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lanthanum oxide sulfates

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Journal Article
Journal: Elements
Published: 01 October 2012
Elements (2012) 8 (5): 355–360.
..., and from the solution thus obtained, the oxide of lanthanium was derived”; he precipitated it using potassium hydroxide ( Mosander 1843 ). Mosander had discovered that lanthanum (Greek, to lie hidden) oxide is more soluble in dilute acids than cerium oxide. A year later, Mosander realised that even his...
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Journal Article
Published: 01 October 2019
American Mineralogist (2019) 104 (10): 1469–1480.
... range of physical and chemical properties of gasparite-(La), investigate its crystal chemistry and identify some features characteristic of different genetic types of deposits. In most cases, lanthanum is present in gasparite in subordinate amounts (<15 wt% La 2 O 3 ). However, La-dominant grains...
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Journal Article
Published: 01 May 2012
American Mineralogist (2012) 97 (5-6): 791–799.
... in Δ H f ox of the other oxyacids, such as carbonates, silicates, and sulfates. The cutoff energy was set to 500 eV for all systems. A γ-centered reciprocal space grid was used for each system. The following k -point grid sizes were used: For the C-oxide, monazite, and xenotime structures, 7 × 7 × 7...
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Journal Article
Published: 01 December 2022
American Mineralogist (2022) 107 (12): 2242–2250.
.... Jones and Wyllie (1983 , 1986) and Wyllie et al. (1996) experimented on La-bearing carbonatite melts in the system CaCO 3 -Ca(OH) 2 -La(OH) 3 at 100 MPa, but lanthanum hydroxide was the only La crystalline phase found in the run products. Wyllie et al. (1996) briefly mentioned that they had...
FIGURES
Journal Article
Published: 01 August 2020
Russ. Geol. Geophys. (2020) 61 (8): 858–873.
... reaches 40–45% ( Solotchina et al., 2013 ; Solotchin et al., 2017 ). Rapid oxidation–reduction processes at the lake bottom cause reduction of sulfate ion to sulfide. As a result, hydrogen sulfide is produced, and iron sulfides are deposited. Crystalline hydrates are deposited on the shore of Lake...
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Journal Article
Journal: Geology
Published: 26 May 2023
Geology (2023) 51 (7): 698–702.
...Xudong Wang; Ting Xu; Jörn Peckmann; Germain Bayon; Zice Jia; Shanggui Gong; Jie Li; Erik Cordes; Yanan Sun; Jun Tao; Duofu Chen; Dong Feng Abstract Many chemosynthesis-based communities prospering in deep-sea environments rely on the metabolic activity of sulfide-oxidizing bacteria...
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Journal Article
Published: 01 April 2001
Clays and Clay Minerals (2001) 49 (2): 183–185.
.... The presence of cerium or lanthanum seems to promote polymerization of the Al polyoxocation. Until now however, nobody has been able to assess the structure of the newly formed pillaring molecules. Although the inter-layer spacing is about twice that of the normal Al-pillared clay, chemical analyses indicate...
Journal Article
Published: 01 March 2024
American Mineralogist (2024) 109 (3): 471–481.
... for the understanding of underlying mechanisms. Control of such transformations is crucial because many materials undergo solid-solid transitions between various forms as a function of temperature or pressure. The copper sulfate-oxides and molybdate-oxides are of essential interest from geological, physical...
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Journal Article
Published: 01 October 2013
Mineralogical Magazine (2013) 77 (7): 3019–3026.
...-(Ce) requires a source of oxalate, a source of REE s, and the presence of water as the fluid medium allowing REE and oxalate ions to form soluble REE -oxalate complexes ( Gammons and Wood, 2000 ). A source of oxalate is provided by incomplete oxidation of organic material, such as decaying plant...
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Journal Article
Published: 01 September 2016
American Mineralogist (2016) 101 (9): 2051–2056.
.... The enthalpies of formation at 298 K from the constituent oxides ( Δ H f , ox ∘ ) and from the elements ( Δ H f , el ∘ ) have been determined using high-temperature oxide melt solution calorimetry in molten 3Na 2 O·4MoO 3 at 973 K. Enthalpy of formation from oxides Δ H f , ox ∘ becomes more exothermic...
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Journal Article
Published: 01 December 2019
Russ. Geol. Geophys. (2019) 60 (12): 1407–1424.
... 0.29 0.8 0.14 0.43 0.61 0.64 Hf 7.2 3.8 n.d. n.d. n.d. n.d. Ta 1.24 0.9 n.d. n.d. n.d. n.d. Pb 112 63 n.d. n.d. n.d. n.d. Th 47 239 n.d. n.d. n.d. n.d. U 15.9 9.8 n.d. n.d. n.d. n.d. Note. The content of the oxides is given in weight...
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Journal Article
Published: 01 May 2001
Geochemistry: Exploration, Environment, Analysis (2001) 1 (2): 101–108.
... . HARTIKAINEN , H. & YLI-HALLA , M. 1986 . Oxidation-induced leaching of sulphate and cations from acid sulphate soils . Water, Air and Soil Pollution 27 , 1 – 13 . HASKIN , L. A. , HASKIN , M. A , FREY , F. A. & WILDERMAN , T. R. 1968 . Relative and absolute...
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Journal Article
Published: 01 August 2017
American Mineralogist (2017) 102 (8): 1646–1656.
...-hydrothermal systems. Manuscript handled by Fabrizio Nestola 4 12 2016 16 4 2017 Copyright © 2017 by the Mineralogical Society of America 2017 Mineralogical Society of America Apatite S incorporation S oxidation state energetics geometry column anion lanthanum oxybarometry...
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Journal Article
Journal: Clay Minerals
Published: 01 September 2018
Clay Minerals (2018) 53 (3): 505–514.
...Kaihua Chen; Jiannan Pei; Shaohua Yin; Shiwei Li; Jinhui Peng; Libo Zhang ABSTRACT The present study investigates the use of magnesium sulfate (MgSO 4 ) instead of (NH 4 ) 2 SO 4 as a lixiviant in the recovery of rare earth elements ( REE s) from clays. Experiments were carried out to investigate...
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Journal Article
Published: 01 August 2012
Mineralogical Magazine (2012) 76 (4): 913–923.
...) 0.3699(14) 0.5755(4)) and shares four identical bonds with Se (4 a : ½ ½ ½) at 1.644(5) Å. The Ca (4 b : 0, 0, ½) is eight-coordinated via O at 4 × 2.440(6) Å and 4 × 2.504(5) Å. This is further evidence of the dissimilarity of sulfate and selenate at high pressure and temperature conditions...
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Journal Article
Journal: Clay Minerals
Published: 06 August 2020
Clay Minerals (2020) 55 (2): 184–193.
... ) Hydrated cylindrical halloysite 1.30 0.015 86 Unpublished – this study, see Supplementary Materials Hydrated prismatic halloysite 0.35 0.006 58 Unpublished – this study, see Supplementary Materials Halloysite +  lanthanum oxycarbonate 130.4 2.031 64.2 Wei et al. ( 2019...
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Journal Article
Published: 03 July 2023
American Mineralogist (2023) 108 (7): 1399–1408.
... No. 2021-011) was discovered in exhalations of the active Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. The associated minerals are diopside, hematite, cuprospinel, fluorophlogopite, anhydrite, johillerite, tilasite, and aphthitalite-group sulfates. Ryabchikovite forms thin (up to 25 μm...
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Journal Article
Published: 01 December 2007
The Canadian Mineralogist (2007) 45 (6): 1389–1396.
...; the REE sum of 2.04 is due solely to rounding errors. The find represents the first occurrence of this rare mineral in New Zealand. The mineral formed under comparatively oxidizing conditions. The REE are probably scavenged by warm waters circulating through underlying greywackes of the Manaia Hill Group...
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Journal Article
Journal: AAPG Bulletin
Published: 01 April 2016
AAPG Bulletin (2016) 100 (4): 597–621.
... reservoirs of the Lower Saxony Basin in northwest Germany. These reservoirs are locally characterized by high amounts of carbon dioxide (CO 2 ) and variable amounts of hydrogen sulfide (H 2 S), which are derived from thermochemical sulfate reduction (TSR) and inorganic sources. To study the contribution...
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Journal Article
Published: 01 April 2005
The Canadian Mineralogist (2005) 43 (2): 813–827.
...Stéphane Gaboreau; Daniel Beaufort; Philippe Vieillard; Patricia Patrier; Patrice Bruneton Abstract Aluminum phosphate–sulfate (APS) minerals occur as disseminated crystals in a wide range of geological environments near the Earth’s surface, including weathering, sedimentary, diagenetic...
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