Nonstoichiometry of ZnGeP{sub 2} crystals probed by static tensimetric method

Journal Article · Wed Sep 15 04:00:00 EDT 2010 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2010.07.034· OSTI ID:21483677

Nikolaev, R E ^[1]; Verozubova, G A ^[2]

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1. Nikolaev Institute of Inorganic Chemistry, Russian Academy of Sciences, Siberian Branch, 3, Acad. Lavrentyev Pr. Novosibirsk 630090 (Russian Federation)
2. Institute of Monitoring of Climatic and Ecological Systems, Russian Academy of Sciences, Siberian Branch, 10/3, Academichesky Pr., Tomsk 634055 (Russian Federation)

Abstracts: The nonstoichiometry of ZnGeP{sub 2} has been determined based on the p-T dependences measured above ZnP{sub 2}-Ge samples in the temperature range of 980-1225 K by a high-sensitive and precise tensimetric static method with a quartz Bourdon gauge. Scanning of the compositional range 49-51 mol% ZnP{sub 2} in the closed system and construction of the p-T dependences were possible due to incongruent evaporation of ZnGeP{sub 2} and formation of volatile species Zn(g), P{sub 4}(g) and P{sub 2}(g). The maximum homogeneity range of the solid ZnGeP{sub 2} was determined between 50.03 and 49.61 mol% ZnP{sub 2} at a temperature of 1128 K, based on the inflection points on the p-T dependences, corresponding to transitions of the three-phase (solid-solid-vapor) equilibrium to a two-phase (solid-vapor) one and vice visa. The nonstoichiometry as the overall concentration of defects is considered to gain a better insight into the defect chemistry of ZnGeP{sub 2}. - Graphical abstract: The nonstoichiometry of ZnGeP{sub 2} on the T-x diagram of the ZnP{sub 2}-Ge system.

• OSTI ID: 21483677
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 9 Vol. 183; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
COHERENT SCATTERING
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
DIAGRAMS
DIFFRACTION
EVAPORATION
FLUIDS
GASES
GERMANIUM COMPOUNDS
INFORMATION
MINERALS
OXIDE MINERALS
PHASE TRANSFORMATIONS
PHOSPHIDES
PHOSPHORUS COMPOUNDS
PNICTIDES
QUARTZ
SCATTERING
SOLIDS
TEMPERATURE RANGE
TEMPERATURE RANGE 0400-1000 K
TEMPERATURE RANGE 1000-4000 K
VAPORS
X-RAY DIFFRACTION
ZINC COMPOUNDS
ZINC PHOSPHIDES