IMA 2017-052 = finchite

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Marco E. Ciriotti
Messaggi: 31675
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
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IMA 2017-052 = finchite

Messaggio da Marco E. Ciriotti » ven 04 mar, 2022 12:20

Prossima pubblicazione.

Referenza:
▪ Spano, T.L., Olds, T.A., Hall, S.M., Van Gosen, B.S., Kampf, A.R., Burns, P.C., Marty, J. (2023): Finchite, Sr(UO2)2(V2O8)·5H2O, a new uranyl sorovanadate with the francevillite anion topology. American Mineralogist, 108, (in press).

Fritzscheite group
Curienite Pb(U6+O2)2(V5+O4)2·5H2O
Finchite Sr(U6+O2)2(V5+O4)2·5H2O
Francevillite (Ba,Pb)(U6+O2)2(V5+O4)2·5H2O
Fritzscheite Mn2+(U6+O2)2[(V5+O4),(PO4)]2·4H2O
Metatyuyamunite Ca(U6+O2)2(V5+O4)2·3H2O
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: 31675
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 2017-052 = finchite

Messaggio da Marco E. Ciriotti » mer 01 feb, 2023 9:50

Pubblicazione avvenuta.

Referenza:
▪ Spano, T.L., Olds, T.A., Hall, S.M., Van Gosen, B.S., Kampf, A.R., Burns, P.C., Marty, J. (2023): Finchite, Sr(UO2)2(V2O8)·5H2O, a new uranyl sorovanadate with the francevillite anion topology. American Mineralogist, 108, 383-388.

Abstract:
Finchite (IMA2017-052), Sr(UO2)2(V2O8)·5H2O, is the first uranium mineral known to contain essential Sr. The new mineral occurs as yellow-green blades up to ~10 μm in length in surface outcrops of the calcrete-type uranium deposit at Sulfur Springs Draw, Martin County, Texas, U.S.A. Crystals of finchite were subsequently discovered underground in the Pandora mine, La Sal, San Juan County, Utah, U.S.A., as diamond-shaped golden-yellow crystals reaching up to 1 mm. The crystal structure of finchite from both localities was determined using single-crystal X‑ray diffraction and is orthorhombic, Pcan, with a = 10.363(6) Å, b = 8.498(5) Å, c = 16.250(9) Å, V = 1431.0(13) Å3, Z = 4 (R1 = 0.0555) from Sulfur Springs Draw; and a = 10.3898(16), b = 8.5326(14), c = 16.3765(3) Å, V = 1451.8(4) Å3, Z = 4 (R1 = 0.0600) from the Pandora mine. Electron-probe microanalysis provided the empirical formula (Sr0.88K0.17Ca0.10Mg0.07Al0.03Fe0.02)Σ1.20(UO2)2(V2.08O8)·5H2O for crystals from Sulfur Springs Draw, and (Sr0.50Ca0.28Ba0.22K0.05)Σ0.94(U0.99O2)2(V2.01O8)·5H2O for crystals from the Pandora mine, based on 17 O atoms per formula unit. The structure of finchite contains uranyl vanadate sheets based upon the francevillite topology. Finchite is a possible immobilization species for both uranium and the dangerous radionuclide 90Sr because of the relative insolubility of uranyl vanadate minerals in water.
Marco E. Ciriotti

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