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234 OXIDES, EABTHS, AMD ACIDS. Analyses of pyrolusite (i from TJndenaes by Arfvedson, b from Eglersburg, c from an unknown locality, botb by Turner, d from Ilmenau by Scheffler:— abed Bed oxide of manganese iinMa 83’56 84'os 85’62 87'0 Oxygen 1178 11'60 11‘0 Barytes — 0-53 0-07 1-2 Lime 0 . 3 Alumina 0 . g Eed oxide of iron .... 1>3 — o-6l 0'65 0-8 Water 1-80 1-12 1-67 5'8 In attached crystals, reniform and botryoidal masses, com pact, earthy, pseudomorphous after calcite, manganite and poliamte m veins in porphyry, gneiss and other rocks, in beds with psuomelane, hematite, gothite, baryte, chalybite, calcite, aragonite. Is found at Ilmenau, Fricdrichsrode, Eglersburg, Eeinweg in Thuringia, Yorderehrensdorf near Mahrish-Triibau in Moravia, Si Harz, near Zellerfeld and Goslar, and occasionally at Ihlefeld, pseudomorphous after manganite and calcite; at Jo- hann-Georgenstadt in Saxony, Hirschberg in Westphalia, the Sudelzeche near Platten, and many veins of iron ore in the mining districts of Bohemia; in beds of chalybite, especially when decomposed, in Stiria, Carinthia and Ilessia j in veins of chalybite and hydrous iron-oxido in Sayn, Streitberg, liorhausen and Herdorf near Siegen, and near Friedewald, Knorrenberg, Hamm in Westphalia, Schnarchenreuth and Hirscliberg near Arzberg in Baireuth, Schwarzenthal in the Eiesengebirgo, Waidhofen on the Thaia in Austria, Konradswaldau and Eemerz in Silesia, Maczkamezo in Transylvania, Villa Eicca in the Brazils. Varvieite which, according to the analysis of Phillips, consists of manganese 03-3, oxygen 317, water 6, is supposed to be a mechanical mixture of pyrolusite and manganite. 121. POLIANTTE.—Polianit; Breithaupt, Haidinger. Prismatic. 011,010 = 57°43'; 101,001 =31°o'; 110,100 =40°20'. be 00° 0'
