Geology and Mineralogy. 517 



green. Soluble in acids. Found at the Higgins Mine, Bisbee, 

 Arizona, associated with manganese oxides. 



Hydroclinohumite. Titanhydroclinohumite. F. Zambonini, 

 Bull. Soc. Min., 42, 250, 1919. The material previously called 

 iiianolivine from the Ala valle^^. Piedmont, Italy, is shown to be 

 a titaniferous variety of clinohumite in which the fluorine is 

 almost entirely replaced by hydroxyl. 1.3 per cent of beryllium 

 oxide is also present in the mineral. 



Kreuzbergite. H. Laubmann and H. Steinmetz. Zs. Kr., 

 55, 441, 1920. Orthorhombic. a :l : c = 0.3938 : 1 : 0.5621. 

 Pyramidal. Color white to yellow. Basal cleavage. G. =i 2.13*9. 

 ^1 = 1.62. Ax. pi. II c(OOl). 2y = 90° approx. Optically—. 

 Comp. — An aluminium phosphate with Fe, Mn, H2O. Found in 

 pegmatite associated with other phosphates at the Kreuzberg, 

 Pleystein, Bavaria. 



Meta-torbernite I. A. F. Allimond, Min. Mag., 19, 43, 1920. 

 The first dehydration product, known as meta-torbernite I, is 

 shown to exist in the natural material called torbernite from Gun- 

 nislake in Cornwall. G. = 3.68. 0^ = 1.623. e = 1.625. Comp.— 

 CuCUOJ.CPOJs-SH^O. 



Phosphoferrite. H. Laubmann and H. Steinmetz. Zs. Kr., 

 55, 569, 1920. Crystalline masses. Poor cleavage. Splintery 

 to conchoidal fracture. Greasy luster. Color white with pale 

 3^ellow or green tints. H. = 3-4. G. = 3.165. Biaxial, -f-. 

 Comp. — Ferrous phosphate Avith small amounts of MnO, CaO, 

 MgO, HoO. In pegmatite at Habendorf, Bavaria. 



Phosphophyllite. H. Laubmann and H. Steinmetz. Zs. 

 Kr., 55, 565, 1920. Monoclinic. a -.l : c = 1.0381 : 1 : 1.7437. 

 /? = 89° 22'. Tabular parallel to a(lOO) or prismatic. Twin- 

 ning on base common. Colorless to pale bluish green. Trans- 

 parent. Vitreous. Perfect cleavage || c(OOl), good || a (100) 

 and Z>(010). H. = 3-4. G. =: 3.081. ^z = 1.65. Ax. pi. || 

 &(010). Optically—. 2E = 75°. Comp.— 3R3P,08.2Al(OH)SO,. 

 9H2O ; R = Fe, Ca,' Ba, Mg, K„Mn. Associated with triplite 

 in pegmatite at Habendorf, Bavaria. 



Plazolite. W. F. Foshag. Amer. Min., 5, 183, 1920. Iso- 

 metric. In minute dodecahedrons. H. = 6.5. G. = 3.13. Col- 

 orless to light yellow. Vitreous to almost adamantine luster. 

 n = 1.71. Comp.— 3CaO.AL03.2 (SiO„CO_o) .2H2O. Found in 

 an altered pegmatite in the limestone quarrv at Crestmore, Cal. 



Trigonite. G. Flink. Geol. For. Forh., 42, 436, 1920. Mono- 

 clinic-clinohedral. a -.h : c = 1.03395 : 1 : 1.65897. ^ = 91° 31'. 

 In small wedge-shaped crystals. H. = 2-3. Cleavage || (010) 

 perfect; less perfect || (101). Color sulphur-yellow to 

 brownish. Subtransparent. Luster vitreous to adamantine, 

 a = 2.08. 7 = 2.16. Ax. pi. || (010). Comp.— PbgMnH 

 (As03)3. Found at Langban, Sweden, implated on dolomite. 

 Names from rpt/xojvo? triangle, in allusion to its crystal shape. 



Ultrabasite. V. Rosicky and J. Sterba. Zs. Kr., 55, 430-439, 



Am. Joub. Sci.— Fifth Series, Vol. I. No. 6.— June, 1921. 

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