Thermocrystallography of higher hydrides of titanium and zirconium

Journal Article · Tue Dec 31 23:00:00 EST 1957 · Acta Crystallographica

DOI:https://doi.org/10.1107/S0365110X58000098· OSTI ID:4339534

Yakel, H. L.

Low- and high-temperature x-ray diffraction investigations of titanium dihydride (TiH_1.99) and dideuteride (TiD_1.98) have indicated apparent 'second-order transformations' in both substances below a critical temperature of 310 deg K. The tetragonal low-temperature phases are distortions of the cubic fluorite high-temperature phases, and are isomorphous with the tetragonal ZrH₂ structure. A similar study of zirconium dihydride (ZrH_1.92) has shown that the tetragonality of the lattice of this substance is also temperature- dependent. The critical temperature of the second-order transformation' in ZrH_1.92 is unattainable in the present diffraction apparatus owing to dissociation of the hydride. Possible causes of the transformations are discussed.

• Research Organization: Oak Ridge National Lab., Tenn.
• Sponsoring Organization: USDOE
• NSA Number: NSA-12-005252
• OSTI ID: 4339534
• Journal Information: Acta Crystallographica, Journal Name: Acta Crystallographica Journal Issue: 1 Vol. 11; ISSN ACCRA9; ISSN 0365-110X
• Publisher: International Union of Crystallography
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
AMMONIUM COMPOUNDS
CONTROL ELEMENTS
CONTROL SYSTEMS
CRYSTALS
DEUTERIUM COMPOUNDS
DIFFRACTION
HIGH TEMPERATURE
IONIZATION CHAMBERS
LATTICES
LOW TEMPERATURE
MONITORING
PRESSURE
REACTOR CORE
REACTORS
RODS
SOLUTIONS
TEMPERATURE
TITANIUM HYDRIDES
TUBES
VESSELS
VOLATILITY
WATER
X RADIATION
ZIRCONIUM HYDRIDES