An Elementary Introduction to Mineralogy
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1837 edition. Excerpt: ...with a little lime, the oxides of manganese and iron, and fluoric acid. Phosphoric acid 33-40 34-72 Alumina 35-35 36-56 Water 26-80 28-00 Lime 0-50 0-00 Oxide of iron and mangan. 1'25 0-00 Fluoric acid 2-06 Berzelius. 0-00, Fuchs. Sp. Gr. 2-337. H. = 3-5--4-0. Primary a right rhombic prism of 122 15' and 57 45'. It occurs in minute crystals, which usually adhere together and radiate, forming hemispherical or globular concretions from a very small size to that of an inch in diameter. The general form of the crystals is that of a rhombic prism with diedral terminations, but the lateral edges of the prism are sometimes replaced; and they are rarely sufficiently distinct to admit of measurement. It cleaves parallel to M and h, with brilliant surfaces; commonly translucent, sometimes opake, and possessing a silky or vitreous lustre; colour yellowish-white, yellow, greyish, green, or bluish; occasionally of a dingy brown, owing to the progress of decomposition; brittle. It is infusible, but under the blowpipe becomes white, opake, and loses its crystalline form, giving a slight greenish tinge to the flame. It is soluble in heated acid, without effervescence, emitting a vapour which slightly corrodes the glass. Wavellite, in honour of Dr Wavel, its discoverer. It was first discovered by Dr Wavel in small veins and cavities in argillaceous schiste, near Barnstaple, in Devonshire; it has been since found at Stenna Gwyn, near St Austle in Cornwall, on a decomposing granite; in very highly coloured pistachiogreen masses at Clonmell, and near Cork; in white stellated groups on red sandstone at Zbirow, in Bohemia; on brown iron ore at Amberg, in Bavaria (a variety named by Fuchs Lasionite); in the Shaint Isles of Scotland; and near Villa Ricca in Brazil. The...
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