ChemInform Abstract: Single-Crystal X-Ray Diffraction Investigation of the Reversible Order-Disorder Phase Transition in Iron-Deficient TlFe2-xSe2.

ChemInform ◽  
2014 ◽  
Vol 45 (19) ◽  
pp. no-no
Author(s):  
E. Ahrens ◽  
F. Nitsche ◽  
Th. Doert ◽  
M. Ruck
Keyword(s):  
Phase Transition ◽  
Single Crystal ◽  
X Ray Diffraction ◽  
X Ray ◽  
Disorder Phase Transition ◽  
Iron Deficient

X-ray Diffraction Study of Order–Disorder Phase Transition in CuMPt6 (M=3d Elements) Alloys

2009 ◽  
Vol 78 (1) ◽  
pp. 014601 ◽  
Author(s):  
Ejaz Ahmed ◽  
Miwako Takahashi ◽  
Hiroshi Iwasaki ◽  
Ken-ichi Ohshima
Keyword(s):  
Phase Transition ◽  
Diffraction Study ◽  
X Ray Diffraction ◽  
X Ray ◽  
Disorder Phase Transition ◽  
3D Elements

A new high-pressure phase transition in clinoferrosilite: In situ single-crystal X-ray diffraction study

2017 ◽  
Vol 102 (3) ◽  
pp. 666-673 ◽  
Author(s):  
Anna Pakhomova ◽  
Leyla Ismailova ◽  
Elena Bykova ◽  
Maxim Bykov ◽  
Tiziana Boffa Ballaran ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Single Crystal ◽  
Diffraction Study ◽  
High Pressure Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
High Pressure Phase Transition ◽  
Pressure Phase

Low-temperature phase transition in glycine–glutaric acid co-crystals studied by single-crystal X-ray diffraction, Raman spectroscopy and differential scanning calorimetry

2012 ◽  
Vol 68 (3) ◽  
pp. 287-296 ◽  
Author(s):  
Boris A. Zakharov ◽  
Evgeniy A. Losev ◽  
Boris A. Kolesov ◽  
Valeri A. Drebushchak ◽  
Elena V. Boldyreva
Keyword(s):  
Phase Transition ◽  
Differential Scanning Calorimetry ◽  
Raman Spectroscopy ◽  
Single Crystal ◽  
Glutaric Acid ◽  
Group Symmetry ◽  
Temperature Phase ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray

The occurrence of a first-order reversible phase transition in glycine–glutaric acid co-crystals at 220–230 K has been confirmed by three different techniques – single-crystal X-ray diffraction, polarized Raman spectroscopy and differential scanning calorimetry. The most interesting feature of this phase transition is that every second glutaric acid molecule changes its conformation, and this fact results in the space-group symmetry change from P21/c to P\bar 1. The topology of the hydrogen-bonded motifs remains almost the same and hydrogen bonds do not switch to other atoms, although the hydrogen bond lengths do change and some of the bonds become inequivalent.

Conformational transformation coupled with the order–disorder phase transition in 2-methyl-1,3-cyclohexanedione crystals

2000 ◽  
Vol 56 (5) ◽  
pp. 872-881 ◽  
Author(s):  
Andrzej Katrusiak
Keyword(s):  
Phase Transition ◽  
Chair Conformation ◽  
Continuous Phase ◽  
Conformational Transformation ◽  
X Ray Diffraction ◽  
Ring Conformation ◽  
X Ray ◽  
Disorder Phase Transition ◽  
Methylene Groups ◽  
Large Amplitude Vibrations

The half-chair conformation of the dynamically disordered molecular ring of 2-methyl-1,3-cyclohexanedione, C_7H_{10}O_2, transforms to a sofa below T_c = 244 K, when the crystal undergoes a continuous phase transition induced by the onset of halting large-amplitude vibrations of methylene groups C(4)H_2 and C(5)H_2. The temperature dependence of the crystal structure has been investigated by X-ray diffraction. The Ibam symmetry of the crystal reduces below T_c to space group Pccn. The mechanism of the phase transition and of the conversion of the ring conformation is discussed.

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