Can I read From a Three- to a Four-Connected Net in Trimorphic CaPtSi at High Pressure on EtoBox?

From a Three- to a Four-Connected Net in Trimorphic CaPtSi at High Pressure by Jürgen Evers; Gilbert Oehlinger; Kurt Polborn; Bernd Sendlinger is a Materials Science article available to read on EtoBox.

What is From a Three- to a Four-Connected Net in Trimorphic CaPtSi at High Pressure about?

\(\mathrm{CaPtSi}\), midway between the \(\mathrm{Zintl}\) phase \(\mathrm{CaSi}_{2}\) and the Laves phase \(\mathrm{CaPt}_{2}\), crystallizes at normal pressure in the LaIrSi-type structure, a derivative of the \(\mathrm{SrSi}_{2}\)-type structure. Two quenchable polymorphs have been obtained from this phase in a belt apparatus at high pressures ( \(3-4 \mathrm{GPa}\) ) and high temperatures \(\left(800-1100^{\circ} \mathrm{C}\right)\). The first high pressure polymorph (EuNiGe-type structure, \(m P 12, P 2_{1} /\) \(\mathrm{n}, a=588.9(1), b=581.0(1), c=724.3(1) \mathrm{pm}, \beta=109.25(1)^{\circ}\). Rietveld technique) is \(7.3 \%\), the second (TiNiSi-type structure, \(o P 12\), Pnma, \(a=711.5(1), b=433.6(1), c=723.2(1)\), single crystal investigation) \(11.6 \%\) more densely packed than the normal pressure phase. The denser packing is correlated with increases of coordination, bond distances. and metallic properties. The transformation from the LalrSi- into the TiNiSi-type structure results in a change from a three-dimensional threeconnected (Pt-Si: \(230 \mathrm{pm}\) ) into a three-dimensional four-connected net (averaged Pt-Si: \(254 \mathrm{pm}\) ). The phases of trimor

Who reads From a Three- to a Four-Connected Net in Trimorphic CaPtSi at High Pressure?

Author

Jürgen Evers; Gilbert Oehlinger; Kurt Polborn; Bernd Sendlinger

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0022-4596)

Published

1993

Language

EN

Field

Materials Science (Physical Sciences)