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See detailCNMNC guidelines for the use of suffixes and prefixes in mineral nomenclature, and for the preservation of historical names.
Hatert, Frédéric ULg; Mills, Stuart; Pasero, Marco et al

in European Journal of Mineralogy (2013), 25

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See detailIMA Commission on New Minerals, Nomenclature and Classification (CNMNC), Newsletter 14. New minerals and nomenclature modifications approved in 2012.
Williams, Pete; Hatert, Frédéric ULg; Pasero, Marco et al

in Mineralogical Magazine (2012), 76(5), 1281-1288

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See detailIMA Commission on New Minerals, Nomenclature and Classification (CNMNC), Newsletter 13. New minerals and nomenclature modifications approved in 2012.
Williams, Pete; Hatert, Frédéric ULg; Pasero, Marco et al

in Mineralogical Magazine (2012), 76(3), 807-817

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See detailIMA Commission on New Minerals, Nomenclature and Classification (CNMNC), Newsletter 12. New minerals and nomenclature modifications approved in 2012.
Williams, Pete; Hatert, Frédéric ULg; Pasero, Marco et al

in Mineralogical Magazine (2012), 76(1), 151-155

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See detailCommission on New Minerals, Nomenclature and Classification (CNMNC), Newsletter 10
Williams; Hatert, Frédéric ULg; Pasero, Marco et al

in Mineralogical Magazine (2011), 75(5), 2549-2561

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See detailIMA Commission on New Minerals, Nomenclature and Classification (CNMNC), Newsletter 11. New minerals and nomenclature modifications approved in 2011.
Williams, Pete; Hatert, Frédéric ULg; Pasero, Marco et al

in Mineralogical Magazine (2011), 75(6), 2887-2893

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See detailIMA Commission on New Minerals, Nomenclature and Classification (CNMNC), Newsletter 9
Williams, Pete; Hatert, Frédéric ULg; Pasero, Marco et al

in Mineralogical Magazine (2011), 75(4), 2535-2540

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See detailIMA Commission on New Minerals, Nomenclature and Classification (CNMNC), Newsletter 8
Williams, Pete; Hatert, Frédéric ULg; Pasero, Marco et al

in Mineralogical Magazine (2011), 75(2), 289-294

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See detailIMA Commission on New Minerals, Nomenclature and Classification (CNMNC), Newsletter 7
Williams, Pete; Hatert, Frédéric ULg; Pasero, Marco et al

in Mineralogical Magazine (2011), 75(1), 27-31

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See detailIMA Commission on New Minerals, Nomenclature and Classification (CNMNC), Newsletter 6
Williams, Pete; Hatert, Frédéric ULg; Pasero, Marco et al

in Mineralogical Magazine (2010), 74(6), 941-942

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See detail. IMA Commission on New Minerals, Nomenclature and Classification (CNMNC), Newsletter 4
Williams, Pete; Hatert, Frédéric ULg; Pasero, Marco et al

in Mineralogical Magazine (2010), 74(4), 798-800

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See detailIMA Commission on New Minerals, Nomenclature and Classification (CNMNC), Newsletter 2
Williams, Pete; Hatert, Frédéric ULg; Pasero, Marco et al

in Mineralogical Magazine (2010), 74

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See detailIMA Commission on New Minerals, Nomenclature and Classification (CNMNC), Newsletter 5
Williams, Pete; Hatert, Frédéric ULg; Pasero, Marco et al

in Mineralogical Magazine (2010), 74(5), 899-902

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See detailIMA Commission on New Minerals, Nomenclature and Classification (CNMNC), Newsletter 3
Williams, Pete; Hatert, Frédéric ULg; Pasero, Marco et al

in Mineralogical Magazine (2010), 74

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See detailPumpellyite-(Al), a new mineral from Bertrix, Belgian Ardennes
Hatert, Frédéric ULg; Pasero, Marco; Perchiazzi, Natale et al

in European Journal of Mineralogy (2007), 19(2, MAR-APR), 247-253

Pumpellyite-(Al), ideally Ca-2(Al,Fe2+,Mg)Al-2(SiO4)(Si2O7)(OH,O)(2)center dot H2O, is a newly approved mineral species from Bertrix, Ardennes mountains, Belgium. It occurs as radiating fibrous aggregates ... [more ▼]

Pumpellyite-(Al), ideally Ca-2(Al,Fe2+,Mg)Al-2(SiO4)(Si2O7)(OH,O)(2)center dot H2O, is a newly approved mineral species from Bertrix, Ardennes mountains, Belgium. It occurs as radiating fibrous aggregates reaching 5 mm in diameter, constituted by acicular crystals associated with calcite, K-feldspar and chlorite. Pumpellyite-(Al) is transparent to translucent and exhibits an emerald-green to white colour, sometimes with bluish tinges. The lustre is vitreous and the streak is colourless. The mineral is non-fluorescent, brittle, and shows a perfect {100} cleavage. The estimated Mobs hardness is 51/2, and the calculated density is 3.24 g/cm(3). Pumpellyite-(Al) is biaxial positive, alpha = 1.678(2), beta = 1.680(2), gamma = 1.691 (1) (lambda = 590 nm), colourless in thin section, 2V = 46 degrees, Y = b, no dispersion. Electron-microprobe analyses gave SiO2 37.52, Al2O3 25.63, MgO 1.99, FeO 4.97, MnO 0.11, CaO 23.21, BaO 0.01, Na2O 0.03, K2O 0.02, H2Ocalc. 6.71, total 100.20 wt. %. The resulting empirical formula, calculated on the basis of 8 cations, is (Ca1.99Na0.01)(Sigma 2.00)(Al0.42Fe0.332+Mg0.24Mn0.01)(Sigma 1.00)Al-2.00(SiO4)(Si2O7)(2.42) center dot 0.58H(2)O. The simplified formula is Ca2AlAl2(SiO4)(Si2O7)(OH)(3), which requires SiO2 38.16, Al2O3 32.38, CaO 23.74, H2O 5.72, Total 100.00 wt. %. The unit-cell parameters, refined from X-ray powder diffraction data, are: a = 8.818(2), b = 5.898(2), c = 19.126(6) angstrom, beta = 97.26(3)degrees, V = 986.7(4) angstrom(3), space group A2/m. The eight strongest lines in the powder pattern [d-values(in angstrom)(I)(hkl)] are: 4.371(65)(200), 3.787(80)(202), 3.040(70)(204), 2.912(95)(300), 2.895(100)(30 (2) over bar), 2.731(40)(20 (6) over bar), 2.630(35)(31 (1) over bar), 2.191(45)(40 (2) over bar). Pumpellyite-(Al) belongs to the pumpellyite group, and corresponds to the Al-rich compositions where the M1 and M2 sites contain Al as predominant cation. The crystal structure of pumpellyite-(Al) has been refined by the Rietveld method, based on an X-ray powder diffraction pattern, to R-Bragg = 7.09 %. The infrared spectrum is similar to those of minerals of the pumpellyite group. The mineral species and name were approved by the Commission on New Minerals and Mineral Names, IMA (no. 2005-016). [less ▲]

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See detailGraulichite-(Ce), a new arsenate mineral from the Stavelot Massif, Belgium
Hatert, Frédéric ULg; Pasero, Marco; Fransolet, André-Mathieu ULg et al

in European Journal of Mineralogy (2003), 15(4, JUL-AUG), 733-739

Graulichite-(Ce), ideally CeFe33+(AsO4)(2)(OH)(6), is a new mineral species from Hourt, Stavelot Massif, Belgium. It occurs in the most altered parts of a Devillian quartzite (Lower to Middle Cambrian ... [more ▼]

Graulichite-(Ce), ideally CeFe33+(AsO4)(2)(OH)(6), is a new mineral species from Hourt, Stavelot Massif, Belgium. It occurs in the most altered parts of a Devillian quartzite (Lower to Middle Cambrian), in close association with arsenopyrite, scorodite, mimetite, pharmacosiderite, and goethite. Graulichite-(Ce) forms 80 to 150 mum spherical aggregates of rhombohedral crystals, 50 to 80 mum length, which show the forms {10 (1) over bar2} and {10 (11) over bar}. The mineral is transparent and exhibits a light-green to brownish colour, with a resinous lustre. It is non-fluorescent and shows an irregular fracture, without any perceptible cleavage. The calculated density is 4.42 g/cm(3). Graulichite-(Ce) is uniaxial negative, with a mean refractive index close to 1.97(1) (lambda=590 nm), pleochroic from light green to yellowish. Electron microprobe analyses gave As2O5 31.20, P2O5 0.03, SO3 0.06, SiO2 0.03, Al2O3 3.09, Fe2O3 30.65, SrO 0.24, PbO 0.07, BaO 3.95, CaO 0.03, La2O3 2.26, Ce2O3 15.73, Nd2O3 2.08, H2O (calc.) 8.37, total 97.79 wt. %. The resulting empirical formula, calculated on the basis of 6 cations, is (Ce0.67Ba0.18La0.10Nd0.09Sr0.02)(Sigma1.06) (Fe2.683+Al0.42)(Sigma3.10)[(As(1.89)S(.001)square(0.10))(Sigma2.00)O-8][(OH)(5.57)(H2O)(0.43)](Sigma6.00). The single-crystal unit-cell parameters are a=7.288(2) and c=16.812(9) Angstrom, space group R (3) over barm. The seven strongest lines in the X-ray powder-diffraction pattern [d(in Angstrom)(I)(hkil)] are: 3.052(100)(11 (2) over bar3), 3.636(40)(11 (2) over bar0), 2.239(35)(10 (1) over bar7), 1.817(35)(22 (4) over bar0), 2.792(30)(0006), 5.906(25)(10 (1) over bar1), 1.968(25)(30 (3) over bar3). Graulichite-(Ce) is the iron analogue of arsenoflorencite-(Ce), and belongs to the crandallite mineral group, with the alunite-type structure. The crystal structure of graulichite-(Ce) has been refined, based on single-crystal X-ray diffraction data, to R=0.048. [less ▲]

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