Neutron powder diffraction study of phase transitions and structures of (KCN)/sub x/(KBr)/sub 1-x/ mixed crystals

Journal Article · Thu Sep 15 00:00:00 EDT 1983 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.28.3506· OSTI ID:5557828

Rowe, J M; Rush, J J; Susman, S

The structures of (KCN)/sub x/(KBr)/sub 1-x/ mixed crystals for x = 0.95, 0.90, and 0.80 have been determined as a function of temperature. As the temperature is decreased from 295 K, where all of the samples are cubic (as are pure KCN and KBr), all samples measured transform to a monoclinic structure (space group Cc). For x = 0.95 and 0.90, at a lower temperature there is a further transition to an orthorhombic structure similar to that found for pure KCN below 168 K. However, the samples do not transform completely, and the monoclinic and orthorhombic structures coexist down to 6 K. More of the sample transforms for x = 0.95 than for x = 0.90. In both cases, that part of the sample which goes into the orthorhombic phase orders completely at the lowest temperatures, in a structure similar to that found for pure KCN at 6 K.

• Research Organization: National Measurement Laboratory, National Bureau of Standards, Washington, DC 20234
• OSTI ID: 5557828
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 28:6
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
POTASSIUM BROMIDES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
NEUTRON DIFFRACTION
POTASSIUM COMPOUNDS
CRYSTALS
CUBIC LATTICES
CYANIDES
EXPERIMENTAL DATA
LOW TEMPERATURE
MEDIUM TEMPERATURE
MIXTURES
MONOCLINIC LATTICES
ORTHORHOMBIC LATTICES
POWDERS
TEMPERATURE DEPENDENCE
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
ALKALI METAL COMPOUNDS
BROMIDES
BROMINE COMPOUNDS
COHERENT SCATTERING
CRYSTAL LATTICES
DATA
DIFFRACTION
DISPERSIONS
HALIDES
HALOGEN COMPOUNDS
INFORMATION
NUMERICAL DATA
PHASE TRANSFORMATIONS
SCATTERING
360602* - Other Materials- Structure & Phase Studies