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10.1038/s41467-018-03671-5 http://scihub22266oqcxt.onion/10.1038/s41467-018-03671-5 C5876394!5876394!29599446     free     free     free Deprecated: Implicit conversion from float 225.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 225.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534       Nat+Commun 2018 ; 9 (ä): ä Nephropedia Template TP {{tp|p=29599446|t=2018. Valence and spin states of iron are invisible in Earth?s lower mantle |pdf=|usr=}}{{29599446}} gab.com Text Valence and spin states of iron are invisible in Earth s lower mantle JO: Nat Commun http://www.kidney.de/pget.php?&tw=1&pmid=29599446 #FOAvip Heterogeneity in Earth?s mantle is a record of chemical and dynamic processes over Earth?s history. The geophysical signatures of heterogeneity can only be interpreted with quantitative constraints on effects of major elements such as iron on physical properties including density, compressibility, and electrical conductivity. However, deconvolution of the effects of multiple valence and spin states of iron in bridgmanite (Bdg), the most abundant mineral in the lower mantle, has been challenging. Here we show through a study of a ferric-iron-only (Mg0.46Fe3+0.53)(Si0.49Fe3+0.51)O3 Bdg that Fe3+ in the octahedral site undergoes a spin transition between 43 and 53?GPa at 300?K. The resolved effects of the spin transition on density, bulk sound velocity, and electrical conductivity are smaller than previous estimations, consistent with the smooth depth profiles from geophysical observations. For likely mantle compositions, the valence state of iron has minor effects on density and sound velocities relative to major cation composition. Twit Text FOAVip Valence and spin states of iron are invisible in Earth s lower mantle ????Nat Commun http://www.kidney.de/pget.php?&tw=1&pmid=29599446 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=29599446 #FOAvip English Wikipedia <ref>{{Cite pmid|29599446}}</ref> Valence and spin states of iron are invisible in Earth?s lower mantle #MMPMID29599446 Liu J; Dorfman SM; Zhu F; Li J; Wang Y; Zhang D; Xiao Y; Bi W; Alp EE Nat Commun 2018[]; 9 (ä): ä PMID29599446show ga Heterogeneity in Earth?s mantle is a record of chemical and dynamic processes over Earth?s history. The geophysical signatures of heterogeneity can only be interpreted with quantitative constraints on effects of major elements such as iron on physical properties including density, compressibility, and electrical conductivity. However, deconvolution of the effects of multiple valence and spin states of iron in bridgmanite (Bdg), the most abundant mineral in the lower mantle, has been challenging. Here we show through a study of a ferric-iron-only (Mg0.46Fe3+0.53)(Si0.49Fe3+0.51)O3 Bdg that Fe3+ in the octahedral site undergoes a spin transition between 43 and 53?GPa at 300?K. The resolved effects of the spin transition on density, bulk sound velocity, and electrical conductivity are smaller than previous estimations, consistent with the smooth depth profiles from geophysical observations. For likely mantle compositions, the valence state of iron has minor effects on density and sound velocities relative to major cation composition. äValence and spin states of iron are invisible in Earth?s lower mantle (epmc).pdf DeepDyve Pubget Overpricing