Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-26T06:39:47.071Z Has data issue: false hasContentIssue false
  • English
  • Français

Two synthetic compounds containing chromium in different valency states

Published online by Cambridge University Press:  14 March 2018

W. Johnson
W. Johnson*
Affiliation:
The United Steel Companies Limited, Research and Development Dept., Swinden Laboratories, Moorgate, Rotherham, Yorkshire
Get access Rights & Permissions [Opens in a new window]

Summary

Two compounds, one an apatite and the other a perovskite, have been synthesized by sintering mixtures containing CaO and Cr2O3, and CaO, Cr2O3, and Fe2O3 respectively. The apatite formed by partial oxidation of the Cr2O3 and subsequent pick-up of moisture from the atmosphere, to give Ca5(CrO4)3OH. The perov-skite formed as a non-stoicheiometric compound Ca4(Fe,Cr)4O11 by partial oxidation of the Cr2O3 during firing. Lattice parameters and interplanar spacings are given for the two structures.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 32 , Issue 248 , March 1960 , pp. 408 - 411
Copyright
Copyright © 1960, The Mineralogical Society

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bertaut, (F.F.), Blum, (P.), and Sagnières, (A.), 1959. Acta Cryst., vol. 12, p. 149.CrossRefGoogle Scholar
Cockbain, (A.G.) and Johnson, (W.), 1958. Trans. Brit. Ceram. Sot., vol 57, p. 511.Google Scholar
Geller, (S.), 1956. Journ. Chem. Physics, vol. 24, p. 1236.CrossRefGoogle Scholar
Glasser, (F.P.) and Osborn, (E.F.), 1958. Journ. Amer. Ceram. Soc., vol. 41, no. 9, p. 358.CrossRefGoogle Scholar
Körber, (F.) and Trömel, (G.), 1933-4.Archly Eisenhuttenwesen, vol. 7, p. 7.Google Scholar
Minguzzi, (C.), 1941. Periodico Min., vol. 19, p. 343.Google Scholar
Newkirk, (T.F.) and Thwaite, (R.D.), 1958. Journ. Res. Nat. Bur. Stand., vol. 61, p. 233. R.P. 2900.CrossRefGoogle Scholar
Roy, (R.), 1954. Journ. Amer. Ceram. Soc., vol. 37, no. 12, p. 581.CrossRefGoogle Scholar