A Handbook to a Span Classsearchtermspan Classsearchtermcollectionsp
A Handbook to a Span Classsearchtermspan Classsearchtermcollectionsp
F W Frederick William Rudler
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Gonnard to explain the origin of the pyromorphite of Pontgibaud. F Associated with the pyromorphite of Roughten Gill, there occa- sionally occurs a smalt-blue or lavender-coloured mineral, formerly * " Ueber die Zusammensetzung einiger Tellurmineralien. " Zeit-s. Kryst. U. Min. , vol. Xxix. (1898), p. 140 : " Grtinlingit, ein neues Mineral, " p. 144. t " De la genese des phosphates et arseniophosphates plombiferes de Roure et de Hosiers (Pontgibaud). " Butt. Soc. Min. Fr. T vol. Vi. (1888), p. ...35. 7882. M 2 156 MINERALS OF CUMBERLAND. regarded as a kind of calamine, but shown by Professor Miers, from examination by Mr. G. T. Prior, to be a phosphate of lead and aluminium. * Specimens are seen in Nos. 1132 to 1134. Ana- lyses by Mr. E. G. J. Hartley, in the mineralogical laboratory at Oxford, f have proved it to be identical with a mineral from Georgia, described many years ago by Professor Shepherd under the name of Hitchcockite. The blue colour is probably due to the presence of a small proportion of copper.
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