Reaction of hydrogen with the low-temperature form (C15) of TiCr/sub 2/

Journal Article · Wed Nov 01 04:00:00 EST 1978 · Inorg. Chem.; (United States)

DOI:https://doi.org/10.1021/ic50189a027· OSTI ID:6373398

Johnson, J R; Reilly, J J

At -78/sup 0/C the low-temperature form (C15) of the intermetallic compound TiCr/sub 2/ will react directly and reversibly with hydrogen to form two nonstoichiometric hydrides having the nominal compositions of TiCr/sub 1/ /sub 8/H/sub 2/ /sub 6/ and TiCr/sub 1/ /sub 8/H/sub 3/ /sub 6/. Both hydride phases are very unstable having, at -78/sup 0/C, dissociation pressures of approx. 2 and approx. 50 atm, respectively. Relative partial molal quantities for the formation of both hydrides are given. At room temperature, x-ray diffraction data indicate the existence of only one, highly nonstoichiometric hydride, TiCr/sub 1/ /sub 8/H/sub x/, where 2.1 < x < 3.6. This phase is orthorhombic with the lattice parameters varying slightly with hydrogen content. For a composition corresponding to TiCr/sub 1/ /sub 8/H/sub 3/ /sub 42/, a = 7.30, b = 5.18, and c = 4.94 A.

• Research Organization: Brookhaven National Lab., Upton, NY
• OSTI ID: 6373398
• Journal Information: Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 17:11; ISSN INOCA
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
080201* -- Hydrogen-- Chemisorption Storage
36 MATERIALS SCIENCE
360101 -- Metals &amp; Alloys-- Preparation &amp; Fabrication
360102 -- Metals &amp; Alloys-- Structure &amp; Phase Studies
ALLOYS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM COMPOUNDS
CHROMIUM HYDRIDES
COHERENT SCATTERING
CRYOGENIC FLUIDS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIAGRAMS
DIFFRACTION
ELEMENTS
FLUIDS
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN STORAGE
INTERMETALLIC COMPOUNDS
LATTICE PARAMETERS
LOW TEMPERATURE
MEDIUM PRESSURE
MEDIUM TEMPERATURE
NONMETALS
ORTHORHOMBIC LATTICES
PHASE DIAGRAMS
PHASE STABILITY
PRESSURE DEPENDENCE
SCATTERING
STABILITY
STOICHIOMETRY
STORAGE
STRUCTURAL CHEMICAL ANALYSIS
SYNTHESIS
TEMPERATURE DEPENDENCE
TITANIUM ALLOYS
TITANIUM COMPOUNDS
TITANIUM HYDRIDES
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
YIELDS