Watch the Dallas Symposium LIVE, and fundraiser auction
Ticket proceeds support mindat.org! - click here...
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic Time
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral Quiz
Photo SearchPhoto GalleriesSearch by ColorNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Grangeon, S., Lanson, B., Lanson, M., Manceau, A. (2008) Crystal structure of Ni-sorbed synthetic vernadite: a powder X-ray diffraction study. Mineralogical Magazine, 72 (6) 1279-1291 doi:10.1180/minmag.2008.072.6.1279

Advanced
   -   Only viewable:
Reference TypeJournal (article/letter/editorial)
TitleCrystal structure of Ni-sorbed synthetic vernadite: a powder X-ray diffraction study
JournalMineralogical Magazine
AuthorsGrangeon, S.Author
Lanson, B.Author
Lanson, M.Author
Manceau, A.Author
Year2008 (December)Volume72
Issue6
PublisherMineralogical Society
DOIdoi:10.1180/minmag.2008.072.6.1279Search in ResearchGate
Generate Citation Formats
Mindat Ref. ID243963Long-form Identifiermindat:1:5:243963:5
GUID0
Full ReferenceGrangeon, S., Lanson, B., Lanson, M., Manceau, A. (2008) Crystal structure of Ni-sorbed synthetic vernadite: a powder X-ray diffraction study. Mineralogical Magazine, 72 (6) 1279-1291 doi:10.1180/minmag.2008.072.6.1279
Plain TextGrangeon, S., Lanson, B., Lanson, M., Manceau, A. (2008) Crystal structure of Ni-sorbed synthetic vernadite: a powder X-ray diffraction study. Mineralogical Magazine, 72 (6) 1279-1291 doi:10.1180/minmag.2008.072.6.1279
Abstract/NotesAbstractVernadite is a nanocrystalline turbostratic phyllomanganate containing Ni, and is widespread in surface environments and oceanic sediments. To improve our understanding of Ni uptake in this mineral, two series of analogues of vernadite (δ-MnO2) were prepared with Ni/Mn atomic ratios of 0.002—0.105 at pH4 and 0.002—0.177 at pH 7. Their structures were characterized using X-ray powder diffraction (XRD). The δ-MnO2 nano-crystals are essentially monolayers with coherent scattering domains sizes of ∼10 Å perpendicular to the layering and ∼55 Å within the layer plane. For Ni/Mn < 0.01, the layer charge deficit is apparently balanced entirely by interlayer Mn, Na and protons. At higher Ni/Mn, Ni occupies the same site as interlayer Mn above and below vacant sites within the MnO2 layer and at sites along the edges of the layer. However, the layer charge is balanced differently at the two pH values. At pH 4, Ni uptake is accompanied by a reduction in structural Na and protons, whereas interlayer Mn remains strongly bound to the layers. At pH 7, interlayer Mn is less strongly bound and is partially replaced by Ni. The results of this study also suggest that the number of vacant octahedral sites and multi-valent charge-copmpensating interlayer species are underestimated by the currently used structure models of δ-MnO2.


See Also

These are possibly similar items as determined by title/reference text matching only.

 
and/or  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2025, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: August 19, 2025 12:16:15
Go to top of page