ChemInform Abstract: Crystal Chemistry of Anion-Excess ReO3-Related Phases. Part 3. γ-ZrF4, a High-Pressure Form of Zirconium Tetrafluoride, and a Comparison of MX4Structure Types.

ChemInform ◽  
2014 ◽  
Vol 45 (41) ◽  
pp. no-no
Author(s):  
Jean-Paul Laval
Keyword(s):  
High Pressure ◽  
Crystal Chemistry ◽  
Zirconium Tetrafluoride ◽  
Pressure Form

Crystal chemistry of anion-excess ReO3-related phases. III.

2014 ◽  
Vol 70 (8) ◽  
pp. 742-748 ◽  
Author(s):  
Jean-Paul Laval
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
High Temperature ◽  
Crystal Chemistry ◽  
Three Dimensional ◽  
Structure Type ◽  
Ionic Structure ◽  
Zirconium Tetrafluoride

The crystal structure of the high-pressure (4–8 GPa) form of zirconium tetrafluoride, γ-ZrF4, is based on the association by corner- and edge-sharing of ZrF8triangulated dodecahedra, forming a three-dimensional framework. It presents some analogies with high-temperature α-ZrF4but clearly constitutes a newMX4structure type. The mainMX4ionic structure types, and especially those deriving from the `anion-excess ReO3-type', are compared and it is shown that the TeF4structure can also be included in this family.

Crystal chemistry of lead aluminosilicate hollandite; a new high-pressure synthetic phase with octahedral Si

1995 ◽  
Vol 80 (9-10) ◽  
pp. 937-940 ◽  
Author(s):  
Robert T. Downs ◽  
Robert M. Hazen ◽  
Larry W. Finger ◽  
Tibor Gasparik
Keyword(s):  
High Pressure ◽  
Crystal Chemistry ◽  
Synthetic Phase

Crystal and powder XRD data of Mg3(PO4)2-III: High-temperature and high-pressure form

1995 ◽  
Vol 10 (4) ◽  
pp. 293-295 ◽  
Author(s):  
F. Brunet ◽  
C. Chopin ◽  
A. Elfakir ◽  
M. Quarton
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
High Temperature ◽  
Single Crystal ◽  
Diffraction Pattern ◽  
Structure Refinement ◽  
Powder Xrd ◽  
Single Crystal Structure ◽  
Crystal Structure Refinement ◽  
Pressure Form

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).

High-Pressure Synthesis, Crystal Chemistry, and Ionic Conductivity of a Structural Polymorph of Li3BP2O8

2018 ◽  
Vol 57 (24) ◽  
pp. 15048-15050
Author(s):  
Eiichi Hirose ◽  
Kunimitsu Kataoka ◽  
Hiroshi Nagata ◽  
Junji Akimoto ◽  
Takuya Sasaki ◽  
...  
Keyword(s):  
High Pressure ◽  
Ionic Conductivity ◽  
Crystal Chemistry ◽  
High Pressure Synthesis ◽  
Pressure Synthesis

High-Resolution Electron Microscopy Studies of Faults and Intergrowth in Nb3O7F

1990 ◽  
Vol 183 ◽  
Author(s):  
Lotta permér ◽  
Monica Lundberg
Keyword(s):  
Electron Microscopy ◽  
Thermal Decomposition ◽  
High Pressure ◽  
High Resolution Electron Microscopy ◽  
Two Dimensions ◽  
Resolution Electron ◽  
Shear Type ◽  
Pressure Form ◽  
The Common ◽  
Shear Planes

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.

scholarly journals High-Pressure Syntheses and Crystal Chemistry of Postperovskite-Type Oxides and Fluorides

2014 ◽  
Vol 24 (3) ◽  
pp. 204-211
Author(s):  
Hiroshi KOJITANI ◽  
Yuichi SHIRAKO ◽  
Hitoshi YUSA ◽  
Masaki AKAOGI
Keyword(s):  
High Pressure ◽  
Crystal Chemistry
Sign in / Sign up

Export Citation Format

Share Document