X-ray Studies of Natural Fabrics. I. Growth-Fabrics in Hematite Kidney Ore and in Fibrous Calcite

R. Bradshaw and F. C. Phillips
Department of Geology, University of Bristol

Summary: Fibres of hematite in kidney ore are elongated at right angles to the c-axis. The fibre axis, which may be normal to a face of either of the hexagonal prisms {101¯0} or {112¯0}, may show an abrupt change of orientation along the length of a fibre. There is little preferred orientation around the length of the fibres.

It is confirmed that in some calcite satin spar the fibres are elongated parallel to an edge of the cleavage rhombohedron; in other fibrous growths the elongation is either parallel to or Perpendicular to c.

Mineralogical Magazine; March 1967 v. 36; no. 277; p. 70-77; DOI: 10.1180/minmag.1967.036.277.10
© 1967, The Mineralogical Society
Mineralogical Society (www.minersoc.org)