Hostname: page-component-78c5997874-fbnjt Total loading time: 0 Render date: 2024-11-15T05:19:57.167Z Has data issue: false hasContentIssue false
  • English
  • Français

Carlosturanite (not ‘picrolite’) from Taberg, Sweden

Published online by Cambridge University Press:  05 July 2018

Marcello Mellini  and
Jack Zussman
Marcello Mellini
Affiliation:
C.N.R., C.S. Geologia Strutturale Dinamica dell'Appennino, via S. Maria 53, 56100 Pisa, Italy
Jack Zussman
Affiliation:
Department of Geology, University of Manchester, Oxford Road, Manchester M13 9PL, UK
Get access Rights & Permissions [Opens in a new window]

Abstract

The second occurrence of the asbestiform silicate carlosturanite is reported. The mineral occurs in Taberg, Sweden, and it was previously reported as ‘picrolite’, that is fibrous antigorite. Carlosturanite from Taberg is non-pleochroic, green in colour and has positive optical elongation. The unit cell parameters are a = 36.55, b = 9.31, c = 7.27Å, β = 101.05°. Based on the determined formula, (Mg20.47Fe0.59Mn0.06Cr0.01Ti0.01) (Si11.68Al0.28)O27.81(OH)34.19H2O carlosturanite can be expected to crystallize within the pure MgO-SiO2-H2O system as a low-grade metamorphic mineral.

Because there are close similarities in structure and properties of carlosturanite and the picrolite variety of antigorite, their distinction requires careful attention to X-ray and electron diffraction patterns and chemical compositions. The present identification of the Taberg specimen as carlosturanite puts a lower limit of 33.7 Å to the known range of a parameters of antigorite.

Keywords

carlosturanitepicroliteantigoriteasbestiform mineralsTabergSweden
Type
Silicate mineralogy
Information
Mineralogical Magazine , Volume 50 , Issue 358 , December 1986 , pp. 675 - 679
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1986

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

Brindley, G.W., Comer, J.J., Uyeda, R., and Zussman, J. (1958) Ada Crystallogr, 11, 99-102.CrossRefGoogle Scholar
Chapman, J.A., and Zussman, J. (1959. Ibid. 12, 550-2.CrossRefGoogle Scholar
Compagnoni, R., Ferraris, G., and Mellini, M. (1985) Am. Mineral, 70, 767-72.Google Scholar
Cressey, B.A. (1979) Can. Mineral, 17, 741-56.Google Scholar
Cressey, B.A. and Zussman, J. (1976. Ibid. 14, 307-13.Google Scholar
Jiang, S., and Liu, W. (1984) Ada Geol. Sinica, 58, 136-42.(Chinese with English abstract) MA 85M/0747.Google Scholar
Kunze, G. (1961) Fortsch. Minera, 39, 206-324.Google Scholar
Mellini, M. (1982) Am. Mineral, 67, 587-98.Google Scholar
Mellini, M. (1986) Mineral. Mag, 50, 301-5.CrossRefGoogle Scholar
Ferraris, G., and Compagnoni, R. (1985) Am. Mineral, 70, 773-81.Google Scholar
Page, N.J. (1968. Ibid. 53, 201-15.CrossRefGoogle Scholar
Thomas, J.M., Jefferson, D.A., Mallinson, L.G., Smith, D.J., and Sian Crawford, E. (1979) Chemica Scripta, 14, 167-79.Google Scholar
Trommsdorff, V. (1982) Rend. Soc. Ital. Mineral. Petrol, 38, 549-59.Google Scholar
Veblen, D.R., and Buseck, P.R. (1979) Science, 206, 1398-1400.CrossRefGoogle Scholar
Whittaker, E.J.W. (1957) Ada Crystallogr, 10, 149-56.CrossRefGoogle Scholar
Whittaker, E.J.W. and Wicks, F.J. (1970) Am. Mineral, 55, 1025-47.Google Scholar
Whittaker, E.J.W. and Zussman, J. (1956) Mineral. Mag, 31, 107-26.Google Scholar
Wicks, F.J., and Whittaker, E.J.W. (1975) Can. Mineral, 13, 227-43.Google Scholar
Wicks, F.J., and Whittaker, E.J.W. and Zussman, J. (1975. Ibid. 13, 244-58.Google Scholar
Yada, K. (1967) Acta Crystallogr, 23, 704-7.CrossRefGoogle Scholar
Yada, K. (1971. Ibid. A27, 659-64.CrossRefGoogle Scholar
Yada, K. (1979) Can. Mineral, 17, 679-91.Google Scholar
Zussman, J. (1954) Mineral. Mag, 30, 498-512.Google Scholar
Brindley, G.W., and Comer, J.J. (1957) Am. Mineral, 42, 133-53.Google Scholar