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3 New Species descriptions from CM
Posted by Jim Ferraiolo
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Jim Ferraiolo
3 New Species descriptions from CM December 09, 2003 02:48PM |
<HTML>Kupčíkite, Cu3.4Fe0.6Bi5S10, a new Cu–Bi sulfosalt from Felbertal, Austria, and its crystal structure
Dan Topa, Emil Makovicky, Tonči Balić-Žunić and Werner H. Paar
CanMin 41,1155-1166(2003)
Abstract: Kupcikite, Cu3.4Fe0.6Bi5S10, a new mineral species, is found in the scheelite deposit of Felbertal, Austria, in a quartz gangue, in association with chalcopyrite, pyrrhotite, molybdenite, sphalerite and native bismuth, intergrown with makovickyite, cupromakovickyite, hodrushite, cuprobismutite and derivatives of the bismuthinite-Vaikinite series. The mineral is grey with metallic luster, brittle, and without cleavage. Mean micro-indentation hardness is 192 kg/mm2 (Mohs hardness 3.3), and the calculated density is 6.42 g/cm3. In reflected light, it is grayish white; the anisotropy is moderate in air and strong in oil, and it does not show internal reflections. Reflectance values (in %)in air are, for R1 and R2, 33.55, 40.56 at 470 nm, 33.92, 41.14 at 546 nm, 34.16, 41.35 at 589 nm, and 34.2, 41.32 at 650 nm. The average results of seven electron-microprobe analyses are:Cu 13.02, Fe 2.23, Ag 0.11, Cd 0.3, Bi 64.21, Sb 0.12, S 20.10, total 100.08 wt.%, corresponding to Fe0.64Cu3.29Ag0.015Cd0.045Sb0.015 Bi4.94S10.07 (basis:19 atoms per formula unit). The simplified formula, in accordance with the crystal-structure analysis, is Fe0.6Cu3.4Bi5S10. The crystal structure was solved, to R =4.1%, from single-crystal data obtained on a four-circle diffractometer with an area detector. Kupcikite has a monoclinic cell with a 17.512(2), b 3.9103(4), c 12.869(1)Å, β 108.56(1)°, V 835.4(1)Å3 , space group C2/m , with Z=2. The strongest lines in the calculated powder-diffraction pattern [d in Å (I)(hkl )] are::6.028(4)(201), 3.596(7)(401), 3.213(4)(204), 3.128(10)(112), 3.071(7)(312), and 2.683(5)(113). Its structure corresponds to the structure of synthetic Cu4Bi5S10; the (Cu, Fe)position in the mineral is distinctly split. Kupcikite is closely structurally related to cuprobismutite and hodrushite. It is the N=1 member of the cuprobismutite series, whereas cuprobismutite is the N=2 member. Hodrushite is composed of a regular 1:1 intergrowth of Kupcikite-like and cuprobismutite-like layers. In typical intergrowths with makovickyite or hodrushite, Kupcikite shows sharp straight boundaries with both of these phases, but where in contact with derivatives of the bismuthinite ¡Vaikinite series, the latter replace Kupcikite. In a rare occurrence of Kupcikite with cuprobismutite in the same aggregate, the cuprobismutite is replaced by Kupcikite.
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Vasilyevite, (Hg2)2+ 10O6I3Br2Cl(CO3), a new mineral species from the Clear Creek Claim, San Benito County, California
Andrew C. Roberts, Mark A. Cooper, Frank C. Hawthorne, John A.R. Stirling, Werner H. Paar, Chris J. Stanley, Gail E. Dunning, and Peter C. Burns
CanMin 41,1167-1172 (2003)
Abstract: Vasilyevite, a new mineral species of ideal composition (involving complete anion order) (Hg2)2+10O6I3Br2Cl(CO3), is triclinic, P1, with unit-cell parameters measured on a single-crystal X-ray diffractometer: a 9.344(2), b 10.653(2), c 18.265(4) Å, α 93.262(5), β 90.548(4), γ 115.422(4)°, V 1638.3(9) Å3 , a:b:c 0.8771:1:1.7145, Z = 2. The strongest seven lines of the X-ray powder-diffraction pattern [d in Å(I)(hkl)] are: 7.645(60)(111), 4.205(80)(014), 3.296(50)(115,105), 3.132(90)(123,133), 2.894(100)(312,322), 2.722(80)(124) and 2.629(50)(130,140). The mineral has been identified on five micromount specimens collected from a small prospect pit within the dumps surrounding the long-abandoned Clear Creek mercury mine, New Idria district, San Benito County, California. It is most closely associated with native mercury, eglestonite, montroydite, cinnabar and an undefined Hg oxyhalide in a host rock principally composed of quartz and ferroan magnesite. Vasilyevite occurs in small shallow quartz-lined vugs as anhedral cryptocrystalline masses, less than 0.5 mm in size, and as a somewhat elongate spheroidal anhedral mass, 0.3 mm in diameter, which is partly hollow and has a shell thickness of approximately 30 µm. The mineral is silvery grey to black to dark red-black with a red-brown streak. Physical properties include: adamantine to metallic luster, opaque to translucent (on very thin edges), nonfluorescent, no cleavage, very brittle, uneven fracture, estimated hardness approximately 3, density 9.57 g/cm3 (calculated from chemical formula and unit-cell parameters derived from crystal structure). In polished section, vasilyevite is weakly bireflectant, nonpleochroic and moderately to strongly anisotropic in green, blue and grey tints. In reflected plane-polarized light, it is grey to white with abundant orange-red to blood-red internal reflections. Measured values of reflectance obtained in air and in oil for a single fragment are tabulated. Averaged and corrected results of electron-microprobe analyses yield Hg2O 89.1, I 7.0, Br 2.5, Cl 0.6, CO2 [0.8] (from crystal structure), S 0.1, sum 100.1, less O = I + Br + Cl + S 0.88, total 99.22 wt.%, corresponding to Hg1+20.82O6.85I2.69(Br1.52Cl0.82)Σ2.34[(CO3)0.89S2– 0.15]Σ1.04, based on O + I + Br + Cl + S = 14.7 apfu (atoms per formula unit), as determined from the crystal structure. The original value for Hg, 85.7 wt.%, was converted to Hg2O after the crystal structure was determined. The infrared-absorption spectrum confirms the presence of CO3. The mineral name honors V.I. Vasilyev of the Institute of Geology of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia, for his contributions to the study of new and rare Hg-bearing minerals.
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Ganterite, a new barium-dominant analogue of muscovite from the Berisal Complex, Simplon Region, Switzerland
Stefan Graeser, Callum J. Hetherington, and Reto Gieré
CanMin 41, 1271-1280 (2003)
Abstract: Ganterite, [Ba0.5(Na,K)0.5]Al2(Si2.5Al1.5O10)(OH)2, the barium-dominant analogue of muscovite, was discovered in the crystalline basement rocks of the Berisal Complex, Simplon Region, Switzerland. Examples of this new rock-forming mica are found in bands and lenses of white-mica schist, and in a leucocratic zoisite–celsian gneiss. Samples of the schist, and especially of the celsian-bearing gneiss, are characterized by high whole-rock Ba contents of up to 15 wt.% BaO. The mineral paragenesis consists of zoisite, quartz, plagioclase, apatite, zircon and amphibole in the schist, and zoisite, celsian, quartz, margarite ± armenite in the gneiss. Ganterite is light grey to silver, has a vitreous luster, a perfect {001} cleavage, a laminated fracture, and a flexible tenacity. Mohs hardness, determined from micro-hardness indentations, is 4–4½. The mica is biaxial (–), α 1.600 (calc.), β 1.619, γ 1.622, and 2V(meas.) equal to 42.5 ± 2°. The calculated density of the most Ba-rich ganterite is 3.11 g/cm3. Single crystals typically are 0.5 by 0.15 mm (or less), and occur in small bands, lenses or clusters 0.5 to 10 cm in thickness. Ganterite is monoclinic, space group C2/c, Z = 4, a 5.212(1), b 9.046(2), c 19.978(4) Å, β 95°48', V 937.6 Å3, corresponding to a 2M1 polytype. The strongest seven powder-diffraction lines [d in Å(I)(hkl)] are: 2.571(100)(131,202), 2.602(95)(130,131), 1.5054(91)(060,2010), 3.737(77)(023), 3.887(76)(113), 4.481(71)(110), and 3.495 (71)(114). The new mineral species is named after the geographical region in which it was found.</HTML>
Dan Topa, Emil Makovicky, Tonči Balić-Žunić and Werner H. Paar
CanMin 41,1155-1166(2003)
Abstract: Kupcikite, Cu3.4Fe0.6Bi5S10, a new mineral species, is found in the scheelite deposit of Felbertal, Austria, in a quartz gangue, in association with chalcopyrite, pyrrhotite, molybdenite, sphalerite and native bismuth, intergrown with makovickyite, cupromakovickyite, hodrushite, cuprobismutite and derivatives of the bismuthinite-Vaikinite series. The mineral is grey with metallic luster, brittle, and without cleavage. Mean micro-indentation hardness is 192 kg/mm2 (Mohs hardness 3.3), and the calculated density is 6.42 g/cm3. In reflected light, it is grayish white; the anisotropy is moderate in air and strong in oil, and it does not show internal reflections. Reflectance values (in %)in air are, for R1 and R2, 33.55, 40.56 at 470 nm, 33.92, 41.14 at 546 nm, 34.16, 41.35 at 589 nm, and 34.2, 41.32 at 650 nm. The average results of seven electron-microprobe analyses are:Cu 13.02, Fe 2.23, Ag 0.11, Cd 0.3, Bi 64.21, Sb 0.12, S 20.10, total 100.08 wt.%, corresponding to Fe0.64Cu3.29Ag0.015Cd0.045Sb0.015 Bi4.94S10.07 (basis:19 atoms per formula unit). The simplified formula, in accordance with the crystal-structure analysis, is Fe0.6Cu3.4Bi5S10. The crystal structure was solved, to R =4.1%, from single-crystal data obtained on a four-circle diffractometer with an area detector. Kupcikite has a monoclinic cell with a 17.512(2), b 3.9103(4), c 12.869(1)Å, β 108.56(1)°, V 835.4(1)Å3 , space group C2/m , with Z=2. The strongest lines in the calculated powder-diffraction pattern [d in Å (I)(hkl )] are::6.028(4)(201), 3.596(7)(401), 3.213(4)(204), 3.128(10)(112), 3.071(7)(312), and 2.683(5)(113). Its structure corresponds to the structure of synthetic Cu4Bi5S10; the (Cu, Fe)position in the mineral is distinctly split. Kupcikite is closely structurally related to cuprobismutite and hodrushite. It is the N=1 member of the cuprobismutite series, whereas cuprobismutite is the N=2 member. Hodrushite is composed of a regular 1:1 intergrowth of Kupcikite-like and cuprobismutite-like layers. In typical intergrowths with makovickyite or hodrushite, Kupcikite shows sharp straight boundaries with both of these phases, but where in contact with derivatives of the bismuthinite ¡Vaikinite series, the latter replace Kupcikite. In a rare occurrence of Kupcikite with cuprobismutite in the same aggregate, the cuprobismutite is replaced by Kupcikite.
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Vasilyevite, (Hg2)2+ 10O6I3Br2Cl(CO3), a new mineral species from the Clear Creek Claim, San Benito County, California
Andrew C. Roberts, Mark A. Cooper, Frank C. Hawthorne, John A.R. Stirling, Werner H. Paar, Chris J. Stanley, Gail E. Dunning, and Peter C. Burns
CanMin 41,1167-1172 (2003)
Abstract: Vasilyevite, a new mineral species of ideal composition (involving complete anion order) (Hg2)2+10O6I3Br2Cl(CO3), is triclinic, P1, with unit-cell parameters measured on a single-crystal X-ray diffractometer: a 9.344(2), b 10.653(2), c 18.265(4) Å, α 93.262(5), β 90.548(4), γ 115.422(4)°, V 1638.3(9) Å3 , a:b:c 0.8771:1:1.7145, Z = 2. The strongest seven lines of the X-ray powder-diffraction pattern [d in Å(I)(hkl)] are: 7.645(60)(111), 4.205(80)(014), 3.296(50)(115,105), 3.132(90)(123,133), 2.894(100)(312,322), 2.722(80)(124) and 2.629(50)(130,140). The mineral has been identified on five micromount specimens collected from a small prospect pit within the dumps surrounding the long-abandoned Clear Creek mercury mine, New Idria district, San Benito County, California. It is most closely associated with native mercury, eglestonite, montroydite, cinnabar and an undefined Hg oxyhalide in a host rock principally composed of quartz and ferroan magnesite. Vasilyevite occurs in small shallow quartz-lined vugs as anhedral cryptocrystalline masses, less than 0.5 mm in size, and as a somewhat elongate spheroidal anhedral mass, 0.3 mm in diameter, which is partly hollow and has a shell thickness of approximately 30 µm. The mineral is silvery grey to black to dark red-black with a red-brown streak. Physical properties include: adamantine to metallic luster, opaque to translucent (on very thin edges), nonfluorescent, no cleavage, very brittle, uneven fracture, estimated hardness approximately 3, density 9.57 g/cm3 (calculated from chemical formula and unit-cell parameters derived from crystal structure). In polished section, vasilyevite is weakly bireflectant, nonpleochroic and moderately to strongly anisotropic in green, blue and grey tints. In reflected plane-polarized light, it is grey to white with abundant orange-red to blood-red internal reflections. Measured values of reflectance obtained in air and in oil for a single fragment are tabulated. Averaged and corrected results of electron-microprobe analyses yield Hg2O 89.1, I 7.0, Br 2.5, Cl 0.6, CO2 [0.8] (from crystal structure), S 0.1, sum 100.1, less O = I + Br + Cl + S 0.88, total 99.22 wt.%, corresponding to Hg1+20.82O6.85I2.69(Br1.52Cl0.82)Σ2.34[(CO3)0.89S2– 0.15]Σ1.04, based on O + I + Br + Cl + S = 14.7 apfu (atoms per formula unit), as determined from the crystal structure. The original value for Hg, 85.7 wt.%, was converted to Hg2O after the crystal structure was determined. The infrared-absorption spectrum confirms the presence of CO3. The mineral name honors V.I. Vasilyev of the Institute of Geology of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia, for his contributions to the study of new and rare Hg-bearing minerals.
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Ganterite, a new barium-dominant analogue of muscovite from the Berisal Complex, Simplon Region, Switzerland
Stefan Graeser, Callum J. Hetherington, and Reto Gieré
CanMin 41, 1271-1280 (2003)
Abstract: Ganterite, [Ba0.5(Na,K)0.5]Al2(Si2.5Al1.5O10)(OH)2, the barium-dominant analogue of muscovite, was discovered in the crystalline basement rocks of the Berisal Complex, Simplon Region, Switzerland. Examples of this new rock-forming mica are found in bands and lenses of white-mica schist, and in a leucocratic zoisite–celsian gneiss. Samples of the schist, and especially of the celsian-bearing gneiss, are characterized by high whole-rock Ba contents of up to 15 wt.% BaO. The mineral paragenesis consists of zoisite, quartz, plagioclase, apatite, zircon and amphibole in the schist, and zoisite, celsian, quartz, margarite ± armenite in the gneiss. Ganterite is light grey to silver, has a vitreous luster, a perfect {001} cleavage, a laminated fracture, and a flexible tenacity. Mohs hardness, determined from micro-hardness indentations, is 4–4½. The mica is biaxial (–), α 1.600 (calc.), β 1.619, γ 1.622, and 2V(meas.) equal to 42.5 ± 2°. The calculated density of the most Ba-rich ganterite is 3.11 g/cm3. Single crystals typically are 0.5 by 0.15 mm (or less), and occur in small bands, lenses or clusters 0.5 to 10 cm in thickness. Ganterite is monoclinic, space group C2/c, Z = 4, a 5.212(1), b 9.046(2), c 19.978(4) Å, β 95°48', V 937.6 Å3, corresponding to a 2M1 polytype. The strongest seven powder-diffraction lines [d in Å(I)(hkl)] are: 2.571(100)(131,202), 2.602(95)(130,131), 1.5054(91)(060,2010), 3.737(77)(023), 3.887(76)(113), 4.481(71)(110), and 3.495 (71)(114). The new mineral species is named after the geographical region in which it was found.</HTML>
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Marco Ciriotti
Re: 3 New Species descriptions from CM December 09, 2003 04:09PM |
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Marco Ciriotti
Re: 3 New Species descriptions from CM December 09, 2003 04:20PM |
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Jim Ferraiolo
Re: 3 New Species descriptions from CM December 09, 2003 05:20PM |
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Marco Ciriotti
Re: 3 New Species descriptions from CM December 09, 2003 07:11PM |
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Marco Ciriotti
Re: 3 New Species descriptions from CM December 09, 2003 07:19PM |
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Marco Ciriotti
Re: 3 New Species descriptions from CM December 09, 2003 07:29PM |
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Jim Ferraiolo
Re: 3 New Species descriptions from CM December 09, 2003 07:56PM |
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Marco Ciriotti
Re: 3 New Species descriptions from CM December 09, 2003 08:36PM |
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A. AFALFIZ
votre article (ganterite,celsian) 2003 January 18, 2004 08:32AM |
<HTML>mesieurs, bonjour
je voudrais recevoir si c'est possible un exemplaire de votre article traitant des micas à barium et celsian paru dans canadian mineralogist (octobre 2003).
ça m'interesse beaucoup car je travaille actuellement sur des sujets similaire dans le socle métamorphique du NW de l'afrique (Nord Algérie). je voudrais bien avoir des relations de recherches scientifiques avec vous.
salutations
A.AFALFIZ - université D'ALGER.</HTML>
je voudrais recevoir si c'est possible un exemplaire de votre article traitant des micas à barium et celsian paru dans canadian mineralogist (octobre 2003).
ça m'interesse beaucoup car je travaille actuellement sur des sujets similaire dans le socle métamorphique du NW de l'afrique (Nord Algérie). je voudrais bien avoir des relations de recherches scientifiques avec vous.
salutations
A.AFALFIZ - université D'ALGER.</HTML>
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Marco E. Ciriotti
Re: votre article (ganterite,celsian) 2003 January 18, 2004 11:05AM |
<HTML>Cher Dr. Afalfiz,
c'est avec plaisir que je vous passe l'article sur la ganterite.
Vous le trouverez dans votre e-mail privé.
Pour une eventuelle collaboration vous devez contacter directement un des auteurs (par exemple Reto Gieré
e-mail: giere@purdue.edu
ou Callum J. Hetherington:
e-mail: callum.hetherington@nhm.uio.no).
Ils parlent francais.
Mes salutations les plus distinguées.
Marco E. Ciriotti</HTML>
c'est avec plaisir que je vous passe l'article sur la ganterite.
Vous le trouverez dans votre e-mail privé.
Pour une eventuelle collaboration vous devez contacter directement un des auteurs (par exemple Reto Gieré
e-mail: giere@purdue.edu
ou Callum J. Hetherington:
e-mail: callum.hetherington@nhm.uio.no).
Ils parlent francais.
Mes salutations les plus distinguées.
Marco E. Ciriotti</HTML>
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