High-pressure form of(VO)2P2O7: A spin-12antiferromagnetic alternating-chain compound with one kind of chain and a single spin gap

1999 ◽  
Vol 60 (14) ◽  
pp. 10145-10149 ◽  
Author(s):  
M. Azuma ◽  
T. Saito ◽  
Y. Fujishiro ◽  
Z. Hiroi ◽  
M. Takano ◽  
...  
2000 ◽  
Vol 97 (1) ◽  
pp. 205-208
Author(s):  
M. Azuma ◽  
T. Saito ◽  
Z. Hiroi ◽  
M. Takano ◽  
Y. Narumi ◽  
...  

1995 ◽  
Vol 10 (4) ◽  
pp. 293-295 ◽  
Author(s):  
F. Brunet ◽  
C. Chopin ◽  
A. Elfakir ◽  
M. Quarton

A new diffraction pattern of the high-temperature and high-pressure polymorph Mg3(PO4)2-III (PDF 43-500) is given and indexed on the basis of a single-crystal structure refinement. It allows diffractogram indexing of the isostructural high-temperature and high-pressure form of Co3(PO4)2 (PDF 43-499).


2009 ◽  
Vol 182 (11) ◽  
pp. 3085-3090 ◽  
Author(s):  
Shujie You ◽  
Zhi Li ◽  
Liuxiang Yang ◽  
Cheng Dong ◽  
Liangcheng Chen ◽  
...  
Keyword(s):  

1990 ◽  
Vol 183 ◽  
Author(s):  
Lotta permér ◽  
Monica Lundberg

AbstractHREM studies of the low-pressure form of Nb3O7F, obtained by thermal decomposition of NbO2F or by reacting stoichiometric amounts of NbO2F and Nb2O5, confirmed that the crystals are built up of a shear-type structure in which slabs of ReO3 type, infinite in two dimensions and three octahedra wide, separate the shear planes. Most of the crystals were well-ordered, although faults could occasionally be detected. However, some crystals were found to be intergrown with a structure closely related to the high-pressure form of Nb3O7F. The latter structure is composed of wavy rows of edge-sharing NbX7 pentagonal bipyramids, joined to each other by NbX6 octahedra. The connection between the two atomic arrangements can be understood in terms of the common c-axes and a slight distortion of the polyhedra along the boundary.


Nature ◽  
1991 ◽  
Vol 349 (6308) ◽  
pp. 409-411 ◽  
Author(s):  
T. Irifune ◽  
K. Fujino ◽  
E. Ohtani
Keyword(s):  

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