Gaseous calcium, strontium, and barium phosphites

Journal Article · Mon Sep 01 04:00:00 EDT 1986 · Dokl. Phys. Chem. (Engl. Transl.); (United States)

OSTI ID:5797536

Lopatin, S I; Semenov, G A

The authors investigated the composition of the vapor over calcium, strontium, and barium orthophosphates in the temperature range of 1900-2500/sup 0/K. The study was carried out on an MS-1301 mass spectrometer; the vaporization was carried out from molybdenum Knudsen chambers. The heating was carried out by electron bombardment, and the temperature was measured with an EOP-66 optical pyrometer. The ions Me/sup +/, MeO/sup +/, MePO/sub 2//sup +/ (Me = Ca, Sr, Ba), PO/sup +/ and PO/sub 2//sup +/ with a 1:100 PO/sub 2//sup +//PO/sup +/ ratio were recorded in the mass spectra of the vapor over calcium, strontium, and barium orthophosphates at 2000-2500/sup 0/K. The appearance potentials of the main ions of the mass spectra were measured by means of the disappearance of the ion current. The potential scale was calibrated according to the appearance potentials (Au/sup +/). Typical mass spectra of the vapor over the calcium, strontium, and barium orthophosphates and the appearance potentials of the ions are given.

• Research Organization: A. A. Zhdanov Leningrad State Univ., USSR
• OSTI ID: 5797536
• Journal Information: Dokl. Phys. Chem. (Engl. Transl.); (United States), Journal Name: Dokl. Phys. Chem. (Engl. Transl.); (United States) Vol. 287:1-3; ISSN DKPCA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603 -- Materials-- Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
640304 -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALINE EARTH METAL COMPOUNDS
ATOMIC IONS
BARIUM COMPOUNDS
BARIUM PHOSPHATES
BEAMS
CALCIUM COMPOUNDS
CALCIUM PHOSPHATES
CALIBRATION
CHARGED PARTICLES
COLLISIONS
DISSOCIATION
ELECTRON BEAMS
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ENTHALPY
EVAPORATION
FLUIDS
FORMATION HEAT
GASES
IONIZATION
IONIZATION POTENTIAL
IONS
LEPTON BEAMS
MASS SPECTRA
MOLECULAR IONS
MOLECULE COLLISIONS
OXYGEN COMPOUNDS
PARTIAL PRESSURE
PARTICLE BEAMS
PHASE TRANSFORMATIONS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PHYSICAL PROPERTIES
REACTION HEAT
SPECTRA
STRONTIUM COMPOUNDS
STRONTIUM PHOSPHATES
THERMODYNAMIC PROPERTIES
TRANSITION HEAT
VAPOR PRESSURE
VAPORIZATION HEAT
VAPORS