Effect of pressure on solid-solid transitions in some silver and cuprous chalcogenides
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iv ABSTRACTS OF PAPERS TO APPEAR IN J. PHYS. CHEM. SOLIDS Vol.7, No.18 (1150°C, 1300°C, 1450°C)by neutron diffraction. J.B. Clark and E. Rapoport, Chemical The variation of the maximum of i(k) with tem- Physics Group of the National Physical perature has been studied from 1086°Cto 1492°C and National Chemical Research and shows a linear dependence with lIT. The Laboratories, South African Council for pair distribution function g(r) and the direct Scientific and Industrial Research, correlation function c(r) have been obtained by P.O. Box 395, Pretor’ia, South Africa Fourier transformation and the pair potentiel V(r) was derived from these using the Percus— Phase transitions in Ag 2 S, Ag2Se, Ag2Te, Yevick and hypernetted chain equations. These Cu2S and Cu2Se were studied by differential two approximations are not applicable to liquid thermal analysis (DTA) to 40kbar. The transition copper but the repulsive part of the potential is temperature lines increase with pressure with in good agreement with a hard sphere model of initial slopes of 1.57, 6, 11.48, and 0.5°C/kbar, core a = 2.2A. respectively, for the first four and —0.6°C/kbar Received 18 February 1969 for (probably copper-deficient) Cu2Se. Revised 3 June 1969 Received 9 May 1969 Revised 30 June 1969 11. EFFECT OF PRESSURE ON SOLID— SOLID TRANSITIONS IN SOME SILVER AND CUPROUS CHALCO- GENIDES
Transcript of Effect of pressure on solid-solid transitions in some silver and cuprous chalcogenides
iv ABSTRACTSOF PAPERSTO APPEAR IN J. PHYS. CHEM. SOLIDS Vol.7, No.18
(1150°C,1300°C,1450°C)by neutrondiffraction. J.B. Clark andE. Rapoport,ChemicalThe variationof the maximum of i(k) with tem- PhysicsGroupof the National Physicalperaturehasbeenstudiedfrom 1086°Cto 1492°C and NationalChemicalResearchand showsa linear dependencewith lIT. The Laboratories,South African Council forpair distribution functiong(r) and thedirect Scientific and IndustrialResearch,correlationfunction c(r) havebeenobtainedby P.O. Box 395, Pretor’ia, SouthAfricaFouriertransformationand the pair potentielV(r) wasderivedfrom theseusingthe Percus— Phasetransitionsin Ag2 S, Ag2Se,Ag2Te,Yevick and hypernettedchainequations.These Cu2Sand Cu2Sewerestudiedby differentialtwo approximationsarenot applicableto liquid thermal analysis(DTA) to 40kbar. The transitioncopperbut the repulsivepart of the potential is temperaturelines increasewith pressurewithin good agreementwith a hardspheremodel of initial slopesof 1.57, 6, 11.48, and0.5°C/kbar,corea = 2.2A. respectively,for the first four and—0.6°C/kbar
Received18 February1969 for (probablycopper-deficient)Cu2Se.
Revised3 June1969 Received9 May 1969
Revised30 June196911. EFFECT OF PRESSUREON SOLID—
SOLID TRANSITIONS IN SOMESILVER AND CUPROUSCHALCO-GENIDES
