IMA 2018-101 = lussierite

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Marco E. Ciriotti
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IMA 2018-101 = lussierite

Messaggio da Marco E. Ciriotti » mar 04 giu, 2019 12:17

Prossima pubblicazione.

Referenza:
▪ Kampf, A.R., Olds, T.A., Plášil, J., Nash, B.P., Marty, J. (2019): Lussierite, a new sodium-uranyl-sulfate mineral with bidentate UO7–SO4 linkage from the Blue Lizard mine, San Juan County, Utah, USA. Mineralogical Magazine, 83, (in press).

Abstract:
The new mineral lussierite (IMA2018-101), Na10[(UO2)(SO4)4](SO4)2(H2O)3, was found in the Blue Lizard mine, San Juan County, Utah, USA, where it occurs as pale green- yellow prisms or blades in a secondary assemblage with belakovskiite, ferrinatrite, halite, ivsite, metavoltine and thenardite. The streak is white and the fluorescence is bright cyan under 365 nm ultraviolet light. Crystals are transparent with vitreous luster. The tenacity is brittle, the Mohs hardness is 2½, the fracture is irregular and no cleavage was observed. The mineral is easily soluble in H2O and has a measured density of 2.87(2) g·cm–3. Lussierite is optically biaxial (+), with α = 1.493(1), β = 1.505(1) and γ = 1.518(1) (white light); 2V (meas.) = 88(1)°; dispersion is r > v, moderate; pleochroism: X = colourless, Y and Z green yellow (X < Y ≈ Z); optical orientation: X = b, Z ^ a = 44° in obtuse β). Electron microprobe analyses (WDS mode) provided Na10(U0.99O2)(S1.00O4)6·3H2O (+0.06 H for charge balance). The five strongest X-ray powder diffraction lines are [dobs Å(I)(hkl)]: 6.69(95)(-111,130), 4.814(100)(150,002,060), 3.461(83)(171,-202), 2.955(81)(113,330) and 2.882(74)(-191,311,191,0·10·0). Lussierite is monoclinic, Cc, a = 9.3134(4), b = 28.7501(11), c = 9.6346(7) Å, β = 93.442(7)°, V = 2575.1(2) Å3 and Z = 4. The structure (R1 = 0.0298 for 5202 I > 2oI) contains a [(UO2)(SO4)4]6– uranyl sulfate cluster in which one SO4 tetrahedron shares an edge (bidentate linkage) with the UO7 pentagonal bipyramid. The uranyl sulfate clusters occur in layers and are linked through a complex network of bonds involving Na+ cations, isolated SO4 tetrahedra and isolated H2O groups.
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

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Marco E. Ciriotti
Messaggi: 26460
Iscritto il: ven 25 giu, 2004 11:31
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Re: IMA 2018-101 = lussierite

Messaggio da Marco E. Ciriotti » mar 04 giu, 2019 16:51

klaprothite family

Klaprothite Na6(UO2)(SO4)4·4H2O mon P21/c 9.8271 9.7452 20.8725 90.00 98.743 90.00 4 1975.66
Lussierite Na10[(UO2)(SO4)4](SO4)2(H2O)3 mon Cc 9.3134 28.750 9.6346 90.00 93.442 90.00 4 2575.1
Péligotite Na6(UO2)(SO4)4·4H2O tric P1 9.81511 9.9575 10.6289 88.680 73.990 89.205 2 998.22
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

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Marco E. Ciriotti
Messaggi: 26460
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
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Re: IMA 2018-101 = lussierite

Messaggio da Marco E. Ciriotti » sab 15 feb, 2020 12:29

Pubblicazione effettuata.

Referenza:
▪ Kampf, A.R., Olds, T.A., Plášil, J., Nash, B.P., Marty, J. (2019): Lussierite, a new sodium-uranyl-sulfate mineral with bidentate UO7–SO4 linkage from the Blue Lizard mine, San Juan County, Utah, USA. Mineralogical Magazine, 83, 799-808.
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

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