hydronium ion

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Journal Article
Published: 01 September 1986
The Canadian Mineralogist (1986) 24 (3): 435–447.
Journal Article
Published: 01 October 1965
American Mineralogist (1965) 50 (10): 1595–1607.
...Gerald P. Brophy; Michael F. Sheridan Abstract A synthetic and natural solid solution series exists among jarosites by virtue of a K + -Na + -H 3 O f substitution. The presence of hydronium ion can best be detected from a study of thermal and x-ray data. There is a pronounced weight loss from 240...
The  16 O&#x2F; 18 O oxygen isotopic ratio in the <b>hydronium</b> <b>ion</b> in the coma of c...
Published: 01 January 2008
Figure 7. The 16 O/ 18 O oxygen isotopic ratio in the hydronium ion in the coma of comet 1P/Halley measured by the ion mass spectrometer IMS (data from Balsiger et al. 1995 ). The 16 O/ 18 O ratio of Standard Mean Ocean Water (SMOW) is 498.7. Modified from Balsiger et al. (1995) .
Journal Article
Published: 01 April 2013
The Canadian Mineralogist (2013) 51 (2): 297–312.
... of a [Na 2 (H 2 O) 10 ] dimer decorated with four hydronium ions. As in wernerbaurite, an extensive network of hydrogen bonding links the interstitial unit to the structural unit in schindlerite. Schindlerite is named in honor of Dr. Michael Schindler, Associate Professor for Environmental Mineralogy...
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Journal Article
Published: 01 July 2010
American Mineralogist (2010) 95 (7): 1109–1112.
... through the oxygen, the cation is found to occupy a tilted orientation leading to a greater degree of disorder. Dynamical simulations indicate that the reorientation of the hydronium ions is rapid and exhibits no correlation between the cation sites. The higher level of disorder in the hydrogen positions...
Journal Article
Published: 01 April 2012
Clays and Clay Minerals (2012) 60 (2): 186–199.
.... In all Questa samples, the low-temperature water derived from pore-water and interlayer sites, as well as the intermediate-temperature water derived from interlayer cation sites occupied by hydronium and structural hydroxyl ions, show tritium values at or near modern levels for precipitation. Pore water...
FIGURES | View All (6)
Journal Article
Published: 01 October 1991
American Mineralogist (1991) 76 (9-10): 1563–1579.
... crystal-chemical significance, an analysis of the components of variance in measured H 2 O(+) content proceeds by statistically testing three models for incorporation of H 2 O in interlayer sites: (l) as neutral H 2 O molecules, (2) as hydronium ions, H 3 O + , and (3) as a combination of H 2 O and H 3 O...
Journal Article
Published: 01 April 2007
American Mineralogist (2007) 92 (4): 587–597.
... ) was observed and assigned to Al with one Al vacancy in the first cation sphere. Three different proton environments, Al 2 -OH, Al-OH 2 , and H 3 O + are detected by 1 H and 2 H MAS NMR. The hydronium ion (H 3 O + ) is only observed in hydronium alunite, and is associated with the stoichiometric regions...
FIGURES | View All (11)
Journal Article
Journal: AAPG Bulletin
Published: 01 April 1964
AAPG Bulletin (1964) 48 (4): 519.
... endothermic reactions at approximately 350°C., 400°C., and 800°C. The 350°C. reaction is broad and represents a loss of hydronium ion. Similar results have been noted for natural, low-temperature jarosites. Synthesis of alunites and jarosites with variable K-Na ratios shows a marked preference for K...
Journal Article
Published: 01 October 1957
American Mineralogist (1957) 42 (9-10): 594–618.
... the sheets together are the calcium and water molecules. Seven oxygens surround the uranium, two of which form the linear uranyl ion with the U—O distance 1.91 Å. The other five oxygens, all in SiO 4 tetrahedra, are in a plane normal to the axis of the uranyl ion. Five water or hydronium ions and three...
Journal Article
Published: 01 February 1984
American Mineralogist (1984) 69 (1-2): 41–56.
... not respond to hydration or glycolation, and X-ray diffraction patterns show none of the peaks of talc, montmorillonites, vermiculite, or 7- or 14-Å chlorites. This suggests that some normally octahedrally coordinated cations and water or hydronium ions are located in the interlayer X sites. Phenocryst micas...
Journal Article
Published: 01 February 1963
American Mineralogist (1963) 48 (1-2): 138–149.
..., the latter containing principally K and Ca as interlayer ions and the former Na and probably H(H 2 O), i.e. , hydronium ions. Comparison is made with the work of Brown and Norrish on hydrous micas. Two hypotheses are considered for the formation of long-spacing minerals of this type, namely (1) an unmixing...
Journal Article
Published: 01 June 2014
Mineralogical Magazine (2014) 78 (3): 535–547.
... reflections, with I obs >3σ( I ). The present structure model, which includes the position of the H atom within the hydronium ion, is discussed with regard to the vibration spectroscopy results and earlier published density-functional theory (DFT) calculations for the alunite-like structure containing H 3...
FIGURES | View All (6)
Journal Article
Published: 01 June 2010
Mineralogical Magazine (2010) 74 (3): 487–492.
..., V = 508.5(9) Å 3 and Z = 1. The structure broadly conforms to that of the general pharmacosiderite structure type, with the hydronium ion generated by partial protonation of a site corresponding to a molecule of water of crystallization and its symmetry-related equivalents. In addition...
Journal Article
Published: 01 June 1966
American Mineralogist (1966) 51 (5-6): 825–854.
... deviation). 3. All have excess H 2 O+; calculation of structural formulas by attributing excess H 2 O+ to interlayer hydronium ion does not appear satisfactory; calculation in the normal manner results in structural charges considerably less than those of true micas. 4. The C.E.C. is proportional to the per...
Journal Article
Published: 01 April 1964
American Mineralogist (1964) 49 (3-4): 363–376.
... volatile released when the apatite is heated. This water probably is present in the crystals as hydronium ions and (H 4 O 4 ) 4- substituting for Ca 2+ and (PO 4 ) 3- respectively. 9 8 1963 30 9 1963 Copyright © 1964 by the Mineralogical Society of America 1964 Mineralogical Society...
Journal Article
Published: 01 December 1962
American Mineralogist (1962) 47 (11-12): 1356–1362.
...) and with interlayer hydronium ions. 18 06 1962 Copyright © 1962 by the Mineralogical Society of America 1962 Mineralogical Society of America ...
Journal Article
Published: 01 August 2016
Clays and Clay Minerals (2016) 64 (4): 413–424.
... of the stability of H 3 O + ions in the interlayer space. The present work was based on the hypothesis of the existence of the hydronium cation in the interlayer space of illite and the objective was to study the stability of and effect of H 3 O + as an interlayer cation (IC) on the illite structure...
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Journal Article
Published: 01 August 2007
American Mineralogist (2007) 92 (8-9): 1464–1473.
... is maintained by protonation of the hydroxyl groups in the structure, creating water molecules ( Ripmeester et al. 1986 ). Ripmeester et al. (1986) confirmed the presence of hydronium ions in the alunite structure using NMR (nuclear magnetic resonance) and Wills and Harrison (1996) proposed a model...
FIGURES | View All (11)
Journal Article
Published: 01 May 2008
American Mineralogist (2008) 93 (5-6): 853–862.
... in the A site. They found that the hydronium ion (H 3 O + ) was observed in hydronium alunite but was not detected in the spectra of alunite and natroalunite that had less than 100% A site occupancy of K or Na. They suggest that an Al vacancy at the B site is compensated by the addition of 4 H + . H 3 O...
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