autunite group

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Méta-autunite — Wikipédia

La méta-autunite[2] est un minéral de la classe des phosphates. Paul Gaubert l''a nommé en 1904 par rapport à sa formule chimique ressemblant à celle de l''autunite, mais avec une teneur en eau plus faible[3]. C''est un minéral radioactif. L''échantillon type de cette espèce provient de la mine Daybreak, dans l''État de Washington (États ...

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Autunit – Wikipedia

Autunit (auch Kalkuranglimmer) ist ein häufig vorkommendes Mineral aus der Mineralklasse der „Phosphate, Arsenate und Vanadate", das zur Gruppe der Uranglimmer gehört. Es kristallisiert im orthorhombischen Kristallsystem mit der chemischen Zusammensetzung Ca[(UO 2)(PO 4)] 2 ·11 H 2 O und ist daher chemisch betrachtet ein Calcium-Uranyl-Phosphat.

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[PDF] A NON-CENTROSYMMETRIC FLUORINE-BEARING …

The crystal structure of uranospathite, ideal formula Al1–x x[(UO2)(PO4)]2(H2O)20+3xF1–3x, 0 < x < 0.33, orthorhombic, space group Pnn2, a 30.020(4), b 7.0084(9), c 7.0492(9) Å, V 1483.1(3) Å3, Z = 2, Dcalc 2.54 g/mL, and that of synthetic Al0.67 0.33 [(UO2)(PO4)]2(H2O)15.5, AlUP, triclinic, space group P1̄, a 7.0020(6), b 13.7120(11), c 14.0243(11) Å, 78.418(2), 89.676(2), 81.863(2 ...

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Meta-autunite Group: Mineral information, data and …

A group of layer-structured uranyl phosphates and arsenates. Slightly dehydrated versions of the minerals in the Autunite Group: A(UO2)2(TO4)2·8-16H2O.

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High-temperature calorimetric measurements of …

Abstract Five uranyl arsenates of the meta-autunite group with mono (Li, K, Cs) and divalent (Sr and Cu) cations were synthesized at room temperature and characterized. Their thermodynamic properties were measured using high-temperature oxide melt calorimetry in a molten 3Na2O·4MoO3 solvent at 976 K. Measured enthalpies of drop solution of each compound were used to calculate their respective ...

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Autunite-Group Minerals and Their Paragenesis from the …

Autunite-Group Minerals and Their Paragenesis from the Sheared Granite of Gabal El Sela, South Eastern Desert, Egypt

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Thermochemical studies of X(NpO2)(PO4)(H2O)3 (X = …

 · Studies have been conducted to investigate autunite/meta-autunite group mineral structures, chemistries, and thermodynamic stabilities [6,,, ].The thermodynamics of uranyl phosphates have been studied by solution calorimetry [], and more recently, high temperature oxide melt drop solution calorimetry by this research group [14,15].

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(PDF) Cation substitution in uranyl phosphates of the …

general chemical form ula of the autunite group (A(UO 2) 2 (XO 4) 2 · 10-12H 2 O with A = Cu, Ca, Ba, or Mg and X = P or As) in order to understand the cationic substitutions mentioned abov e. 2 ...

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Autunite Group Near Torboy, Washington | The Diggings™

Autunite Group Torboy, Washington 48.6206 N 118.4692 W Overview Uranium Location 1 Aliquots Physiography 1 Records Mine Overview The Autunite Group is near Torboy, Washington and is part of the Colville National Forest. The Northern Rocky Mountains ...

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META-AUTUNITE (Hydrated Calcium Uranyl Phosphate)

The Mineral META-AUTUNITE. Chemistry: Ca (UO 2) 2 (PO 4) 2 - 2-6H 2 O, Hydrated Calcium Uranyl Phosphate. Class: Phosphates. Group: Meta-autunite. Uses: A minor ore of uranium and as mineral specimens. Specimens. Meta-autunite is a dehydration product of its close cousin, autunite, hence the name. When the mineral autunite loses water and ...

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Autunite Mineral Data

Autunite Crystallography Axial Ratios: a:c = 1:2.95848 Cell Dimensions: a = 7.009, c = 20.736, Z = 2; V = 1,018.68 Den(Calc)= 3.22 Crystal System: Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: I 4/mmm X Ray

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Near-infrared spectroscopy to uranyl arsenates of the …

 · Among the many uranium minerals are a group of minerals, which are very common worldwide known as the autunite group of minerals. The autunite group of minerals are uranyl arsenates and phosphates with symmetries ranging from tetragonal to triclinic.

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Autunite (torbernite) group, AUTUNITE (TORBERNITE) …

Frye K. (1981) Autunite (torbernite) group, meta-autunite (metatorbernite) group. In: Mineralogy. Encyclopedia of Earth Science. Springer, Boston, MA. https://doi /10.1007/0-387-30720-6_14.RIS

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Meta-autunite R060476

Suzuki Y, Sato T, Isobe H, Kogure T, Murakami T (2005) Dehydration processes in the meta-autunite group minerals meta-autunite, metasaléeite, and metatorbernite, American Mineralogist, 90, 1308-1314 Plášil J, Sejkora J, Cejka J, Škoda R, Goliáš V (2009) Supergene mineralization of the Medvedín uranium deposit, Krkonoše Mountains, Czech Republic, Journal of Geosciences, 54, 15-56

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Sodium meta-autunite Na2(UO2(PO4 2 (6 8)H2O

Mineral Group: Autunite group. Occurrence: In the oxidized zone of a uranium deposit in a granodiorite massif. Association: Schoepite, gypsum, kaolinite, "limonite". Distribution: Found in the Kuruk uranium deposit, 15 km northeast of Khodzhent, Samgar

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Chernikovite (H3O)2(UO2(PO4 2 6H2O

Mineral Group: Meta-autunite group. Occurrence: In fissures in quartz syenite and around fossil wood (Karakat deposit, Tajikistan); along fractures in tourmaline-bearing granites and granite pegmatites (Perus district, Brazil). Association: Autunite, meta-autunite

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Pin on Autunite (Groupe)

Autunite, Daybreak Mine, near Mount Spokane, Spokane County, Washington, USA. Flat plate of foliated platy yellow-green autunite crystals. Collected ca. 1985. Overall Size: 5

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Autunite

 · C.,* High-temperature Calorimetric Measurements of Thermodynamic Properties of Uranyl Arsenates of the Meta-autunite Group. Chemical Geology 2018, 493, 353-358. Zhang, L.; Shelyug, A.; Navrotsky, A.,* Thermochemistry of UO 2-ThO 2 and UO 2-ZrO ...

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Mindat

Autunite Group. Autunite Group. Triple H & J Mine, Blueslide, Pend Oreille Co., Washington, USA. Tabular crystal of an autunite group mineral. It has not been analyzed to determine its hydration level; thus, it may be autunite or meta-autunite. Field of view is 5 mm. Photo by Edward Rosenzweig.

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(PDF) MONOVALENT CATIONS IN STRUCTURES OF THE …

5. The structure of monovalent meta-autunite com- pounds with space group P4/ncc, projected along [100]. Uranyl polyhedra are yellow, and the tetrahedra are green. The monovalent cations and H2O groups are disordered on the interlayer site (shown in red), with maximum occu- FIG.

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Autunite-Group Minerals and Their Paragenesis from the Sheared …

E. K. A. Zeid DOI: 10.4236/ojg.2020.106031 704 Open Journal of Geology erals (autunite group) with paragenetic sequence starting by autunite (calcic uranyl phosphate) and ends by metanatroautunite ...

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Abernathyite K2(UO2(AsO4 2 6H2O

Mineral Group: Meta-autunite group. Occurrence: A rare secondary mineral coating fractures in bleached asphaltic sandstone hosting a Colorado Plateau-type uranium deposit (Fuemrol No. 2 mine, Utah, USA). Association: Scorodite, zeunerite, heinrichite.

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Crystal structure of bassetite and saléeite: new insight into …

Abstract The crystal structures of two autunite-group minerals have been solved recently. The crystal structure of bassetite, Fe2+ [(UO2)(PO4)]2 (H2 O)10, from the type locality in Cornwall, United Kingdom (Basset Mines) was solved for the first time. Bassetite is ...

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Autunite Group

Autunite, Autunite Group, like as crystals and crust on Allanite, with bright green fluorescence. FOV: 5.2 x 3.4 mm. From San Fenancio Mine, Estancia Anchilla, Tafí del Valle Department, Province of Tucumán, Argentina. Raúl Jorge Tauber Larry´s collection.

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Autunite Group – Western Mining History

The Autunite Group is a uranium mine located in Ferry county, Washington at an elevation of 5,499 feet. About the MRDS Data: All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this ...

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Pin on Autunite (Groupe)

Autunite, PingJiang City, HuNan Province, China. Size 50x35x15 mm. When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures.

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Autunite-Group Minerals and Their Paragenesis from the …

Zeid, E. (2020) Autunite-Group Minerals and Their Paragenesis from the Sheared Granite of Gabal El Sela, South Eastern Desert, Egypt. Open Journal of Geology, 10, 703-725. doi: 10.4236/ojg.2020.106031. 1. Introduction Gabal El Sela is located south the Eastern ...

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Near-Infrared spectroscopy of uranyl arsenates of the autunite and metaautunite group

The autunite group of minerals are uranyl arsenates and phosphates with symmetries ranging from tetragonal to triclinic. The minerals have a general formula M(UO2)2(XO4)2.8-12H2O where M may be Ba, Ca, Cu, Fe 2+, Mg, Mn2+ or ½(HAl) and X is As, or P ...

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(PDF) Autunite-Group Minerals and Their Paragenesis …

PDF | On Jan 1, 2020, Ehab K. Abu Zeid published Autunite-Group Minerals and Their Paragenesis from the Sheared Granite of Gabal El Sela, South Eastern Desert, Egypt | Find, read and cite all the ...

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Autunite Ca(UO2(PO4 2 10 12H2O

Autunite Ca(UO2)2(PO4)2• 10−12H2O c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Tetragonal. Point Group: 4/m2/m2/m. As thin to moderately thick crystals, tabular on {001} and with rectangular or octagonal outline, to 2 cm; commonly in

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Meta-autunite Group

H4W-FA9 Meta-autunite Group A(UO 2) 2 (XO 4) 2 ·nH 2 O (n = 6, 7 or 8) ...

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High-temperature calorimetric measurements of …

 · Compounds of the meta-autunite group, including the uranyl arsenates under study here, can have multiple hydration states. To quantify the quantity of water in each sample, thermogravimetric analyses were performed using a Mettler Toledo TGA/DSC-1

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Thermodynamic properties of phosphate members of the …

Abstract Samples of synthetic analogs of uranyl phosphate minerals have been prepared at room temperature by slow mixing of reactants by a diffusion method. Reaction products were analyzed using powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA), inductively coupled plasma optical emission spectrophotometry (ICP-OES), and inductively coupled plasma mass spectrometry (ICP-MS ...

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