0000000000846556

AUTHOR

B. Kosturek

showing 5 related works from this author

Optical investigation of phase transitions in Di(Tetraethylammonium) pentachloroantimonate(III) [N(C2H5)4]2SbCl5

1997

Abstract Spontaneous changes of linear birefringence in the [N(C2H5)4]2SbCl5 crystal were measured in the temperature range 200–500 K. Presence of two phase transitions at 219 K (monoclinic to orthorhombic) and at 347 K (orthorhombic to tetragonal) was confirmed. Two new phase transitions were found: -at 438 K (tetragonal to tetragonal) and at 467 K -to cubic phase.

Phase transitionMaterials scienceBirefringencebusiness.industryAtmospheric temperature rangeCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsCrystalTetragonal crystal systemCrystallographyOpticsPhase (matter)Orthorhombic crystal systembusinessMonoclinic crystal systemFerroelectrics
researchProduct

Structure and phase transitions in the ferroelastic [C(NH2)3]3Bi2Br9crystal

1999

Differential scanning calorimetry, dilatometric, dielectric and linear birefringence measurements have been used to study the ferroelastic [C(NH2)3]3Bi2Br9 crystal. The x-ray studies showed that it crystallizes at room temperature in the monoclinic symmetry, space group P21/m. The crystal undergoes a complex sequence of phase transitions: at 311 K, 333.5 K, 350 K, 415 K and 425 K. All phase transitions were found to be of first order type. The ferroelastic domain structure is maintained from room temperature up to 425 K. The temperature measurements of the linear birefringence and optical observations suggest the tetragonal symmetry of the parent paraelastic phase above 425 K.

CrystalPhase transitionCrystallographyTetragonal crystal systemDifferential scanning calorimetryBirefringenceChemistryPhase (matter)General Materials ScienceDielectricCrystal structureCondensed Matter PhysicsJournal of Physics: Condensed Matter
researchProduct

Crystal structure, phase transitions and ferroelastic properties of [(CH3)2NH2]3[Bi2Cl9]

2003

Abstract A sequence of structural phase transitions in [(CH3)2NH2]3[Bi2Cl9] (DMACB) is established on the basis of differential scanning calorimetry (DSC) and dilatometric studies. Four phase transitions are found: at 367/369, 340/341, 323/325 and 285/292 K (on cooling/heating). The crystal structure of DMACB is determined at 350 K. It crystallizes in monoclinic space group P21/n: a=8.062(2), b=21.810(4), c=14.072(3) A, β=92.63(3)°, Z=4, R1=0.0575, wR2=0.1486. The crystal is built of the double chain anions (“pleated ribbon structure”) and the dimethylammonium cations. Dielectric studies in the frequency range 75 kHz–900 MHz indicate relatively fast reorientation of the dimethylammonium cat…

Phase transitionChemistryRibbon diagramInfrared spectroscopyCrystal structureAtmospheric temperature rangeCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsInorganic ChemistryCrystalCrystallographyDifferential scanning calorimetryMaterials ChemistryCeramics and CompositesPhysical and Theoretical ChemistryMonoclinic crystal systemJournal of Solid State Chemistry
researchProduct

CCDC 189320: Experimental Crystal Structure Determination

2004

Related Article: M.Wojtas, G.Bator, R.Jakubas, J.Zaleski, B.Kosturek, J.Baran|2003|J.Solid State Chem.|173|425|doi:10.1016/S0022-4596(03)00137-3

Space GroupCrystallographycatena-(tris(Dimethylammonium) tris(mu~2~-chloro)-hexachloro-di-bismuth)Crystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
researchProduct

CCDC 607733: Experimental Crystal Structure Determination

2006

Related Article: R.Jakubas, J.Zaleski, B.Kosturek, G.Bator|1999|J.Phys.:Condens.Matter|11|4731|doi:10.1088/0953-8984/11/24/314

Space GroupCrystallographytris(Guanidinium) tris(mu~2~-bromo)-hexabromo-di-bismuth(iii)Crystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
researchProduct