Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Finchite, Sr(UO2)2(V2O8)·5H2O, a new uranyl sorovanadate with the francevillite anion topology

Journal Article · · American Mineralogist
DOI:https://doi.org/10.2138/am-2022-8365· OSTI ID:1928962
 [1];  [2];  [3];  [3];  [4];  [5];  [6]
  1. Univ. of Notre Dame, IN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Univ. of Notre Dame, IN (United States); Carnegie Museum of Natural History, Pittsburgh, PA (United States)
  3. US Geological Survey, Denver, CO (United States)
  4. Natural History Museum of Los Angeles County, Los Angeles, CA (United States)
  5. Univ. of Notre Dame, IN (United States)
  6. Salt Lake City, UT (United States)
+ Show Author Affiliations

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. In this work, 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.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725; FG02-07ER15880
OSTI ID:
1928962
Journal Information:
American Mineralogist, Journal Name: American Mineralogist Journal Issue: 2 Vol. 108; ISSN 0003-004X
Publisher:
Mineralogical Society of AmericaCopyright Statement
Country of Publication:
United States
Language:
English

References (14)

Raman and infrared spectra of carbonates of calcite structure journal January 2006
Correlation of O-H stretching frequencies and O-H…O hydrogen bond lengths in minerals journal August 1999
Mineralogy and geochemistry of vanadium in the Colorado Plateau journal December 1961
Systematics in the vibrational spectra of uranyl complexes journal February 1958
Use of mineral/solution equilibrium calculations to assess the potential for carnotite precipitation from groundwater in the Texas Panhandle, USA journal October 2016
Newly recognized hosts for uranium in the Hanford Site vadose zone journal March 2009
Calcrete uranium deposits in the Southern High Plains, USA journal June 2019
Reactive Transport of U and V from Abandoned Uranium Mine Wastes journal October 2017
Identifying the Sources of Subsurface Contamination at the Hanford Site in Washington using High-Precision Uranium Isotopic Measurements journal June 2004
Aqueous Uranium(VI) Concentrations Controlled by Calcium Uranyl Vanadate Precipitates journal July 2012
Thermodynamic investigation of uranyl vanadate minerals: Implications for structural stability journal June 2017
Oxidation-hydration weathering of uraninite: the current state-of-knowledge journal April 2014
Crystal Chemistry of Carnotite in Abandoned Mine Wastes journal October 2020
Pandoraite-ba and Pandoraite-ca, Ba(V4+5V5+2)O16·3H2O and Ca(V4+5V5+2)O16·3H2O, Two New Vanadium Oxide Bronze Minerals in Solid Solution from the Pandora Mine, La Sal Mining District, San Juan County, Colorado, Usa journal March 2019

Similar Records

[La(UO{sub 2})V{sub 2}O{sub 7}][(UO{sub 2})(VO{sub 4})] the first lanthanum uranyl-vanadate with structure built from two types of sheets based upon the uranophane anion-topology
Journal Article · Sat Jan 14 23:00:00 EST 2012 · Journal of Solid State Chemistry · OSTI ID:21612869
Framework Polymorphism and Modular Crystal Structures of Uranyl Vanadates of Divalent Cations: Synthesis and Characterization of M(UO2)(V2O7) (M = Ca, Sr) and Sr3(UO2)(V2O7)2
Journal Article · Thu Jul 18 00:00:00 EDT 2019 · Zeitschrift fuer Anorganische und Allgemeine Chemie · OSTI ID:1544425
Molten salt flux synthesis and crystal structure of a new open-framework uranyl phosphate Cs{sub 3}(UO{sub 2}){sub 2}(PO{sub 4})O{sub 2}: Spectroscopic characterization and cationic mobility studies
Journal Article · Mon Apr 15 00:00:00 EDT 2013 · Journal of Solid State Chemistry · OSTI ID:22304526

Related Subjects

58 GEOSCIENCES
carnotite
curienite
finchite
francevillite
new minerals
tyuyamunite
uranyl vanadates