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See detailNew Minerals, Nomenclature and Classification (CNMNC), Newsletter 36. New minerals and nomenclature modifications approved in 2016 and 2017
Halenius, U; Hatert, Frédéric ULiege; Pasero, M et al

in European Journal of Mineralogy (2017), 29

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See detailNew Minerals, Nomenclature and Classification (CNMNC), Newsletter 35. New minerals and nomenclature modifications approved in 2016 and 2017
Halenius, U; Hatert, Frédéric ULiege; Pasero, M et al

in European Journal of Mineralogy (2017), 29

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See detailCrystal structure of bassetite and saléeite: new insight into autunite-group minerals
Dal Bo, Fabrice ULiege; Hatert, Frédéric ULiege; Mees, Florias et al

in European Journal of Mineralogy (2016)

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See detailCrystal structure of arsenuranospathite from Rabejac, Lodève, France
Dal Bo, Fabrice ULiege; Hatert, Frédéric ULiege; Baijot, Maxime ULiege et al

in European Journal of Mineralogy (2015), 27

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See detailHydrothermal transformations of triphylite from the Nanping No. 31 pegmatite dyke, Southeastern China.
RAO; Wang, R; Hatert, Frédéric ULiege et al

in European Journal of Mineralogy (2014), 26

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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 ULiege; Mills, Stuart; Pasero, Marco et al

in European Journal of Mineralogy (2013), 25

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See detailChukhrovite-(Ca), Ca4.5Al2(SO4)F13•12H2O, a new mineral species from the Val Cavallizza Pb-Zn-(Ag) mine, Cuasso al Monte, Varese province, Italy.
Vignola, Pietro; Hatert, Frédéric ULiege; Bersani, D et al

in European Journal of Mineralogy (2012), 24

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See detailQingheiite-(Fe2+), Na2Fe2+MgAl(PO4)3, a new phosphate mineral from the Sebastião Cristino pegmatite, Minas Gerais, Brazil
Hatert, Frédéric ULiege; Baijot, Maxime ULiege; Philippo, Simon et al

in European Journal of Mineralogy (2010), 22

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See detailPb3Fe3+2(PO4)4(H2O), a new octahedral-tetrahedral framework structure with double-strand chains
Mills, Stuart; Kolitsch, Uwe; Miyawaki, R. et al

in European Journal of Mineralogy (2010), 22

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See detailGramaccioliite-(Y): paragenesis, chemical, structural, thermal expansion, and compressibility data on a new occurrence from Samos Island, Greece
Theye, Thomas; Hatert, Frédéric ULiege; Ockenga, E. et al

in European Journal of Mineralogy (2010), 22

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See detailNielsbohrite, a new potassium uranly arsenate from the uranium deposit of Menzenschwand in the Southern Black Forest, Germany
Walenta, K.; Hatert, Frédéric ULiege; Theye, Thomas et al

in European Journal of Mineralogy (2009), 21

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See detailThe standardisation of mineral group hierarchies: application to recent nomenclature proposals.
Mills, Stuart J.; Hatert, Frédéric ULiege; Nickel, Ernie et al

in European Journal of Mineralogy (2009), 21

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See detailTi substitution mechanisms in phlogopites from the Suwalki massif-type anorthosite, NE Poland
Namur, Olivier ULiege; Hatert, Frédéric ULiege; Grandjean, Fernande ULiege et al

in European Journal of Mineralogy (2009), 21

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See detailGranitic pegmatites: the State of the Art. Preface.
Lima, Alexandre; Pesquera, Alfonso; Roda-Robles, Encarnacion ULiege et al

in European Journal of Mineralogy (2008)

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See detailThe crystal structure of sursassite from the Lienne valley, Stavelot Massif, Belgium
Hatert, Frédéric ULiege; Fransolet, André-Mathieu ULiege; Wouters, Johan et al

in European Journal of Mineralogy (2008), 20

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See detailPumpellyite-(Al), a new mineral from Bertrix, Belgian Ardennes
Hatert, Frédéric ULiege; 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 detailHydrothermal synthesis and crystal structure of Na(Na,Mn)(7)Mn-22(PO4)(18)0.5H(2)O, a new compound of fillowite structure type
Keller, Paul; Hatert, Frédéric ULiege; Lissner, Falk et al

in European Journal of Mineralogy (2006), 18(6), 765-774

The chemical compound Na(Na,Mn)(7)Mn-22(PO4)(18)center dot 0.5H(2)O was synthesized with a Tuttle pressure vessel at 800 degrees C and 1 kbar during experimental investigations on the conditions of ... [more ▼]

The chemical compound Na(Na,Mn)(7)Mn-22(PO4)(18)center dot 0.5H(2)O was synthesized with a Tuttle pressure vessel at 800 degrees C and 1 kbar during experimental investigations on the conditions of fillowite formation. The crystal structure of a single-crystal, space group R (No. 148), a = 15.2741(9), c = 43.334(3) angstrom, Z = 6, was determined from X-ray intensity data and refined up to R-1 = 0.0728 and R-l{FO > 4 sigma(FO)} = 0.0546. The crystal structure of Na(Na,Mn)(7)Mn-22(PO4)(18)center dot 0.5H(2)O is similar to the structure of fillowite, Na6Ca3(Mn,Fe)(21)(PO4)(18.), but a significant difference between the synthetic H2O containing compound and fillowite is the replacement of (Na12)O-8(-) by Mn(H2O)(2)O-5(-) polyhedra, which form characteristic six-member rings. The coordination polyhedra around Na12 and Mn12 are so different that simple isomorphous substitution of Na12 by Mn12 is very unlikely, but whole six-member rings either of (Na12)O-8(-) or (Mn12)(H2O)(2)O-5 polyhedra seem to be distributed statistically over the crystal structure. No indication for ordering, e.g. sheet by sheet, has been observed. Na(Na,Mn)(7)Mn-22(PO4)(18)center dot 0.5H(2)O is the first fillowite-like compound for which water is located in the structure from single-crystal study. This result is proved by infrared spectral data and indicates that water can play an essential role in the fillowite structure-type. Structural features of the synthetic compounds Na(Na,Mn)(7)Mn-22(PO4)(18)center dot 0.5H(2)O, Na4Ca4Mg21(PO4)(18) and fillowite are compared. [less ▲]

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See detailA structural, infrared, and Mossbauer spectral study of rosemaryite, NaMnFe3+Al(PO4)(3)
Hatert, Frédéric ULiege; Hermann, R. P.; Fransolet, André-Mathieu ULiege et al

in European Journal of Mineralogy (2006), 18(6, NOV-DEC), 775-785

Rosemaryite, ideally NaMnFe(3+)AI(PO4)(3), has been collected in the Buranga pegmatite, Rwanda. A single-crystal structure refinement was performed to R-1 = 4.01 %, in the P2(1)/n space group, with a = 12 ... [more ▼]

Rosemaryite, ideally NaMnFe(3+)AI(PO4)(3), has been collected in the Buranga pegmatite, Rwanda. A single-crystal structure refinement was performed to R-1 = 4.01 %, in the P2(1)/n space group, with a = 12.001(2), b = 12.396(1), c = 6.329(1) angstrom, beta 114.48(1)degrees, Vol. = 856.9(2) angstrom(3), Z = 4. The crystal structure and cation distributions are similar to those of ferrorosemaryite, NaFe2+Fe3+Al(PO4)(3), and qingheiite, Na2MnMgAl(PO4)(3), but aluminium predominantly occurs in the M(2a) site, not in the M(2b) site as observed in ferrowyllieite, Na2Fe22+Al(PO4)(3). The topologies of the X(1a) and X(1b) crystallographic sites are identical to those found in ferrorosemaryite, and correspond to a distorted octahedron and to a distorted cube, respectively. The [7+1]-coordinated X(2) site is a very distorted gable disphenoid, similar to the A(2)' site of the alluaudite structure. Mossbauer spectra have been obtained from 4.2 to 295 K, and fitted with a model including two Fe3+ and two Fe2+ doublets. The Fe2+ component corresponding to 2/3 of the Fe2+ spectral area and having a smaller quadrupole splitting of 2.63 mm/s at 15 K, is assigned to the Fe2+ on the M(2a) site, and the Fe2+ component with the larger quadrupole splitting of 3.17 mm/s at 15 K, is assigned to the Fe2+ on the M(1) site. Fe3+ is located only at the M(2a) and M(2b) sites, and the Fe3+ component corresponding to 3/4 of the Fe3+ and exhibiting the larger quadrupole spitting of 0.77 mm/s at 15 K, is most likely associated with Fe3+ on the M(2b) site. The infrared spectrum of rosemaryite shows absorption bands at 3450 and 1624 cm(-1), bands that arise from the vibrational modes of H2O and confirm the presence of water in the channels of the wyllieite structure. A comparison of both the Mossbauer spectra and structural data of rosemaryite with those of other phosphates of the alluaudite and wyllieite groups, is also presented. [less ▲]

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See detailFerrorosemaryite, NaFe2+Fe3+Al(PO4)3, a new phosphate mineral from the Rubindi pegmatite, Rwanda.
Hatert, Frédéric ULiege; Lefèvre, Pierre; Fransolet, André-Mathieu ULiege et al

in European Journal of Mineralogy (2005), 17

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