the subcell (8 × 3.664 Å).