Hostname: page-component-586b7cd67f-t7czq Total loading time: 0 Render date: 2024-11-23T04:17:32.475Z Has data issue: false hasContentIssue false
  • English
  • Français

The crystal structure of stilpnomelane. Part III: Chemistry and physical properties

Published online by Cambridge University Press:  05 July 2018

R. A. Eggleton  and
B. W. Chappell
R. A. Eggleton
Affiliation:
Department of Geology, Australian National University, Canberra, A.C.T
B. W. Chappell
Affiliation:
Department of Geology, Australian National University, Canberra, A.C.T
Get access Rights & Permissions [Opens in a new window]

Summary

Full chemical analysis, cell dimensions, γ refractive index, density, and infra-red absorption spectrum have been determined for fourteen stilpnomelanes. Coupled with data from previously described material and electron probe analyses of three further samples, the new information shows that γ = 1·616+0·0047 Fe3+ −0·0037 Mg; substitution of Mn for Fe appears to have little effect on γ. For ferrostilpnomelane, D = 2·85−0·011 Mg, for ferristilpnomelane, D = 2·89−0·011 Mg. Cell dimensions clearly distinguish ferro-, ferri-, and man-ganstilpnomelanes; for ferri-stilpnomelane a = 22·03−0·00446 Mg−0·00786 Fe3+ (Å). A convenient approximation to the structural formula using a ⅛ subcell, is K0·6(Mg, Fe2+Fe3+)6Si8Al(O,OH)27 2–4 H2O.

Type
Research Article
Information
Mineralogical Magazine , Volume 42 , Issue 323 , September 1978 , pp. 361 - 368
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1978

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

Cremer, (M. C.) and Elsheimer, (H. N.), 1972. Anal. Chim. Acta, 60, 183.CrossRefGoogle Scholar
Deer, (W. A.), Howie, (R. A.), and Zussman, (J.), 1962. Rock Forming Minerals, 3, Wiley.Google Scholar
Eggleton, (R. A.), 1972. Mineral. Mag. 38, 693–711.CrossRefGoogle Scholar
Eggleton, (R. A.), 1975. Am. Mineral. 60, 1063-8.Google Scholar
Eggleton, (R. A.) and Bailey, (S. W.), 1965. Clay Miner. Proc. Nat. Conf. 13, 49.Google Scholar
Farmer, (V. C.), 1974. Mineral. Soc. Monogr. 4.Google Scholar
Graham, (C. M.), 1976. Mineral. Mag. 40, 467-72.CrossRefGoogle Scholar
Gruner, (J. W.), 1937. Am. Mineral. 22, 915-25.Google Scholar
Hutton, (C. O.), 1938. Mineral. Mag. 25, 172–206.Google Scholar
Klein, (C., Jr.), 1974. Can. Mineral. 12, 475-98.Google Scholar
Krautner, (H. G.) and Medesan, (A.), 1969. Tschermaks Mineral. Petrogr. Mitt. ser. 3, 13, 203.Google Scholar
Matkovsky, (O. I.), 1964. Mineral. sborn. Evov. geol. Obshch. 18, 59–66.Google Scholar
Nitsch, (K. H.), 1970. Fortschr. Mineral. 47, 48-9.Google Scholar
Norrish, (K.) and Hutton, (J. T.), 1969. Geochim. Cosmochim. Acta, 33, 431-53.CrossRefGoogle Scholar
Peck, (L. C.), 1964. Bull. U.S. Geol. Surv. 1170.Google Scholar
Rayner, (E. O.), 1961. Geol. Surv. New South Wales, unpublished report.Google Scholar
Read, (P.), 1973. Bull. Geol. Surv. Can. 193.Google Scholar
Riley, (J. P.), 1958. Analyst, 83, 42-9.CrossRefGoogle Scholar
Shirozu, (H.), 1964. Rept. Fac. Sci. Kyushu Univ., Geol. 5, vii, I.Google Scholar