Phase transitions and high-temperature crystal chemistry of polymorphous modifications of Cs2(UO2)2(MoO4)

2004 ◽  
Vol 46 (5) ◽  
pp. 438-440 ◽  
Author(s):  
E. V. Nazarchuk ◽  
S. V. Krivovichev ◽  
S. K. Filatov
Keyword(s):  
Phase Transitions ◽  
High Temperature ◽  
Crystal Chemistry ◽  
Polymorphous Modifications

High temperature phase transitions and proton conductivity in some kdp-family crystals

1989 ◽  
Vol 100 (1) ◽  
pp. 135-141 ◽  
Author(s):  
A. I. Baranov ◽  
V. P. Khiznichenko ◽  
L. A. Shuvalov
Keyword(s):  
Phase Transitions ◽  
High Temperature ◽  
Proton Conductivity ◽  
High Temperature Phase ◽  
Temperature Phase

The high-temperature P21/m -> C2/m phase transitions in synthetic amphiboles along the richterite-(BMg)-richterite join

2011 ◽  
Vol 96 (2-3) ◽  
pp. 353-363 ◽  
Author(s):  
G. Iezzi ◽  
M. Tribaudino ◽  
G. D. Ventura ◽  
I. Margiolaki
Keyword(s):  
Phase Transitions ◽  
High Temperature ◽  
M Phase

scholarly journals High-temperature phase transitions in dense germanium

2021 ◽  
Vol 154 (17) ◽  
pp. 174702
Author(s):  
Liam C. Kelsall ◽  
Miriam Peña-Alvarez ◽  
Miguel Martinez-Canales ◽  
Jack Binns ◽  
Chris J. Pickard ◽  
...  
Keyword(s):  
Phase Transitions ◽  
High Temperature ◽  
High Temperature Phase ◽  
Temperature Phase

Mössbauer Studies of Fe2+ in Iron Langbeinites and other Crystals with Langbeinite Structure

1998 ◽  
Vol 53 (1-2) ◽  
pp. 27-37 ◽  
Author(s):  
M. Windhaus ◽  
B. D. Mosel ◽  
W. Müller-Warmuth
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
High Temperature ◽  
Low Temperature ◽  
High Spin State ◽  
Cubic Phases ◽  
Debye Temperatures ◽  
Phase Transition Temperatures ◽  
Abrupt Changes ◽  
Temperature Dependences

Abstract 57 Fe Mössbauer spectra have been measured at various temperatures between 4.2 K and 300 K for iron langbeinites A 2 Fe 2^04)3 with A = K, NH 4 , Rb, T1 and magnesium, manganese and cadmium lang-beinites doped with Fe" + . The spectra revealed several contributions whose isomer shifts and quadru-pole splittings have been obtained by fitting program routines. For the high-temperature cubic phases two crystallographically non-equivalent iron sites have been identified, characteristic of Fe2+ in the high-spin state. Abrupt changes of the quadrupole couplings indicated phase transitions; in some cases, the spectra have also revealed several sites for Fe2+ in low temperature phases. From the temperature dependences, phase transition temperatures, crystal field splittings and Debye temperatures have been derived.

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