... vibrational spectra it is impossible to decide whether SO 4 2– or HSO 4 – ions are present. Sulfite ions may be present in high-sulfur scapolites. Carbon is present as the carbonate ion, probably strongly bound in a discrete structural site. A method of determining the CO 2 content of any scapolite has been...

... features: permanent presence of sulfite ion, which often dominates over other surface sulfur anions; weakly determined size dependence of the content of uniformly distributed Au owing to the presence of an internal concentrator of gold—dispersed carbonaceous material—in pyrite from ore zones; cell...

... that an incursion of slightly oxidizing groundwater (which also carries uranium in solution) into the sandstone aquifer would cause the oxidation of previously existing sulfide minerals to unstable sulfite (rather than sulfate) ions, and that these sulfite ions disproportionate into bisulfide ions and chemically...

...); here there is no free O 2 and the principal bacterial flora utilize CO 4 — ions of the connate sea water, leading to sulfite and sulfide production, and commonly the formation of pyrite nodules. In barred basins the Eh = 0 boundary is above the sediment-water interface and the upper layer is eliminated...

... 7a and k 7bc were initially determined using Q 4 of 4.9. Using the values of k 7a , k 7bc , Q 2 , and Q 4 given above and 0.75 for the activity coefficient of hydrogen ion [H + ] at pH 8.9 and [SO 3 2− ] at 0.3 M, we estimated the half-life of sulfite–water oxygen exchange to be 75...

...) megacrysts. We present X-ray photoelectron spectroscopy data demonstrating that sulfur is accommodated predominantly in monazite-(Ce) as sulfate, via a clino-anhydrite-type coupled substitution mechanism. Minor sulfide and sulfite peaks in the X-ray photoelectron spectra, however, also indicate that more...

..., Monatshefte , 1983 , 60 – 68 . Eklund L. Hofer T.S. Pribil A.B. Rode B.M. Persson I. ( 2012 ) On the structure and dynamics of the hydrated sulfite ion in aqueous solution an ab initio QMCF MD simulation and large angle X-ray scattering study . Journal of the Chemical Society...

... ; Table 5 ). Each sulfite ion is bonded to three Fe atoms, giving a three-dimensional net of Fe–O–S interactions. The H-bonding scheme in albertiniite is O1···H2–O6–H1···O4, O3···H4–O5–H3···O2 and O6···H6–O4-H5···O1 ( Table 5 ). All the H-bonds show O–H···O angles > 160°and H···O distances ≤ 2...

... sulfur species that appear at dissolving galena surfaces. For instance, the pyramidal-shaped sulfite ion has only two Raman active modes. These appear as weak to moderate signals in the Raman spectrum at 933 and 964 cm −1 (see for instance the inset in Fig. 2a ). The sulfate molecule is pyramidal shaped...

...) with respectively ΔpH=5.06 and ΔpH=1.99 at 30 days whereas pH remains buffered in [NaHCO 3 − ] =1.12.10 −2 and 0.1 mol/L solutions. Siderite appears to be the first solid precipitating, transforming into gœthite, oxyhydroxy ferric sulfate incorporating sulfite and thiosulfate, and then lepidocrocite. Sulfur...

... to sulfate-ester compounds. In the PAPS pathway, utilized by some cyanobacteria, but mostly by anoxygenic microorganisms, APS formation leads, through sulfite, to the production of reduced organic sulfur compounds. The fractionations associated with assimilatory sulfate reduction are small, with Δ...

... all column ions by sulfide ions), S 2– is positioned in the anion column at z = 0.5 (halfway between the mirror planes at z = ¼ and z = ¾) in the energy-optimized structure. The calculated energies for partial incorporation of S 2– demonstrate that in an energy-optimized structure, S 2– is displaced...

... that exsolved from oxidized and reduced silicate melts exists as sulfite (S 4+ ; SO 2 ), sulfide (S 2− ; H 2 S; Burgisser et al. 2015 ), and a trisulfur ion ( S 3 − ; Pokrovski and Dubrovinsky 2011 ; Pokrovski and Dubessy 2015 ). The mineral apatite, commonly Ca 5 (PO 4 ) 3 (F,Cl,OH...

... the following reactions: SO 2 rapidly hydrates to form sulfurous acid, which in turn dissociates to yield dissolved bisulfite (reaction 1) and sulfite ions. SO 2 (+IV oxidation state) may also disproportionate in water to yield H 2 SO 4 (+VI) and either S e (0 oxidation state, reaction 2) or H 2 S...

... grains 20-30 m) lose the blue chromophore 560 radical ion S3- during annealing, and only oxidised forms of sulfur - sulfate and sulfite, which are 561 not chromophores, remain in them. In larger particles, the chromophore S3- is retained, the 562 intensity of blue colouring increases, and a violet tinge...

....,  Yao and Millero, 1993 , 1996 ; Pyzik and Sommer, 1981 ). Elemental sulfur is also an important product in marine sediments where it occurs at concentrations about three orders of magnitude higher than the oxyanions, thiosulfate or sulfite ( e.g ., Zopfi et al ., 2004 ). However, the pool size...

..., a precursor to gypsum, hannebachite, may be formed ( Rai et al., 1991 ). That process begins with partial oxidation of pyrite to produce goethite and sulfite with less abundant sulfate ions ( Goldhaber, 1983 ): The powdered limestone then reacts with these products at pHs of between 1.9 and 6.35 (the pKs...

...Owen P. Missen; Stuart J. Mills; Michael S. Rumsey; John Spratt; Jens Najorka; Anthony R. Kampf; Brent Thorne Abstract Tomiolloite (IMA2021-019) is a new aluminum tellurite sulfite-sulfate mineral discovered at the Bambolla mine, Moctezuma, Sonora, Mexico, a well-known tellurium (Te) mineral...

... Acrodisc filter. All samples for laboratory analysis were kept on ice for transport and in a 4°C refrigerator in the laboratory until analysis was carried out within one week. Major cations (K + , Na + , Mg 2+ , Ca 2+ ) were analyzed on a Dionex series 500 Ion Chromatograph using a 4-mm Dionex IonPac CS12A...