Abstract
The mineral carminite was first described by F. von Sandberger in 1850 in a paper which appeared in Poggendorff's Annalen, entitled ‘Carminspath, ein neues Mineral aus der Ordnung der Arseniate’. It occurred near Horhausen, Rhenish Prussia, forming clusters of fine needles of a carmine- to tile-red colour, implanted on quartz, limonite, and beudantite, and accompanied by pyrolusite, clear crystals of mimetite, and an undetermined yellow, earthy mineral. In a subsequent paper in 1858, ‘Ueber den Carminspath,’ he gave the precise locality as the Luise mine, Horhausen, Rhenish Prussia ; and a quantitative analysis, on 0.068 gram by R. Müller, showed the mineral to be an anhydrous arsenate of iron and lead : As2O5, 49.11 ; Fe2O5, 30.29 ; PbO, 24.55 = 108.95. A trace of phosphoric acid was also present.
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