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New Mineral Names NEW MINERAL NAMES "Mellahitett Erqxrco Nrccolr: Gi.orm.Chim. und Applicata, S, 309-313, (1926). A nameapplied to the mixed saltsobtained from the Mellaha salinesby evapora' tion: MgSOr3l-33Vo,MeClz24, NaCI 18-20,KCI 19-21.Not a mineral. W.F.F Potarit6 L. J. SreNcnn:Mineral. Mag.,2l,No. 117,p.235(1927). The palladiumamal- gam from the Potara River (Am. Mineral.,10, 33, 1925)has been distributed by Sir J.[8. Harrison under the name potarite. Spencermentions this name in his bio- graphical notice of Sir J. B. Harrison. W. F. F. , Muntenite L. J. Senxcnn:Ibdd.p.247. Spencernotes the name muntenite, in honor of GeorgeMurgoci (GeorgeMun- teanu), given to a variety of Roumanianamber, but no descriptionof this seemsto belavailable. W.F.F Unnamed Mineral H. R. Aneu: A note on a new Palladium Mineral from the Potgietersrust Platinum Fields. f our. Chem.Met. Min. Soc.South Africa,27' 249-250 (1927). Csrutcar- Pnoprnrms: An antimonide of palladium, PdaSb. Analysis: Pd 70.4, Sb 26.0,Insol. 1.4, Fe2O30.9. Unattacked by nitric and sulphuric acids but easily soluble in acqua regia. Platinum is absent or present only in very small amounts. PEysrcALPnopnnrrns: Color silvery white to darker steel gray' Sp. Gr. 9.5. Occunnolrce: Found at the farm Tweefonteinof the PotgietersrustPlatinum Company,associated with sperrylite. The sperryliteoccurs in sheerzones traversing the banded iron stone of the Pretoria Series. Included in thesezones are eyesof pegmatite. The new mineral was found as smali crystals closely associatedwittr the pegmatite. w. F. F. Collinsite Eucnxr PorttvrN: A new Canadian occurrenceof phosphorite from near FrangoisLake, British Columbia. ConadoDept. Mines, BuII. 46,5-9 (1927). N.rue: fn honor of W. E. CoUi.ns,Director of the GeologicalSurvey, Canada. Csnutcer. Pnoponnes: A hydrated phosphate of lime, magnesia and iron oxide. Formula: 2CaO(Mg, Fe)O'PzOt.ZrhHzO, Analysis(by E. A. Thompson) CaO.32.18,FeO 6.86,MgO 6.34,MnO tr., FesOa0.80, MnzOs 0.36, AI2OB 0.39, PrOr39.83, F O'27,COz 0.23, HzO- 0.15,HrO+ 12.28,C 0.18,SiO, 0'10' Sum (-0:F, 0.11)99.86. Easily solublein acids. Fusibleaf 3 to brownishslag. Cnvsre.r,r-ocr.lBnrcPnopnnrrss: Triclinic with four cleavageswith the fol- lowing angles C,ACr:88'40', CrACr:108'00', Cz[Cs:111'00', CtACt: 131000'. Pnvsrcll ,tuo Opnce,r Pnoprnrrus: Color light brown. Luster silky. Optically positive.2V :80' . a:I.fi2, A:1.642,t:1.657. Birefringence0.025. gACr: 150"' FACz:66', 0ACt:M". Sp.Gr. 2.95. Hd.:3-3.5. THE AMERICAN MI NERALOGIST Occunnpnce: Found in abundance on the north side of Frangois Lake, British Columbia, as nodules together with quercyite in a small irregular vein 4-12 inches wide associated with asphalt and brecciated andesite. Drscusston: Collinsite is a member of the roselite group and is the magnesia analogue of messelite. w. F. F. ADDITIONAL DATA Tinzenite J. Jaxon: Die Tinzen-varietiiten aus dem Val d'Err. (Graubiinden). (The Tinzenite varietiesof Val d'Err, Graubiinden)Schwei.z. Min. Petr. Mitt;6,200-202 (re26). The color varies from lemon yellow to orange red. Two new analyses are given: Orange yellow Orange red SiOc 4t.22 41.08 TiOr 0.11 tr. Al2o3 r7.4t 16.55 FezOg t.69 2.32 MnzOs 22.18 22.50 Mso 0.69 0.66 CaO t4.t9 15.01 NarO 0.48 0.t2 KzO 0.42 0.66 HrO+ | 33 1.07 HrO- 0.08 0.06 99.80 100.03 Mn"' gives minerals of light tones-yellows. Mn" gives red browns to copper red. In the yellow tinzenites Mnt" is present alone. fn the orange ones a small amount of Mn" is present. W. F. F. Truscottite J. A. Gnurrnnrwr: Truscottiet. Verh. Geol. Mijn. Genoot. Netlerland,. Geol,., Ser. 8, pp. 197-200 (1925). Onrcrxar- Dnscnptrou: P. Hd,vig: Jaarb. Mijn. Neileiland,4l, (1912). Cmltrcar- Pnoprnrros: A hydrous silicate of lime and magnesia. 2(Ca, Mg)O. 3SiOr. 1.3 HrO (if "essential" wateris considered) or2(Ca, MS)O.3 SiOr.3 HrO (if all the water is included). Analysis (on material of demonstrated purity; average of two): SiOr 57.83, CaO 26.43, MgO 5.33, FeO 0.08, MnO 0.25, AI:Oa 0.95, KrO 0.73, NazO 0.78,HrO (+) 4.10,HrO (-) 3.41; Sum 99.89. Pnvsrcet .lNo Oprrcer- PnomnrrBs: Color white, luster pearly on cleavage. Birefringence weak. Extinction parallel. Elongation negative. n:1.560. Occunmrcn: From the Lelong Donok gold mine, Benkoelen, Sumatra, as white spheroidal aggregates. Drscussrox: Related to gyrolite but the name truscottite provisionally re- tained since it shows some minor physical difierences from gyrolite w. F. F..
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