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ferrous

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Journal Article
Published: 01 October 1989
Clays and Clay Minerals (1989) 37 (5): 451–458.
Journal Article
Published: 01 April 2025
American Mineralogist (2025) 110 (4): 537–546.
... III in the present study). Here, we intend to characterize another phase, amorphous ferrous arsenate (AFe II ), which is formed in partially oxidized Fe(II)-As(V) systems, and carry out a comparative study on the properties and related scorodite mineralization processes relative to those of AFe III...
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Journal Article
Published: 01 March 2023
American Mineralogist (2023) 108 (3): 439–446.
... functional theory (DFT), ferrous iron’s influence on the reciprocal solubility of MgSiO 3 and CaSiO 3 perovskite (forming a single Ca-Mg mixed perovskite phase) was calculated under pressures and temperatures of 25–125 GPa and 0–3000 K, respectively. Except at iron-rich conditions, ferrous iron...
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Journal Article
Published: 01 May 2022
American Mineralogist (2022) 107 (5): 826–841.
...Peter Koděra; Juraj Majzlan; Kilian Pollok; Stefan Kiefer; František Šimko; Eva Scholtzová; Jarmila Luptáková; Grant Cawthorn Abstract Ferrous hydroxychlorides are geochemically important but less recognized mineral species due to their extreme sensitivity to oxidation and hydration in contact...
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Journal Article
Published: 01 December 2021
Clays and Clay Minerals (2021) 69 (6): 672–687.
...Shiyun Jin; Xiaochun Li; Franklin Hobbs; Stephen Guggenheim; And Huifang Xu Abstract A new ferrous phyllosilicate, meifuite, has been discovered in the Yinachang Fe-Cu-REE (rare-earth element) deposit in China. The structural formula, calculated using averaged electron probe microanalysis (EPMA...
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Journal Article
Published: 01 December 2020
American Mineralogist (2020) 105 (12): 1866–1874.
... procedures described by van Aken and Liebscher (2002) . The first approach applies two 2 eV wide integration windows to the Fe L 3 maximum (Fe 3+ ) and the Fe L 2 maximum (Fe 2+ ) of the sample. By dividing the ferrous iron content at L 2 by the ferric iron content at L 3 the Fe 3+ /ΣFe content...
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Journal Article
Published: 01 May 2019
Jour. Geol. Soc. India (2019) 93 (5): 624.
... in exploration and exploitation of ferrous group minerals in the state. The five day workshop cum training on “Geology and Exploration of the Ferrous Group of Minerals in Precambrian Milieu of Odisha”, sponsored by NMDC was conducted during 6 th to 10 th March, 2019 with trainees from NMDC, Tata Steel, Rungta...
Journal Article
Published: 01 April 2016
American Mineralogist (2016) 101 (4): 819–840.
... exhibit volcanism that is uni-modal with T p , since mantle plumes would have a monopoly on the genesis of volcanism. But new studies of magmatic ferric-ferrous ratios ( X liq Fe2O3 / X liq FeO ) ( Cottrell and Kelley 2011 ) and the olivine-liquid Fe-Mg exchange coefficient, K D (Fe-Mg) Ol-liq (or K D...
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Journal Article
Journal: Geosphere
Published: 01 June 2015
Geosphere (2015) 11 (3): 943–957.
... the released ferrous iron and the methane downward. Carbonates precipitated when the descending, reducing water degassed along fractures. The distribution of a broad array of iron-rich features made recognition of the extent of the ancient flow systems possible. Although siderite is not preserved, dense...
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Series: Society of Economic Geologists Guidebook Series
Published: 01 January 2014
EISBN: 978-1-629494-84-5
Series: Society of Economic Geologists Guidebook Series
Published: 01 January 2014
DOI: 10.5382/GB.47
EISBN: 978-1-629494-84-5
Journal Article
Published: 01 April 2012
American Mineralogist (2012) 97 (4): 592–597.
.... Blaha P. Cococcioni M. Wentzcovitch R.M. ( 2011 ) Spin-state crossover and hyperfine interactions of ferric iron in MgSiO 3 perovskite . Physical Review Letters , 106 , 118501 . Huggins F.E. ( 1975 ) The 3 d levels of ferrous ions in silicate garnets . American...
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Journal Article
Published: 01 January 2012
American Mineralogist (2012) 97 (1): 184–196.
...-free fraction because the appropriate parameters are not known. * E-mail: [email protected] Manuscript handled by Warren Huff 28 6 2011 04 10 2011 © 2012 Mineralogical Society of America 2012 Antigorite Mössbauer spectroscopy microprobe ferrous/ferric ratios...
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Journal Article
Published: 01 April 2010
American Mineralogist (2010) 95 (4): 545–555.
... , depending on temperature. It was also demonstrated that the temperature dependence of the ferric/ferrous ratio [log(Fe 3+ /Fe 2+ ) vs. 1/T] is essentially similar for basic and silicic melts. * E-mail: [email protected] 25 10 2009 12 02 2009 © 2010 American Mineralogist 2010...
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Journal Article
Published: 01 June 2009
The Canadian Mineralogist (2009) 47 (3): 615–623.
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Journal Article
Journal: The Leading Edge
Published: 01 January 2006
The Leading Edge (2006) 25 (1): 54–56.
... immunity to the effects of diurnal variation, make it an ideal data form when searching for ferrous objects such as pipelines, unexploded ordnance (UXO), mines, or archaeological remains. Corresponding author: [email protected] Copyright © 2006 Society of Exploration Geophysicists 2006...
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Journal Article
Published: 01 February 2005
American Mineralogist (2005) 90 (2-3): 510–515.
... (~10 nm), cation-excess (CE) magnetite with an Fe 2+ /Fe TOT ratio of 0.5–0.6 was the sole biogenic product after one day of incubation. The CE magnetite was unstable and partially transformed to micrometer-sized ferrous hydroxy carbonate [FHC; Fe 2 (OH) 2 CO 3(s) ], a rosasite-type mineral, with time...
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Journal Article
Published: 01 November 2003
American Mineralogist (2003) 88 (11-12): 1983–1988.
... composition (Na 0.60 K 0.04 Ca 0.47 )(Mg 2.05 Fe 2+ 3.95 )(Si 6.45 Al 1.55 )O 20 (OH) 4 . The XRD data of the Killari sample with d (001) = 1.70 nm and b 0 = 0.9275(2) nm conform to that of ferrous saponite. The FTIR spectra show vibrational bands typical of trioctahedral smectites. Differential thermal...
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Journal Article
Published: 01 April 2003
American Mineralogist (2003) 88 (4): 489–492.
... 571 578 552 565 566 586 (35) A 4 (10 6 cm −2 ) ‡ 0.291 0.274 0.217 0.206 0.189 0.150 0.113 0.082 0.037 0.015 A SUM (10 6 cm −2 ) ‡ 3.155 3.218 2.623 2.302 2.092 1.510 1.404 0.834 0.393 0.151 The optical absorption spectra of ferrous and ferric...
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Journal Article
Published: 01 July 2001
European Journal of Mineralogy (2001) 13 (4): 705–714.
... on their negatively charged surfaces, where positive ferrous ions can adsorb and may be oxidized ( Fortin et al. , 1997 ). In this process, the oxygen atoms of the organic molecules present on the bacterial surfaces are thought to provide the nucleation sites for the octahedral units of the crystals ( Archibald...
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