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Licensed Unlicensed Requires Authentication Published by De Gruyter December 31, 2020

Effects of pH and Ca exchange on the structure and redox state of synthetic Na-birnessite

  • Chiara Elmi ORCID logo EMAIL logo , Jeffrey E. Post , Peter J. Heaney and Eugene S. Ilton
From the journal American Mineralogist

Abstract

Birnessite-like minerals are among the most common Mn oxides in surficial soils and sediments, and they mediate important environmental processes (e.g., biogeochemical cycles, heavy metal confinement) and have novel technological applications (e.g., water oxidation catalysis). Ca is the dominant interlayer cation in both biotic and abiotic birnessites, especially when they form in association with carbonates. The current study investigated the structures of a series of synthetic Ca-birnessite analogs prepared by cation-exchange with synthetic Na-birnessite at pH values from 2 to 7.5. The resulting Ca-exchanged birnessite phases were characterized using powder X‑ray diffraction and Rietveld refinement, Fourier transform infrared spectroscopy, Raman spectroscopy, X‑ray photoelectron spectroscopy, and scanning and transmission electron microscopy. All samples synthesized at pH values greater than 3 exhibited a similar triclinic structure with nearly identical unit-cell parameters. The samples exchanged at pH 2 and 3 yielded hexagonal structures, or mixtures of hexagonal and triclinic phases. Rietveld structure refinement and X‑ray photoelectron spectroscopy showed that exchange of Na by Ca triggered reduction of some Mn3+, generating interlayer Mn2+ and vacancies in the octahedral layers. The triclinic and hexagonal Ca-birnessite structures described in this study were distinct from Na- and H-birnessite, respectively. Therefore, modeling X‑ray absorption spectra of natural Ca-rich birnessites through mixing of Na- and H-birnessite end-members will not yield an accurate representation of the true structure.


* Current address: Department of Geology and Environmental Sciences, James Madison University, Harrisonburg, Virginia 22807, U.S.A.


Funding statement: We also acknowledge NSF EAR-1552211 and the Miller Faculty Fellowship (College of Earth and Mineral Sciences, PSU). This research used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. ESI was supported by U. S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences (BES), Chemical Sciences, Geosciences, and Biosciences Division through its Geosciences program at Pacific Northwest National Laboratory (PNNL). PNNL is a multiprogram national laboratory operated by Battelle Memorial Institute under Contract No. DE-AC05-76RL01830 for the U.S. DOE. A portion of the research was performed using EMSL (grid.436923.9), a DOE Office of Science User Facility sponsored by the Office of Biological and Environmental Research.

Acknowledgments

This research was carried out at National Museum of Natural History, Department of Mineral Sciences, Smithsonian Institution. Scott D. Whittaker is kindly acknowledged for his technical support during the use of FEI Apreo scanning electron microscope at National Museum of Natural History, Smithsonian Institution. Si Athena Chen collected synchrotron X‑ray diffraction data at Beamline 13-BM_C at the Advanced Photon Source, Argonne National Laboratory. Ke Wang assisted with transmission electron microscopy in the Materials Characterization Laboratory, Penn State University. Four anonymous reviewers are kindly acknowledged for their thoughtful comments and suggestions that significantly improved the manuscript.

References cited

Andreiadis, E.S., Chavarot-Kerlidou, M., Fontecave, M., and Artero, V. (2011) Artificial photosynthesis: From molecular catalysts for light-driven water splitting to photoelectrochemical cells. Photochemistry and Photobiology, 87(5), 946–964.10.1111/j.1751-1097.2011.00966.xSearch in Google Scholar PubMed

Bargar, J.R., Fuller, C.C., Marcus, M.A., Brearley, A.J., Perez De la Rosa, M., Webb, S.M., and Caldwell, W.A. (2009) Structural characterization of terrestrial microbial Mn oxides from Pinal Creek, AZ. Geochimica et Cosmochimica Acta, 73, 889–910.10.1016/j.gca.2008.10.036Search in Google Scholar

Boumaiza, H., Renard, A., Robinson, M.R., Kervern, G., Vidal, L., Ruby, C., Bergaoui, L., and Coustel, R. (2019) A multi-technique approach for studying Na triclinic and hexagonal birnessites. Journal of Solid State Chemistry, 272, 234–243.10.1016/j.jssc.2019.02.017Search in Google Scholar

Chukhrov, F.V., Gorshkov, A.I., Sivtsov, A.V., and Berezovskaya, V.V. (1979) A new 14 Å mineral of the birnessite group in deep-sea micronodules. Nature, 280, 136–137.10.1038/280136a0Search in Google Scholar

Cygan, R.T., Post, J.E., Heaney, P.J., and Kubicki, J.D. (2012) Molecular models of brinessite and related hydrated layered minerals. American Mineralogist, 97, 1505–1514.10.2138/am.2012.3957Search in Google Scholar

Drits, V.A., Silvester, E., Gorshkov, A.I., and Manceau, A. (1997) Structure of synthetic monoclinic Na-rich birnessite and hexagonal birnessite: I. Results from X‑ray diffraction and selected-area electron diffraction. American Mineralogist, 82, 946–961.10.2138/am-1997-9-1012Search in Google Scholar

Drits, V.A., Lanson, B., Gorshkov, A.I., and Manceau, A. (1998) Substructure and superstructure of four-layer Ca-exchanged birnessite. American Mineralogist, 83, 97–118.10.2138/am-1998-1-210Search in Google Scholar

Ertl, A., Pertlik, F., Prem, M., Post, J.E., Kim, S.J., Brandstatter, F., and Schuster, R. (2005) Ranciéite crystals from Friesach, Carinthia, Austria. European Journal of Mineralogy, 17, 163–172.10.1127/0935-1221/2005/0017-0163Search in Google Scholar

Feng, X.H., Liu, F., Tan, W.F., and Liu, X.W. (2004) Synthesis of birnessite from the oxidation of Mn2+ by O2 in alkali medium: Effects of synthesis conditions. Clays and Clay Minerals, 52(2), 240–250.10.1346/CCMN.2004.0520210Search in Google Scholar

Feng, X.H., Zhai, L.M., Tan, W.F., Liu, F., and He, J.Z. (2007) Adsorption and redox reactions of heavy metals on synthesized Mn oxide minerals. Environmental Pollution, 147(2), 366–373.10.1016/j.envpol.2006.05.028Search in Google Scholar PubMed

Finger, L.W., Cox, D.E., and Jephcoat, A.P. (1994) A correction for powder diffraction peak asymmetry due to axial divergence. Journal of Applied Crystallography, 27(6), 892–900.10.1107/S0021889894004218Search in Google Scholar

Fischel, M.H., Fischel, J.S., Lafferty, B.J., and Sparks, D.L. (2015) The influence of environmental conditions on kinetics of arsenite oxidation by manganese-oxides. Geochemical Transactions, 16, 15.10.1186/s12932-015-0030-4Search in Google Scholar PubMed PubMed Central

Fischer, T.B. (2010) Structural transformations of birnessite (δ-MnO2 during biological and abiological reduction. Doctoral dissertation, Pennsylvania State University.Search in Google Scholar

Fischer, T.B., Heaney, P.J., and Post, J.E. (2018) Changes in the structure of birnessite during siderophore-promoted dissolution: A time-resolved synchrotron X‑ray diffraction study. Chemical Geology, 476, 46–58.10.1016/j.chemgeo.2017.11.003Search in Google Scholar

Fleeger, C.R., Heaney, P.J., and Post, J.E. (2013) A time-resolved X‑ray diffraction study of Cs exchange into hexagonal H-birnessite. American Mineralogist, 98, 671–679.10.2138/am.2013.4287Search in Google Scholar

Frey, C.E., Wiechen, M., and Kurz, P. (2014) Water-oxidation catalysis by synthetic manganese oxides-systematic variations of the calcium birnessite theme. Dalton Transactions, 43(11), 4370–4379.10.1039/C3DT52604FSearch in Google Scholar PubMed

Golden, D.C., Dixon, J.B., and Chen, C.C. (1986) Ion exchange, thermal transformations, and oxidizing properties of birnessite. Clays and Clay Minerals, 34(5), 511–520.10.1346/CCMN.1986.0340503Search in Google Scholar

Grangeon, S., Lanson, B., Miyata, N., Tani, Y., and Manceau, A. (2010) Structure of nanocrystalline phyllomanganates produced by freshwater fungi. American Mineralogist, 95, 1608–1616.10.2138/am.2010.3516Search in Google Scholar

Händel, M., Rennert, T., and Totsche, K.U. (2013) A simple method to synthesize birnessite at ambient pressure and temperature. Geoderma, 193-194, 117–121.10.1016/j.geoderma.2012.09.002Search in Google Scholar

Heaney, P.J. (2000) Phase transformations induced by solid solution. Reviews in Mineralogy and Geochemistry, 39, 135–174.10.1515/9781501509155-007Search in Google Scholar

Hinkle, M.A.G., Flynn, E.D., and Catalano, J.G. (2016) Structural response of phyllomanganates to wet aging and aqueous Mn(II). Geochimica et Cosmochimica Acta, 192, 220–234.10.1016/j.gca.2016.07.035Search in Google Scholar

Hou, H.J.M. (2011) Manganese-based materials inspired by photosynthesis for water-splitting. Materials, 4(10), 1693–1704.10.3390/ma4101693Search in Google Scholar

Hsu, Y.K., Chen, Y.C., Lin, Y.G., Chen, L.C., and Chen, K.H. (2011) Reversible phase transformation of MnO2 nanosheets in an electrochemical capacitor investigated by in situ Raman spectroscopy. Chemical Communications, 47, 1252–1254.10.1039/C0CC03902KSearch in Google Scholar

Ilton, E.S., Post, J.E., Heaney, P.J., Ling, F.T., and Kerisit, S.N. (2016) XPS determination of Mn oxidation states in Mn (hydr)oxides. Applied Surface Science, 366, 475–485.10.1016/j.apsusc.2015.12.159Search in Google Scholar

Jiao, F., and Frei, H. (2010) Nanostructured manganese oxide clusters supported on mesoporous silica as efficient oxygen-evolving catalysts. Chemical Communications, 46(17), 2920–2922.10.1039/b921820cSearch in Google Scholar

Jones, L.H.P., and Milne, A.A. (1956) Birnessite, a new manganese oxide mineral from Aberdeenshire, Scotland. Mineralogical Magazine, 31, 283–288.10.1180/minmag.1956.031.235.01Search in Google Scholar

Julien, C. (2003) Raman spectra of birnessite manganese dioxides. Solid State Ionics, 159(3-4), 345–356.10.1016/S0167-2738(03)00035-3Search in Google Scholar

Kong, K.P. (2017) Mineralogical and geochemical constraints of chromium oxidation induced by birnessite. Master’s thesis, Pennsylvania State University.Search in Google Scholar

Kuma, K., Usui, A., Paplawsky, W., Gedulin, B., and Arrhenius, G. (1994) Crystal structures of synthetic 7 Å and 10 Å manganates substituted by mono- and divalent cations. Mineralogical Magazine, 58, 425–447.10.1180/minmag.1994.058.392.08Search in Google Scholar

Kwon, K.D., Refson, K., and Sposito, G. (2013) Understanding the trends in transition metal sorption by vacancy sites in birnessite. Geochimica et Cosmochimica Acta, 101, 222–232.10.1016/j.gca.2012.08.038Search in Google Scholar

Landrot, G., Ginder-Vogel, M., Livi, K., Fitts, J.P., and Sparks, D.L. (2012) Chromium(III) oxidation by three poorly crystalline manganese(IV) oxides. 2. Solid phase analyses. Environmental Science and Technology, 46(21), 11,601–11,609.Search in Google Scholar

Lanson, B., Drits, V.A., Silvester, E., and Manceau, A. (2000) Structure of H-exchanged hexagonal birnessite and its mechanism of formation from Na-rich monoclinic buserite at low pH. American Mineralogist, 85, 826–838.10.2138/am-2000-5-625Search in Google Scholar

Le Goff, P., Baffier, N., Bach, S., and Pereira-Ramos, J.P. (1996) Synthesis, ion exchange and electrochemical properties of lamellar phyllomanganates of the birnessite group. Materials Research Bulletin, 31(1), 63–75.10.1016/0025-5408(95)00170-0Search in Google Scholar

Lefkowitz, J.P., Rouff, A.A., and Elzinga, E.J. (2013) Influence of pH on the reductive transformation of birnessite by aqueous Mn(II). Environmental Science and Technology, 47(18), 10364–10371.10.1021/es402108dSearch in Google Scholar PubMed

Leinenweber, K. (2005) Welcome to the Crystal Cracker program page, by Kurt Leinenweber. http://multianvil.asu.edu/Crystal_Cracker/CrystalCracker.html (Accessed March 19, 2019.)Search in Google Scholar

Ling, F. T., Heaney, P.J., Post, J.E., and Gao, X. (2015) Transformations from triclinic to hexagonal birnessite at circumneutral pH induced through pH control by common biological buffers. Chemical Geology, 416, 1–10.10.1016/j.chemgeo.2015.10.007Search in Google Scholar

Ling, F.T., Post, J.E., Heaney, P.J., Kubicki, J.D., and Santelli, C.M. (2017) Fourier-transform infrared spectroscopy (FTIR) analysis of triclinic and hexagonal birnessites. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 178, 32–46.10.1016/j.saa.2017.01.032Search in Google Scholar PubMed

Ling, F.T., Post, J.E., Heaney, P.J., and Ilton, E.S. (2018) The relationship between Mn oxidation state and structure in triclinic and hexagonal birnessites. Chemical Geology, 479, 216–227.10.1016/j.chemgeo.2018.01.011Search in Google Scholar

Loewenstein, W. (1954) The distribution of aluminum in the tetrahedra of silicates and aluminates. American Mineralogist, 39, 92–96.Search in Google Scholar

Lopano, C.L., Heaney, P.J., Post, J.E., Hanson, J., and Komarneni, S. (2007) Time-resolved structural analysis of K- and Ba-exchange reactions with synthetic Na-bir-nessite using synchrotron X‑ray diffraction. American Mineralogist, 92, 380–387.10.2138/am.2007.2242Search in Google Scholar

Lopano, C.L., Heaney, P.J., and Post, J.E. (2009) Cs-exchange in birnessite: Reaction mechanisms inferred from time-resolved X‑ray diffraction and transmission electron microscopy. American Mineralogist, 94, 816–826.10.2138/am.2009.3068Search in Google Scholar

Lopano, C.L., Heaney, P.J., Bandstra, J.Z., Post, J.E., and Brantley, S.L. (2011) Kinetic analysis of cation exchange in birnessite using time-resolved synchrotron X‑ray diffraction. Geochimica et Cosmochimica Acta, 75, 3973–3981.10.1016/j.gca.2011.04.021Search in Google Scholar

Manceau, A., Lanson, B., and Drits, V.A. (2002) Structure of heavy metal sorbed bir-nessite. Part III: Results from powder and polarized extended X‑ray absorption fine structure spectroscopy. Geochimica et Cosmochimica Acta, 66(15), 2639–2663.Search in Google Scholar

Manning, B.A., Fendorf, S.E., Bostick, B., and Suarez, D.L. (2002) Arsenic(III) oxidation and arsenic(V) adsorption reactions on synthetic birnessite. Environmental Science and Technology, 36(5), 976–981.10.1021/es0110170Search in Google Scholar PubMed

McKenzie, R.M. (1971) The synthesis of birnessite, cryptomelane, and some other oxides and hydroxides of manganese. Mineralogical Magazine, 38(296), 493–502.10.1180/minmag.1971.038.296.12Search in Google Scholar

Post, J.E. (1999) Manganese oxide minerals: Crystal structures and economic and environmental significance. Proceedings of the National Academy of Sciences, 96(7), 3447–3454.10.1073/pnas.96.7.3447Search in Google Scholar PubMed PubMed Central

Post, J.E., and Burnham, C.W. (1986) Ionic modeling of mineral structures and energies in the electron gas approximation: TiO2 polymorphs, quartz, forsterite, diopside. American Mineralogist, 71, 142–150.Search in Google Scholar

Post, J.E., and Veblen, D.R. (1990) Crystal structure determinations of synthetic sodium, magnesium, and potassium birnessite using TEM and the Rietveld method. American Mineralogist, 75, 477–489.Search in Google Scholar

Post, J.E., Heaney, P.J., and Hanson, J. (2002) Rietveld refinement of a triclinic structure for synthetic Na-birnessite using synchrotron powder diffraction data. Powder Diffraction, 17(3), 218–221.10.1154/1.1498279Search in Google Scholar

Post, J.E., Heaney, P.J., and Hanson, J. (2003a) Synchrotron X‑ray diffraction study of the structure and dehydration behavior of todorokite. American Mineralogist, 88, 142–150.10.2138/am-2003-0117Search in Google Scholar

Post, J.E., Heaney, P.J., Cahill, C.L., and Finger, L.W. (2003b) Woodruffite: A new Mn oxide structure with 3 × 4 tunnels. American Mineralogist, 88, 1697–1702.10.2138/am-2003-11-1209Search in Google Scholar

Post, J.E., Heaney, P.J., and Ertl, A. (2008) Rietveld refinement of the ranciéite structure using synchrotron powder diffraction data. Powder Diffraction, 23(01), 10–14.10.1154/1.2836477Search in Google Scholar

Prescher, C., and Prakapenka, V.B. (2015) DIOPTAS: A program for reduction of two-dimensional X‑ray diffraction data and data exploration. High Pressure Research, 35, 223–230.10.1080/08957959.2015.1059835Search in Google Scholar

Rietveld, H.M. (1969) A profile refinement method for nuclear and magnetic structures. Journal of Applied Crystallography, 2(2), 65–71.10.1107/S0021889869006558Search in Google Scholar

Santelli, C.M., Webb, S.M., Dohnalkova, A.C., and Hansel, C.M. (2011) Diversity of Mn oxides produced by Mn (II)-oxidizing fungi. Geochimica et Cosmochimica Acta, 75, 2762–2776.10.1016/j.gca.2011.02.022Search in Google Scholar

Sauer, K., and Yachandra, V.K. (2002) A possible evolutionary origin for the Mn4 cluster of the photosynthetic water oxidation complex from natural MnO2 precipitates in the early ocean. Proceedings of the National Academy of Sciences, 99(13), 8631–8636.10.1073/pnas.132266199Search in Google Scholar PubMed PubMed Central

Shumlas, S.L., Singireddy, S., Thenuwara, A.C., Attanayake, N.H., Reeder, R.J., and Strongin, D.R. (2016) Oxidation of arsenite to arsenate on birnessite in the presence of light. Geochemical Transactions, 17, 5.10.1186/s12932-016-0037-5Search in Google Scholar PubMed PubMed Central

Silvester, E., Manceau, A., and Drits, V.A. (1997) Structure of synthetic monoclinic Na-rich birnessite and hexagonal birnessite: II. Results from chemical studies and EXAFS spectroscopy. American Mineralogist, 82, 962–978.10.2138/am-1997-9-1013Search in Google Scholar

Stephens, P. (1999) Phenomenological model of anisotropic peak broadening in powder diffraction. Journal of Applied Crystallography, 32(2), 281–289.10.1107/S0021889898006001Search in Google Scholar

Tan, W.F., Lu, S.J., Liu, F., Feng, X.H., He, J.Z., and Koopall, L.K. (2008) Determination of the point-of-zero, charge of manganese oxides with different methods including an improved salt titration method. Soil Science, 173(4), 277–286.10.1097/SS.0b013e31816d1f12Search in Google Scholar

Tan, H., Zhang, G.X., Heaney, P.J., Webb, S.M., and Burgos, W.D. (2010) Characterization of manganese oxide precipitates from Appalachian coal mine drainage treatment systems. Applied Geochemistry, 25(3), 389–399.10.1016/j.apgeochem.2009.12.006Search in Google Scholar

Tebo, B.M., Bargar, J.R., Clement, B.G., Dick, G.J., Murray, K.J., Parker, D., Verity, R., and Webb, S.M. (2004) Biogenic manganese oxides: Properties and mechanisms of formation. Annual Reviews in Earth and Planetary Science, 32, 287–328.10.1146/annurev.earth.32.101802.120213Search in Google Scholar

Thompson, P., Cox, D.E., and Hastings, J.B. (1987) Rietveld refinement of Debye-Scherrer synchrotron X‑ray data from Al2O3 Journal of Applied Crystallography, 20(2), 79–83.10.1107/S0021889887087090Search in Google Scholar

Toby, B.H., and Von Dreele, R.B. (2013) GSAS-II: The genesis of a modern open-source all purpose crystallography software package. Journal of Applied Crystallography, 46(2), 544–549.10.1107/S0021889813003531Search in Google Scholar

Turner, S., and Post, J.E. (1988) Refinement of the substructure and superstructure of romanechite. American Mineralogist, 73, 1155–1161.Search in Google Scholar

Umena, Y., Kawakami, K., Shen, J.R., and Kamiya, N. (2011) Crystal structure of oxygen-evolving photosystem II at a resolution of 1.9 Å. Nature, 473, 55–60.10.1038/nature09913Search in Google Scholar PubMed

Wang, M.X., Wang, Y.P., Tan, W.F., Liu, F., Feng, X.H., and Koopal, L.K. (2010) Effect of 1-1 electrolyte concentration on the adsorption/desorption of copper ion on synthetic birnessite. Journal of Soils and Sediments, 10(5), 879–885.10.1007/s11368-010-0230-6Search in Google Scholar

Wang, Y., Feng, X.H., Villalobos, M., Tan, W.F., and Liu, F. (2012) Sorption behavior of heavy metals on birnessite: Relationship with its Mn average oxidation state and implications for types of sorption sites. Chemical Geology, 292, 25–34.10.1016/j.chemgeo.2011.11.001Search in Google Scholar

Webb, S.M., Tebo, B.M., and Bargar, J.R. (2005) Structural characterization of biogenic Mn oxides produced in seawater by the marine Bacillus sp. strain SG-1. American Mineralogist, 90, 1342–1357.10.2138/am.2005.1669Search in Google Scholar

Wiechen, M., Zaharieva, I., Dau, H., and Kurz, P. (2012) Layered manganese oxides for water-oxidation: alkaline earth cations influence catalytic activity in a photosystem II-like fashion. Chemical Science, 3(7), 2330–2339.10.1039/c2sc20226cSearch in Google Scholar

Witzke, T., Pöllmann, H., Gardolinski, J.E.F.C., and Sommariva, M. (2017) Lagalyite, IMA 2016-106. CNMNC Newsletter No. 36, April 2017, page 406; Mineralogical Magazine, 81, 403–409.Search in Google Scholar

Yamaguchi, K., Shoji, M., Isobe, H., Yamanaka, S., Umena, Y., Kawakami, K., and Kamiya, N. (2017) On the guiding principles for understanding of geometrical structures of the CaMn4O5 cluster in oxygen-evolving complex of photosystem II. Proposal of estimation formula of structural deformations via the Jahn-Teller effects. Molecular Physics, 115, 636–666.10.1080/00268976.2016.1278476Search in Google Scholar

Yang, L.F., Cheng, S., Ji, X., Jiang, Y., Zhou, J., and Liu, M.L. (2015) Investigations into the origin of pseudocapacitive behavior of Mn3O4 electrodes using in operando Raman spectroscopy. Journal of Materials Chemistry A, 3(14), 7338–7344.10.1039/C5TA00223KSearch in Google Scholar

Yin, H., Liu, F., Feng, X., Hu, T., Zheng, L., Qiu, G., Koopal, L.K., and Tan, W. (2013) Effects of Fe doping on the structures and properties of hexagonal bir-nessites—Comparison with Co and Ni doping. Geochimica et Cosmochimica Acta, 117, 1–15.10.1016/j.gca.2013.04.020Search in Google Scholar

Zaharieva, I., Gonzalez-Flores, D., Asfari, B., Pasquini, C., Mohammadi, M.R., Klingan, K., Zizak, I., Loos, S., Chernev, P., and Dau, H. (2016) Water oxidation catalysis-role of redox and structural dynamics in biological photosynthesis and inorganic manganese oxides. Energy and Environmental Science, 9, 2433–2443.10.1039/C6EE01222ASearch in Google Scholar

Zhang, C., Chen, C., Dong, H., Shen, J.R., Dau, H., and Zhao, J. (2015) A synthetic Mn4Ca-cluster mimicking the oxygen-evolving center of photosynthesis. Science, 348, 690–693.10.1126/science.aaa6550Search in Google Scholar PubMed

Zhao, H., Zhu, M., Li, W., Elzinga, E.J., Villalobos, M., Liu, F., Zhang, J., Feng, X., and Sparks, D.L. (2016) Redox reactions between Mn(II) and hexagonal birnessite change its layer symmetry. Environmental Science and Technology, 50(4), 1750–1758.10.1021/acs.est.5b04436Search in Google Scholar PubMed

Received: 2019-05-10
Accepted: 2020-05-20
Published Online: 2020-12-31
Published in Print: 2021-01-27

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