Structure Refinement and Thermal Stability Studies of the Uranyl Carbonate Mineral Andersonite, Na2Ca[(UO2)(CO3)3]·(5+x)H2O

Gurzhiy, Vladislav V.; Krzhizhanovskaya, Maria G.; Izatulina, Alina R.; Sigmon, Ginger E.; Krivovichev, Sergey V.; Burns, Peter C.

doi:10.3390/min8120586

Cited by 5 publications

(3 citation statements)

References 37 publications

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“…The results of current study allow to expand the common crystal chemical borders of the U 6+ -bearing minerals and to estimate rather rarely studied parameters such as the strength characteristics of crystal structures. By the current study, it has been documented that uranyl complexes are one of the most stable and rigid blocks in the structural architecture of natural and synthetic uranyl compounds, and they govern the thermal behavior of the whole structure, which is in agreement with the results of recent studies (Gurzhiy et al 2018(Gurzhiy et al , 2020Kornyakov et al 2019). These conclusions are valid, regardless of: 1) the dimensionality of U 6+ -bearing substructural units, 2) both the arrangement and the chemical composition of an interlayer structure.…”

Section: Discussionsupporting

confidence: 91%

Thermal behavior of uranyl selenite minerals derriksite and demesmaekerite

Gurzhiy¹,

Izatulina²,

Krzhizhanovskaya³

et al. 2020

Jour. Geosci.

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Crystal structures of two uranyl selenite minerals derriksite, Cu 4 [(UO 2)(SeO 3) 2 ](OH) 6 , and demesmaekerite, Pb 2 Cu 5 [(UO 2) 2 (SeO 3) 6 (OH) 6 ](H 2 O) 2 , which structures are based on uranyl selenite 1D structural units, were studied employing single-crystal X-ray diffraction analysis at various temperatures. The refinement of their crystal structures reveals the detailed dynamics of the interatomic interactions during the heating process, which allows describing the thermal behavior. Uranyl selenite chains and their mutual arrangement mainly provide the rigidity of the crystal structure. Thus the lowest expansion in the structure of derriksite is observed along the direction of uranyl selenite chains, while the largest expansion occurs in the direction normal to chains, with the space occupied by lone electron pairs of Se 4+ atoms and low covalent bond distribution density. The maximal expansion in the crystal structure of demesmaekerite is manifested approximately along the [100], which matches the direction of chains of less strongly bonded Cu-centered octahedra, and gaps between Cu chains occupied by the Pb cations. The crystal structure of demesmaekerite undergoes contraction in the direction of the space between the U-bearing chains with the deficiency of strong covalent bonds. Contraction of the structure can also be attributed to the orthogonalization of the oblique triclinic angles of the unit cell. It is demonstrated that the assignment of U-bearing units during structure description is reasonably justified since, regardless of their dimensionality, these substructural units are one of the most stable and rigid blocks in the structural architecture, and they govern the thermal behavior of the entire structure.

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Section: Discussionsupporting

confidence: 91%

Thermal behavior of uranyl selenite minerals derriksite and demesmaekerite

Gurzhiy¹,

Izatulina²,

Krzhizhanovskaya³

et al. 2020

Jour. Geosci.

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“…The average spectra for uranyl carbonate minerals contains contributions from andersonite (Na 2 Ca(UO 2 )(CO 3 ) 3 •6H 2 O) Gurzhiy et al, 2018;Kalashnyk et al, 2018), bayleyite (Mg 2 (UO 2 )(CO 3 ) 3 •18H 2 O) (Colmenero, 2020;Mayer and Mereiter, 1986;Škácha et al, 2014), liebigite (Ca 2 (UO 2 )(CO 3 ) 3 •11H 2 O) (Frost et al, 2005e;Mereiter, 1982a), (Colmenero et al, 2020b), rutherfordine ((UO 2 )CO 3 ) (Bonales et al, 2016a;Finch et al, 1999;, widenmannite (Colmenero et al, 2020b;Plášil et al, 2010b;Plášil et al, 2014), and zellerite (Ca(UO 2 )(CO 3 ) 2 •5H 2 O) (Coleman et al, 1966;Frost et al, 2008e). The average spectrum is characterized by low-energy modes centered at 347 and 438 cm -1 .…”

Section: Uranyl Carbonatesmentioning

confidence: 99%

CURIES: Compendium of uranium Raman and infrared experimental spectra

Spano,

Olds,

McDonnell

et al. 2023

American Mineralogist

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Identification of radioactive materials is a critical goal of resource exploration, basic actinide science, and nuclear forensics, and we provide here new insights towards rapid, nondestructive analysis of uranium-containing minerals and technogenic phases. Raman and infrared spectroscopic methods are powerful indicators of solid-phase U(VI) coordination chemistry. In addition, U(VI) minerals exhibit high chemical and structural diversity as artifacts of geochemical processes leading to ore formation. Spectral signals of axial UO 2 2+ (U-O yl ) bond lengths and the influences of additional oxyanions on these values are well documented for uranium oxide and oxysalt minerals and technogenic phases. Additional insight regarding the underlying crystallographic structure and chemical composition of uranium materials can be extracted through a survey of all available Raman spectroscopic data for these phases. To this end, we have developed the Compendium of Uranium Raman and Infrared Experimental Spectra (CURIES). CURIES was compiled via thorough review of literature and databases and for mineral species that lack measured and recorded spectra, data were obtained either from museum and academic collections or by direct syntheses. Characteristic Raman spectroscopic features for subgroups of uranyl minerals within CURIES were elucidated using multivariate statistical This is the peer-reviewed, final accepted version for American Mineralogist, published by the Mineralogical Society of America. The published version is subject to change. Cite as Authors (Year) Title. American Mineralogist, in press.

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“…To date, he is the author and co-author of 47 publications focused on the crystal chemistry and structural complexity of uranium-bearing minerals and synthetic compounds (see, e.g. Gurzhiy et al , 2016, 2018, 2019, 2020, 2021; Gurzhiy and Plášil, 2019 etc. ).…”

Section: Introductionmentioning

confidence: 99%

Gurzhiite, Al(UO₂)(SO₄)₂F⋅10H₂O, a new uranyl sulfate mineral with a chain structure from the Bykogorskoe deposit, Northern Caucasus, Russia

Kasatkin

Plášil

Чуканов

et al. 2022

MinMag

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Gurzhiite, ideally Al(UO2)(SO4)2F⋅10H2O, is a new uranyl sulfate mineral from the Bykogorskoe U deposit, Northern Caucasus, Russia. It occurs as fine-grained aggregates forming veinlets up to 50 cm long in cracks of the brecciated rock. Gurzhiite aggregates are composed of small bladed crystals up to 0.1 mm across. Associated minerals include khademite and quartz. Gurzhiite is pale yellow in crystals, lemon yellow in aggregates, transparent with a vitreous lustre and a white streak. It is brittle and has an irregular fracture. Cleavage is good on {001}. The new mineral exhibits a bright yellow–green fluorescence under both longwave and shortwave UV radiation. Mohs hardness is ~2. Dmeas = 2.52(3) g/cm3 and Dcalc = 2.605 g/cm3. The mineral is biaxial (–) with α = 1.528(3), β = 1.538(2), γ = 1.544(3) (589 nm); 2Vmeas= 80(10)° and 2Vcalc = 75.1°. The empirical formula calculated on the basis of 21(O + F) atoms per formula unit (apfu) is Al0.92Zn0.05Fe3+0.03Na0.03U0.95S2.00O9.85F0.99⋅10.16H2O. Gurzhiite is triclinic, with space group P $\bar{1}$ , a = 7.193(2), b = 11.760(2), c = 11.792(2) Å, α = 67.20(3), β = 107.76(3), γ = 89.99(3)°, V = 867.7(4) Å3 and Z = 2. The five strongest lines of the powder X-ray diffraction pattern [d, Å (I, %)(hkl)] are: 10.24(100)(001); 5.40(14)( $\bar{ 1}\bar{1}$ 1); 5.11(54)(002); 3.405(11)( $\bar{2}$ 11); and 3.065(11)( $\bar{1}\bar{1}$ 3). The crystal structure of gurzhiite is based upon uranyl sulfate chains of the same type as in bobcookite and svornostite. Between the chains are two types of Al-octahedra – Al1(H2O)6 and Al2F2(H2O)4. The entire structure stability is maintained by a complex network of H bonds. The new mineral honours Russian mineralogist and crystallographer Dr. Vladislav V. Gurzhiy in recognition for his contributions to uranium mineralogy and crystallography.

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Structure Refinement and Thermal Stability Studies of the Uranyl Carbonate Mineral Andersonite, Na2Ca[(UO2)(CO3)3]·(5+x)H2O

Cited by 5 publications

References 37 publications

Thermal behavior of uranyl selenite minerals derriksite and demesmaekerite

Thermal behavior of uranyl selenite minerals derriksite and demesmaekerite

CURIES: Compendium of uranium Raman and infrared experimental spectra

Gurzhiite, Al(UO₂)(SO₄)₂F⋅10H₂O, a new uranyl sulfate mineral with a chain structure from the Bykogorskoe deposit, Northern Caucasus, Russia

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Structure Refinement and Thermal Stability Studies of the Uranyl Carbonate Mineral Andersonite, Na2Ca[(UO2)(CO3)3]·(5+x)H2O

Cited by 5 publications

References 37 publications

Thermal behavior of uranyl selenite minerals derriksite and demesmaekerite

Thermal behavior of uranyl selenite minerals derriksite and demesmaekerite

CURIES: Compendium of uranium Raman and infrared experimental spectra

Gurzhiite, Al(UO2)(SO4)2F⋅10H2O, a new uranyl sulfate mineral with a chain structure from the Bykogorskoe deposit, Northern Caucasus, Russia

Contact Info

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Gurzhiite, Al(UO₂)(SO₄)₂F⋅10H₂O, a new uranyl sulfate mineral with a chain structure from the Bykogorskoe deposit, Northern Caucasus, Russia