Electron density in bis(dicarbonyl-.pi.-cyclopentadienyliron) at liquid nitrogen temperature by x-ray and neutron diffraction

1978 ◽  
Vol 100 (11) ◽  
pp. 3390-3397 ◽  
Author(s):  
Andre Mitschler ◽  
Bernard Rees ◽  
Mogens S. Lehmann
Keyword(s):  
Neutron Diffraction ◽  
Liquid Nitrogen ◽  
Electron Density ◽  
Liquid Nitrogen Temperature ◽  
X Ray

INTENSITY OF X-RAY (222) LINE IN InSb AT 77 K UNDER PRESSURE

1989 ◽  
Vol 03 (14) ◽  
pp. 1101-1104
Author(s):  
BIN OKAI ◽  
KAORU J. TAKANO ◽  
JIICHIRO YOSHIMOTO ◽  
HIROKI TAKAHASHI ◽  
ATSUSHI IZAWA ◽  
...  
Keyword(s):  
Liquid Nitrogen ◽  
Structural Transition ◽  
Liquid Nitrogen Temperature ◽  
Abrupt Decrease ◽  
X Ray ◽  
Transition Pressure

The intensity of X-ray (222) line in InSb was measured at liquid nitrogen temperature up to the transition pressure. No abrupt decrease at ca. 3 GPa as reported by Yoder-Short, Colella and Weinstein was observed at 77 K, indicating that a smearing of the bonding charge is not responsible for the structural transition of InSb.

Chemically disordered Ni3Al synthesized by high vacuum evaporation

1991 ◽  
Vol 6 (10) ◽  
pp. 2019-2021 ◽  
Author(s):  
S.R. Harris ◽  
D.H. Pearson ◽  
C.M. Garland ◽  
B. Fultz
Keyword(s):  
Liquid Nitrogen ◽  
Room Temperature ◽  
Single Phase ◽  
High Vacuum ◽  
Liquid Nitrogen Temperature ◽  
Vacuum Evaporation ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Transmission Electron ◽  
Average Grain Size

Films of chemically disordered fcc Ni3Al were synthesized by the vacuum evaporation of Ni3Al onto room temperature and liquid nitrogen temperature substrates. X-ray diffractometry and transmission electron microscopy showed the material to be single phase with an average grain size of about 4 nm. The formation of the equilibrium L12 ordered phase occurred simultaneously with grain growth at temperatures above 350°C. Differential scanning calorimetry provided ordering enthalpies of 7 kJ/mole and 9 kJ/mole for material evaporated onto room temperature and liquid nitrogen temperature substrates, respectively.

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