English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Oxidation state and distribution of Fe in pumpellyite, W8X4Y8Z12O56n(OH)n, was studied using Fe Mössbauer and X-ray Rietveld methods and semiquantitative analysis based on the intensity ratio of FeLβ and FeLα lines. The pumpellyite studied was collected from basic semischist, Chichibu belt, Ehime, Japan. Pumpellyite associated with epidote contains about 7.5 to 14.0wt% total Fe2O3, and pumpellyite which is not associated with epidote about 6.0 to 17.5wt% total Fe2O3. The Fe:Fe ratios estimated based on the ratios of the intensities of the FeLβ and FeLα lines are Fe:Fe=11-24:89-76 (mean Fe:Fe=17:83). The Fe:Fe ratio determined using Mössbauer method is 20(2):80(2). The Mössbauer doublet of Fe (Isomer shift (IS)=1.22mm/s; Quadrupole splitting (QS)=2.82mm/ s) was assigned to Fe at the X site, and that of Fe (IS=0.26mm/s; QS=1.06mm/s) to Fe at the Y and X sites. The unit cell parameters were refined as a=8.8456(4)Å, b=5.9393(2)Å, c=19.1614(8)Å, β =97.462(3)°, V=998.14(7)Å. Rietveld refinements gave Fe(X):Fe(Y) ratio of 43:57. By applying the Fe:Fe-ratio determined by the Mössbauer analysis, the site occupancies of Fe at X and Y sites given by Rietveld method and chemical analysis, the resulting formula is (Ca7.95Na0.01K0.02)Σ7.98(Al1.58Mg1.21Fe0.61Fe0.53Mn0.09 )Σ4.02(Al6.51Fe1.49V0.02Ti0.01)Σ8.03Si12.25O40.75(OH)15.25.The resulted intracrystalline distribution coefficient of Fe and Al between the X and Y sites (KD=(Fe/Al)/(Fe/Al)) is 1.69. The unit cell parameters and the cell volume increase with increasing Fe content in the pumpellyite. The mean Y-O distance increases with increasing mean ionic radii at the Y site. However, change of the mean X-O distance is not correlated with the mean ionic radii at the X site.

The oxidation state and distribution of Fe in pumpellyite from Chichibu belt, Ozu, Ehime, Japan