Geology and. Mineralogy. 463 



Ta 2 5 , 4-90 Ti0 2 with 19-40 U0 2 , 8-60 Fe 2 3 and 4-00 (Y,Er) 2 3 ; 

 its relations are uncertain though the material was homogeneous. 

 — Ibid., xxxv, 194. 



Manandonite forms white lamella? or mammillary crusts on 

 quartz ; cleavage micaceous ; luster pearly. An analysis by 

 Pisani gave: Si0 2 25*20, A1 2 3 47-02, B 2 3 9*25, Li 2 3*97, K 2 

 0-20, Na 2 0-48, H 2 14-10 = 100'22. The formula calculated is 

 H 24 Li 4 Al 14 B 4 Si 6 6 53 . L.c, p. 223. The Madagascar localities have 

 also yielded many rare species including euxenite, monazite, 

 columbite, struverite, rhodizite, danburite, hambergite, bismuthi- 

 nite, lazulite and others. 



Plumboniobite is a niobate of uranium, yttrium, lead and 

 other bases described by Hauser and Finkh from the mica mines 

 of Morogoro, German East Africa. It occurs in massive form ; 

 color dark brown to black : hardness 5 — 5*5 ; specific gravity 4*81. 

 — Zs. anorg. Chem., lxiv, 2270, 1909, in Zs. Kryst., li, 385. 



Uhligite is described by O. Hauser as occurring in black octa- 

 hedrons in a nephelinite on the Magad lake in East Africa. It is 

 allied to keilhauite and zirkelite. — Zs. anorg. Chem., lxiii, 340, 

 1909, in Zs. Kryst., li, 320. 



Vbbaite is a new thallium mineral described by B. Jezek from 

 Allchar in Macedonia, and named after Prof. Vrba of Prague. 

 It occurs in small pyramidal orthorhombic crystals ; color 

 bluish gray-black; hardness 3-5 ; specific gravity 5*3. An analy- 

 sis by Krehlik yielded the formula TlAs 2 SbS 5 . Zs. Kryst., li, 363, 

 379, 1912. Associated with the above mineral are orthorhombic 

 crystals resembling stibnite in aspect which have been minutely 

 studied and shown to be distinct in form, although material for 

 analysis is not available. This has been provisionally named 

 Allcharite. — Ibid., li, 275. 



Preslite-Tsumebite. A new mineral from Tsumeb in Ger- 

 man Southwest Africa has been described about the same time as 

 preslite by V. Rosicky and tsumebite by K. Busz. It occurs in 

 small tabular crystals, often twins, referred by the first author to 

 the orthorhombic system, by the second to the monoclinic sys- 

 tem. Color green ; hardness 3*5 ; specific gravity 6*1. Analysis 

 showed it to be a complex basic phosphate of lead and copper. 

 — Zs. Kryst., li, 521, 526, 1912. 



Baeumlerite is described as a new potash mineral by O. Ren- 

 ner. It occurs associated with halite and tachhydrite at the 

 potash mine Desdemona in the Leinetal. The composition is 

 stated to be KCl.CaCl 2 .— Centralblatt Min., p. 106, 1912. Zam- 

 bonini later shows that it is identical with Scacchi's chlorocalcite. 

 —Ibid., p. 270, 1912, and Min. Vesuv., p. 50, 1910. 



Hatchite is a new mineral from the Binnenthal, Switzerland, 

 described by R. H. Solly and G. F. Herbert Smith. Known only 

 from a few small crystals of lead-gray color and distinctive tri- 

 clinic form; composition undetermined. — Min. Mag., xvi, 287, 

 1912. 



Chrom-brugnatellite is allied to brugnatellite but contains 

 chromium. It is described by Dr. Laura Hezner as occurring 



