STRUCTURAL TRANSFORMATION OF ZIRCONIUM PHOSPHIDE

Journal Article · Tue Oct 01 04:00:00 EDT 1963 · Phys. Chem. Solids

DOI:https://doi.org/10.1016/0022-3697(63)90231-2· OSTI ID:4163599

Irani, K S; Gingerich, K A

Structural investigations were made on the phosphides of zirconium, with reference to the phosphides of the transition metal family Ti, Zr, and Hf. For the hexagonal form of BETA -ZrP, the unit cell expansion as a function of temperature was determined, using high-temperature x-ray diffraction. The transformation from the hexagonal BETA -form to the f.c.c. alpha -form at elevated temperatures was investigated. The unit cell dimensions of the hexagonal BETA -ZrP are found to increase linearly with temperature, until at a critical value in vacuum there is a slight decrease in phosphorus content and the cell suddenly collapses to the more stable cubic alpha -ZrP. The constancy of the hexagonal c/a value until its sudden fall to unity, for the cubic form, is indicative of a cooperative first order type of transformation. Mass spectrometric techniques were also used to study this transformation. A structural model is given to explain this transition that is a function of both temperature and pressure, involving a alight stoichiometry change. The relative high temperature stabilities are TiP < ZrP < HfP. (auth)

• Research Organization: Pennsylvania State Univ., University Park
• NSA Number: NSA-18-000234
• OSTI ID: 4163599
• Journal Information: Phys. Chem. Solids, Journal Name: Phys. Chem. Solids Vol. Vol: 24
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CHEMISTRY
CONFIGURATION
CRYSTALS
DIFFRACTION
ELECTRONS
ENERGY LEVELS
EXPANSION
HAFNIUM COMPOUNDS
HIGH TEMPERATURE
HYDROGEN
LATTICES
MALONIC ACID
MASS SPECTROMETERS
NUCLEAR MODELS
ORGANIC ACIDS
PHOSPHIDES
PHOSPHORUS COMPOUNDS
POTASSIUM
PRESSURE
QUANTITATIVE ANALYSIS
REACTION KINETICS
RESONANCE
SPIN
STABILITY
TEMPERATURE
TESTING
TITANIUM COMPOUNDS
X RADIATION
ZIRCONIUM COMPOUNDS