Holtite: a new mineral allied to dumortierite

1971 ◽  
Vol 38 (293) ◽  
pp. 21-25 ◽  
Author(s):  
M. W. Pryce
Keyword(s):  
Optical Properties ◽  
Chemical Analysis ◽  
Western Australia ◽  
Prime Minister ◽  
Unit Cell ◽  
New Mineral ◽  
Space Group ◽  
Free Basis ◽  
X Ray ◽  
The Government

SummaryHoltite, a new mineral allied to dumortierite, occurred as pebbles with stibiotantalite and tantalite on an alluvial tin lease near Greenbushes, Western Australia, and is named after the late H. E. Holt, Prime Minister of Australia.The mineral is orthorhombic with a 11·905 Å, b 20·355 Å, c 4·690 Å, space group Pmcn, weak supercell 2a, 2b, c developed. Crystals are elongated along c, D 3·90 ± 0·02, hardness 8½, fluorescent. Optical properties α 1·743−1·746, mainly yellow, ‖ [001], β 1·756−1·759, colourless, γ 1·758−1·761, colourless, 2Vα 49−55°, r < v. X-ray powder data are given.Chemical analysis gave SiO2 20·30, Sb2O5 4·61, Al2O3 46·43, Ta2O5 11·24, Nb2O5 0·76, Fe2O3 0·27, MnO 0·05, TiO2 0·09, BeO 0·05, B2O3 1·82, Sb2O3 13·89, H2O+ 0·38, H2O− 0·08, sum 99·97%. On a water-free basis the unit cell contains Al24·5Sb2·56‴Ta1·36Sb0·76vNb0·16Fe0·10‴Be0·05Ti0·03Mn0·02B1·40‴Si9·09O66·85. Compared with dumortierite, 4[(A1,Fe)7BSi3O18] or 4 (X11O18), the holtite unit cell contains approximately 4(X10O17).Type material is preserved at the Government Chemical Laboratories, Perth, Western Australia.

Urea, a new mineral, and neotype phosphammite from Western Australia

1973 ◽  
Vol 39 (303) ◽  
pp. 346-348 ◽  
Author(s):  
P. J. Bridge
Keyword(s):  
Optical Properties ◽  
Chemical Analysis ◽  
Western Australia ◽  
Type Material ◽  
New Mineral ◽  
Space Group ◽  
X Ray ◽  
Group A ◽  
The Government

SummaryUrea, a new mineral identical with the artificial compound, occurs as crystals associated with phosphammite, ammonian aphthitalite, and weddellite in guano from Toppin Hill, 123° 56′ E., 28° 42′ S., Western Australia. The urea occurs as elongated tetragonal pyramids, space group , a 5·646, c 4·701 Å, X-ray powder data are given. Optical properties: ω 1·484, ε 1·603. Chemical analysis gave urea, CO(NH2)2 96·0, H2O− 0·46, Na 0.13, K 0·35, Ca 0·07, Mg 0·03, S 0·11, P 0·24, NH3 < 1·0 %, remainder probably mainly H2O+; urea 96 %, impurities 4 %. Type material is preserved in the collection of the Government Chemical Laboratories, Perth, Western Australia.

Calcium sulphosilicate in lime-kiln wall coating

1972 ◽  
Vol 38 (300) ◽  
pp. 968-971 ◽  
Author(s):  
M. W. Pryce
Keyword(s):  
Optical Properties ◽  
Chemical Analysis ◽  
Organic Acids ◽  
Western Australia ◽  
X Ray ◽  
Lime Kiln ◽  
Sulphur Trioxide ◽  
The Government ◽  
Oil Fuel ◽  
Pale Green

SummaryGreen calcium sulphosilicate layers were formed in lime-larnite-calcite wall coating in a lime kiln at Rivervale, Western Australia. The compound formed in the kiln flame area by the combination of siliceous lime sand feed with sulphur trioxide from the sulphurous oil fuel.The calcium sulphosilicate is orthorhombic with a 10·183, b 15·408, c 6·825 Å, space group Pcmn. Crystals are [100] tablets or prisms elongated along c, D 2·95, hardness 5, streak pale green, decomposed by organic acids. Optical properties α 1·632 = [001] blue, β 1·638 = [100] yellow-green γ 1·640 yellow-green, 2Vα = 60°, dispersion r > v, X-ray powder lines: 2·855 (10) 032,202; 2·838 (7) 330,321; 3·35 (6) 012; 2·622 (6) 331; 2·571 (6) 060; 3·20 (5) 231; 1·962 (5); 1·899 (5); 1·896 (5); 1·372 (5).Chemical analysis by P. Hewson gave: SiO2 21·50, Al2O3 1·83, Fe2O2 0·50, CO2 0·49, P2O5 0·23, CaO 57·19, MgO 0·35, Na2O 0·22, K2O 0·22, SrO 0·15, Li2O 0·06, SO3 16·71, H2O+ 0·28, H2O− 0·10, others 0·04, total 99·87. On a water-free basis the unit cell contains Ca19.66 Mg0.17 Na0.14 K0.08 Sr0.03 Li0.08 approximately 4[Ca5(SiO4)2SO4] and isostructural with silicocarnotite, 4[Ca5(PO4)2SiO4]. Type material is preserved at the Government Chemical Laboratories, Perth, Western Australia.

Magnesian collinsite from Milgun Station, Western Australia

1974 ◽  
Vol 39 (305) ◽  
pp. 577-579 ◽  
Author(s):  
P. J. Bridge ◽  
M. W. Pryce
Keyword(s):  
Optical Properties ◽  
Chemical Analysis ◽  
Western Australia ◽  
X Ray ◽  
The Government ◽  
White Streak

SummaryAn occurrence of magnesian collinsite has been found with other rare phosphates in a variscite deposit in semi-desert 15 km NW. of Milgun Station homestead (25° 6′ S., 118° 18′ E.), Western Australia. The collinsite occurs as tapering white 3-mm prisms, mammillated aggregates, and thin veinlets in cavities in mudstone. The crystals have two good cleavages, D2.93, subvitreous lustre, H4–5, white streak and are brittle. Optical properties α 1·632, β 1·642, γ 1·657, 2Vγ , ≈ 80°. The mineral is triclinic with a 5·734, b 6·780, c 5·441 Å, α97·29° β 108·56°, γ 107·28°. X-ray powder data given, the lines are similar to P.D.F. card 14–314 but new cell gives better indexing. Chemical analysis by F. R. W. Lindsey gave FeO 0·07, MgO 11·3, CaO 35·2, Na2O 0·01, K2O 0·02, P2O5 41·2, H2O+10·7, H2O− 0·15, F0·02, SiO2 (quartz impurity) 1·31, Al, Mn, Zn, SO3 not detected, net sum 99·97, close to Ca2Mg(PO4)2.2H2O, after deduction of moisture and quartz impurity. Typical specimens are preserved at the Government Chemical Laboratories, Perth, Western Australia.

The related layered minerals ganophyllite, bannisterite, and stilpnomelane

1968 ◽  
Vol 36 (283) ◽  
pp. 893-913 ◽  
Author(s):  
Marie Lindberg Smith ◽  
Clifford Frondel
Keyword(s):  
New Jersey ◽  
Chemical Analysis ◽  
Single Crystal ◽  
New Mineral ◽  
Aroostook County ◽  
Space Group ◽  
X Ray ◽  
Structural Resemblance

SummaryTwo monoclinic minerals formerly classified as ganophyllite have been differentiated on the basis of single-crystal X-ray data. True ganophyllite occurs at the Harstig mine, Pajsberg, Sweden (a, 16·60 ± 0·05 Å; b, 27·04 ± 0·08 Å; c, 50·34 ± 0·15 Å; β, 94° 10′ ± 10′; space group A 2/a), at the Benallt mine, Caernarvonshire, Wales, and in Aroostook County, Maine. Bannisterite, a new mineral, occurs at Franklin, New Jersey (a, 22·20 ± 0·07 Å; b, 16·32 ± 0·05 Å; c, 24·70 ± 0·08 Å; β, 94° 20′ ± 10′; space group A2/a) and at the Benallt mine, Wales. Both minerals have similar pseudocells: a, 5·53 Å; b, 3·3 Å; c, 25 Å; β, 94° The chemical analysis of ganophyllite from the Harstig mine, Sweden, is: SiO2, 39·67 %; Al2O3, 7·95; Fe2O3, 0·90; MnO, 35·15; CaO, 1·11; MgO, 0·20; PbO, 0·20; K2O, 2·70; Na2O, 2·18; Li2O, trace; H2O, 9·79; total, 99·85. The chemical analysis of bannisterite from Franklin Furnace, New Jersey, is: SiO2 46·20 %; Al2O3, 4·74; MnO, 23·02; FeO, 6·40; ZnO, 4·67; CaO, 1·52; MgO, 1·99; Na2O, 0·29; K2O, 1·21; H2O, 9·74; total, 99·78.Both ganophyllite and bannisterite show a structural resemblance to stilpnome-lane from Deer Isle, Maine, in projection on selected zones. All three have a micaceous cleavage parallel to {001} in the orientations here taken. Stilpnomelane is triclinic, pseudotrigonal, and pseudomonoclinic. In the triclinic cell, a = b, 22·05 Å ± 0·06 Å; c, 17·70 ±0·06; α, 124° 49′; β, 95° 58′; γ, 120° 00′ (angles ± 5′). In the trigonal subcell, a′, 3·2 Å; c′, 36·4. Small distorted trigonal subcells for ganophyllite have a′, 3·38 Å; c′ 37·7, and for bannisterite have a′, 3·264 and c′, 37 Å.

Clinobisvanite, monoclinic BiVO4, a new mineral from Yinnietharra, Western Australia

1974 ◽  
Vol 39 (308) ◽  
pp. 847-849 ◽  
Author(s):  
P. J. Bridge ◽  
M. W. Pryce
Keyword(s):  
High Temperature ◽  
Western Australia ◽  
Yellow Powder ◽  
Type Locality ◽  
New Mineral ◽  
Cell Content ◽  
Space Group ◽  
The Government ◽  
Multiple Twinning ◽  
Monoclinic Bivo4

SummaryMonoclinic BiVO4, well known as a high-temperature compound, has been found as a mineral at Yinnietharra and subsequently in specimens from five further W.A. localities, Londonderry, Wodgina, Menzies, Westonia, and Corinthia. At the type locality, the mineral occurs on garnet in a beryl-bearing spessartine pegmatite associated with bismutite, bismutoferrite, and other pegmatite minerals.Clinobisvanite occurs as yellow powder and orange aggregates and plates to 0·1 mm, is commonly intergrown with bismutite, and frequently associated with its polymorph pucherite. It has a yellow streak, earthy to subvitreous lustre, is very soft with perfect {010} cleavage, D calc. 6·95, transparent in very thin cleavage flakes, and shows multiple twinning with cross hatching, strong dispersion and n calc. 2·63.Space group I 2/a, a, 5·186, b 11·708, c 5·100 Å, β 90° 26′ refined from powder data. An electronprobe analysis gave Bi2O3 69·88, V2O5 27·63, PbO 1·34 sum 98·85. Cell content 4[BiVO4] with minor substitution of Pb for Bi. All measurable data agree with earlier work including a prior description of the mineral from Mozambique.Type material is preserved in the government collections at the Government Chemical Laboratories, W.A.

Biphosphammite: a second occurrence

1972 ◽  
Vol 38 (300) ◽  
pp. 965-967 ◽  
Author(s):  
M. W. Pryce
Keyword(s):  
Western Australia ◽  
Mineral Content ◽  
Soft Water ◽  
Water Soluble ◽  
Space Group ◽  
X Ray ◽  
Partial Analysis ◽  
The Government ◽  
Bat Guano

SummaryBiphosphammite, NH4H2PO4, recorded once as secondary powder in 1870, occurs with bat guano in Murra-el-elevyn cave, 31° 20′ S., 126° 0′ E., Western Australia.The mineral occurs as tapering tetragonal prisms with pyramidal terminations, which are colourless to light buff, very soft, water soluble, contain fine syngenite inclusions, and have D 2·04, ω 1·525, ε 1·480 Space group. , a 7·4935 Å, c 7·340 Å, six strongest powder X-ray lines 3·75 Å (10) 200; 5·24 Å (9) 101; 3·02 Å (9) 112; 1·993 Å (8) 312,213; 2·65 Å (7) 220; 2·368 Å (7) 310,301. Partial analysis of purest available material gave: P2O5 51·1, K2O 14·2, (NH4)2O 12·3, SO2 5·59, Na2O 0·16, water-insolubles 0·81 per cent, remainder mainly CaO and H2O. Calculated mineral content is 88 % biphosphammite (62 % NH4H2PO4, 38% isomorphous KH2PO4), 11·5% syngenite, insolubles 0·81 % calc. total 100·3 per cent.Material proposed to be neotype is preserved at the Government Chemical Laboratories, Perth, Western Australia.

Glaukosphaerite: A new nickel analogue of rosasite

1974 ◽  
Vol 39 (307) ◽  
pp. 737-743 ◽  
Author(s):  
M. W. Pryce ◽  
J. Just
Keyword(s):  
Western Australia ◽  
Unit Cell ◽  
Type Material ◽  
Nickel Sulphide ◽  
Cell Content ◽  
Sulphide Mineralization ◽  
X Ray ◽  
Copper Nickel ◽  
The Government ◽  
Basic Rocks

SummaryGlaukosphaerite, a new secondary basic copper-nickel carbonate was first determined and described from Widgiemooltha (31° 30′ S., 121° 34′ E.), Western Australia, by R. C. Morris at the W.A. Government Chemical Laboratories in 1967. The mineral has since been found at the nickel mines at Kambalda, Windarra, Scotia, Carr Boyd Rocks, and St. Ives, Western Australia, and is apparently an indicator of copper-nickel sulphide mineralization. The name is derived from the colour and spherulitic formation. Associated minerals are goethite, secondary quartz, paratacamite, gypsum, nickeloan varieties of magnesite and malachite, and clays. Glaukosphaerite also fills joints in fresh basic rocks.The type material is from Hampton East Location 48, 3 km N. of the Durkin Shaft, Kambalda. Glaukosphaerite is monoclinic, a 9·34 Å, b 11·93 Å, c 3·07 Å, β 90–1°, space group indeterminate, c axis disordered, six strongest X-ray powder lines are 2·587 (10b) 201, 3·68(7b) 220, 2·516(4) 240, 211, 5·04(3) 120, 2·124(3b), 1·473(3). The mineral occurs in green spherules of fibres cleaved and elongated along c, D = 3·78 to 3·96 increasing with Cu, is brittle, H. 3 to 4, and has dull to subvitreous to silky lustre.α 1·69–1·71 green, β ≈ γ 1·83–1·85 yellow-green, α:[001] 7°.Chemical analysis on the type material, D 3·78, containing 0·5 % goethite impurity and minimal inseparable malachite, gave CuO 41·57, NiO 25·22, CoO 0·07, ZnO 0·02, Fe2O3 0·47, MgO 1·23, SiO2 < 0·01, CO2 21·70, H2O+ 9·85, H2O− < 0·01, sum 100·13%. After deduction of goethite the unit cell contains 4[(Cu,Ni,Mg,Co)1.74C0·96H2·12O4·73]. This unit-cell content is deficient in metal ions and oxygen and contains excess H, when compared to 4[(Cu,Ni)2(OH)2CO3]. Two analyses of malachite-bearing glaukosphaerite from Widgiemooltha and Carr Boyd Rocks show the same deficiencies and excess not previously recorded in malachite, rosasite, or aurichalcite analyses. Glaukosphaerite, 4[(Cu,Ni)2(OH)2CO3] is the nickel analogue of rosasite 4[(Cu,Zn)2(OH)2CO3].From results based on X-ray rotation patterns of oriented rosasite fibres from Sardinia and Durango with supplementary electron-microprobe studies and Guinier powder-film data, the authors consider glaukosphaerite and rosasite to be separate mineral species from the related malachite, 4[Cu2(OH)2CO3].Type material is preserved in the government collection at the Government Chemical Laboratories, Perth, Western Australia.

The unit cell and space-group of alamosite (PbSiO3)

1952 ◽  
Vol 29 (218) ◽  
pp. 933-935 ◽  
Author(s):  
A. L. Mackay
Keyword(s):  
Natural History ◽  
Chemical Analysis ◽  
British Museum ◽  
Original Description ◽  
Unit Cell ◽  
Refractive Indices ◽  
Space Group ◽  
X Ray ◽  
Ray Methods ◽  
Very High

Alamosite was first described by Palachc and Merwin, i who thought it might be isomorphous with wollastolfite. For that reason it has been re-examined, using X-ray methods.A specimen from the original locality at Alamos, Sonora, Mexico (B.M. 1910,330) was made available through the courtesy of the British Museum (Natural History), and in physical appearance it tallied with the original description. The crystals were aggregates of fibres arranged in bundles which cleaved perfectly perpendicular to the fibre axes. Small tablets could be readily cut out for X-ray analysis. The refractive indices were very high and the dispersion was large. As the axial ratios found by X-ray methods agreed with those given by Palache and Merwin, the latter's chemical analysis and density determination were not repeated.

The crystal structure of klyuchevskite, K3Cu3(Fe,Al)O2(SO4)4, a new mineral from Kamchatka volcanic sublimates

1992 ◽  
Vol 56 (384) ◽  
pp. 411-416 ◽  
Author(s):  
M. G. Gorskaya ◽  
S. K. Filatov ◽  
I. V. Rozhdestvenskaya ◽  
L. P. Vergasova
Keyword(s):  
Crystal Structure ◽  
Optical Properties ◽  
Physical Properties ◽  
Unit Cell ◽  
New Mineral ◽  
Strong Anisotropy ◽  
Structural Analogue ◽  
Optical Indicatrix ◽  
Space Group ◽  
Perfect Cleavage

AbstractThe crystal structure of klyuchevskite, K3Cu3(Fe,Al)O2(SO4)4, was determined in space group I2 using the total of 715 independent reflections up to R 0.12. Klyuchevskite is a structural analogue of piypite (caratiite) K4Cu4O2(SO4)4MeCl with the substitution K+ + Cu2+ → (Fe3+,Al) + MeCl. Compared to piypite, the ordering of Cu2+ and Fe3+ cations in the klyuchevskite structure results in the distortion of the unit cell and in lowering the symmetry of the chains to 1.This brings about a more compact packing of the chains. The chain-like arrangement of the structure determines physical properties of the mineral, its acicular habit, perfect cleavage, strong anisotropy of optical properties and orientation of optical indicatrix.

The fibrous zeolite erionite; its occurrence, unit cell, and structure

1959 ◽  
Vol 32 (247) ◽  
pp. 261-281 ◽  
Author(s):  
Lloyd W. Staples ◽  
J. A. Gard
Keyword(s):  
Electron Diffraction ◽  
Chemical Analysis ◽  
Unit Cell ◽  
Original Material ◽  
Space Group ◽  
X Ray ◽  
Rotation Pattern ◽  
Structure Factors ◽  
Atomic Cell ◽  
Fibre Rotation

SummaryThe type locality for erionite has been identified and specimens compared with Eakle's original material. New determinations of the physical properties and a chemical analysis have been made. Correlation of X-ray powder and fibre rotation data with electron diffraction of single crystals has shown that the unit cell is hexagonal with a 13·26, c 15·12 Å., space-group P31c, P¯31c, P63mc, P¯62c, or P63/mmc, giving a calculated sp. Gr. of 2·07 and atomic cell contents (Ca, Mg, Na2, K2)4·5Al9Si27O72.27H2O. A structure is proposed for the aluminosilicate frame, with space-group P63/mmc, which gives satisfactory correlation between observed and calculated structure factors for the X-ray fibre rotation pattern.

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