pyrrhosiderite Min.
(-saɪˈdɪəraɪt, -ˈsɪdəraɪt)
Also (erron.) pyrosiderite.
[ad. Ger. pyrrhosiderit (Ullmann a 1813), f. Gr. πυρρός reddish + σίδηρος iron + -ite1.]
A synonym of goethite.
| 1830 J. H. Brooke in Encycl. Metrop. (1845) VI. 495/1 Goethite; Pyrosiderite; Iron Froth. 1836 T. Thomson Min., Geol. etc. I. 439 Pyrosiderite. 1854 Dana Syst. Min. (ed. 4) II. 129 Pyrrhosiderite. 1868 Ibid. (ed. 5) 170 In thin scale-like or tabular crystals, usually attached by one edge. Such is the original Göthite (Pyrrhosiderite) of Siegen. |