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Experimental evidence of sixfold oxygen coordination for phosphorus

  • Fabrice Brunet EMAIL logo , Anne-Marie Flank , Jean-Paul Itié , Tetsuo Irifune and Pierre Lagarde
Published/Copyright: April 1, 2015
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American Mineralogist
From the journal American Mineralogist Volume 92 Issue 7

Abstract

Phosphorus, a group V element, has always been found so far in minerals, biological systems, and synthetic compounds with an oxygen coordination number of four (i.e., PO4 groups). We demonstrate using phosphorus K-edge XANES spectroscopy that this element can also adopt a sixfold oxygen coordination (i.e., PO6 groups). This new coordination was achieved in phosphorus-doped (1 wt% P2O5 level) SiO2-stishovite synthesized at 18 GPa and 1873 K and quenched to ambient conditions. This change of phosphorus coordination at high pressure within a dense silicate structure is particularly relevant to phosphorus mineralogy (and geochemistry) in the deep Earth. With a mantle abundance below 0.25 wt%, phosphorus has been shown to be mainly hosted by silicates (e.g., olivine) in the Earth’s upper-mantle, in the fourfold-coordinated silicon sites. In the lower mantle where all silicon is sixfold coordinated, we show here that phosphorus has the crystal-chemical ability to remain incorporated into silicate structures.

Keywords: Phosphorus; coordination; XANES; stishovite; berlinite; lower mantle
Received: 2007-1-11
Accepted: 2007-2-28
Published Online: 2015-4-1
Published in Print: 2007-7-1

© 2015 by Walter de Gruyter Berlin/Boston

Articles in the same Issue

  1. Experimental evidence of sixfold oxygen coordination for phosphorus
  2. Dehydration of Ca-montmorillonite at the crystal scale. Part I: Structure evolution
  3. Dehydration of Ca-montmorillonite at the crystal scale. Part 2. Mechanisms and kinetics
  4. The high-pressure crystal structure of potassium hydrogen carbonate (KHCO3)
  5. Effect of Al3+ and H+ on the elastic properties of stishovite
  6. Investigation of synthetic Mg1.3V1.7O4 spinel with MgO inclusions: Case study of a spinel with an apparently occupied interstitial site
  7. Thermal expansion of deuterated hopeite, Zn3(PO4)2·4D2O
  8. Compression, thermal expansion, structure, and instability of CaIrO3, the structure model of MgSiO3 post-perovskite
  9. Crystal chemical relationships in the tourmaline group: Structural constraints on chemical variability
  10. The energetics of hematite dissolution in iron-oxide-rich melts: In situ high-temperature calorimetric studies
  11. A simple model of oscillatory zoning in magmatic plagioclase: Development of an isothermal undercooling model
  12. TEM investigation of Ca-rich plagioclase: Structural β uctuations related to the I1-P1 phase transition
  13. Crystal-chemistry of Ni in marine ferromanganese crusts and nodules
  14. Effect of structural transitions on properties of high-pressure silicate melts: 27Al NMR, glass densities, and melt viscosities
  15. Material conversion from paper-sludge ash in NaOH, KOH, and LiOH solutions
  16. High-pressure phase relations and crystal chemistry of calcium ferrite-type solid solutions in the system MgAl2O4-Mg2SiO4
  17. Origin of atoll garnets in eclogites and implications for the redistribution of trace elements during slab exhumation in a continental subduction zone
  18. Determination of the refractive index of particles in the clay and sub-micrometer size range
  19. Crystal chemistry of synthetic Ca2Al3Si3O12OH–Sr2Al3Si3O12OH solid-solution series of zoisite and clinozoisite
  20. Thermal infrared spectroscopy and modeling of experimentally shocked basalts
  21. P-V and T-V Equations of State of natural biotite: An in-situ high-pressure and high-temperature powder diffraction study, combined with Mössbauer spectroscopy
  22. Cation ordering in MgTi2O5 (karrooite): Probing temperature dependent effects with neutrons
  23. An order-disorder model for omphacitic pyroxenes in the system jadeite-diopsidehedenbergite- acmite, with applications to eclogitic rocks
  24. The high-pressure structural configurations of Ca0.2Sr0.8Al2Si2O8 feldspar: The I1̅-I2/c and I2/c-P21/c phase transitions
  25. Mechanisms of diamond oxidation and their bearing on the fluid composition in kimberlite magmas
  26. Brittle fracturing and fracture healing of zircon: An integrated cathodoluminescence, EBSD, U-Th-Pb, and REE study
  27. Galaxite, MnAl2O4, a spectroscopic standard for tetrahedrally coordinated Mn2+ in oxygen-based mineral structures
  28. Magmatic paragonite in trondhjemites from the Sierra del Convento mélange, Cuba
  29. Valence state partitioning of Cr and V between pyroxene-melt: Estimates of oxygen fugacity for martian basalt QUE 94201
  30. Crystal-structure refinement of Na-bearing clinopyroxenes from mantle-derived eclogite xenoliths
  31. High-pressure transition of CaCO3
https://doi.org/10.2138/am.2007.2570
Keywords for this article
Phosphorus; coordination; XANES; stishovite; berlinite; lower mantle

Articles in the same Issue

  1. Experimental evidence of sixfold oxygen coordination for phosphorus
  2. Dehydration of Ca-montmorillonite at the crystal scale. Part I: Structure evolution
  3. Dehydration of Ca-montmorillonite at the crystal scale. Part 2. Mechanisms and kinetics
  4. The high-pressure crystal structure of potassium hydrogen carbonate (KHCO3)
  5. Effect of Al3+ and H+ on the elastic properties of stishovite
  6. Investigation of synthetic Mg1.3V1.7O4 spinel with MgO inclusions: Case study of a spinel with an apparently occupied interstitial site
  7. Thermal expansion of deuterated hopeite, Zn3(PO4)2·4D2O
  8. Compression, thermal expansion, structure, and instability of CaIrO3, the structure model of MgSiO3 post-perovskite
  9. Crystal chemical relationships in the tourmaline group: Structural constraints on chemical variability
  10. The energetics of hematite dissolution in iron-oxide-rich melts: In situ high-temperature calorimetric studies
  11. A simple model of oscillatory zoning in magmatic plagioclase: Development of an isothermal undercooling model
  12. TEM investigation of Ca-rich plagioclase: Structural β uctuations related to the I1-P1 phase transition
  13. Crystal-chemistry of Ni in marine ferromanganese crusts and nodules
  14. Effect of structural transitions on properties of high-pressure silicate melts: 27Al NMR, glass densities, and melt viscosities
  15. Material conversion from paper-sludge ash in NaOH, KOH, and LiOH solutions
  16. High-pressure phase relations and crystal chemistry of calcium ferrite-type solid solutions in the system MgAl2O4-Mg2SiO4
  17. Origin of atoll garnets in eclogites and implications for the redistribution of trace elements during slab exhumation in a continental subduction zone
  18. Determination of the refractive index of particles in the clay and sub-micrometer size range
  19. Crystal chemistry of synthetic Ca2Al3Si3O12OH–Sr2Al3Si3O12OH solid-solution series of zoisite and clinozoisite
  20. Thermal infrared spectroscopy and modeling of experimentally shocked basalts
  21. P-V and T-V Equations of State of natural biotite: An in-situ high-pressure and high-temperature powder diffraction study, combined with Mössbauer spectroscopy
  22. Cation ordering in MgTi2O5 (karrooite): Probing temperature dependent effects with neutrons
  23. An order-disorder model for omphacitic pyroxenes in the system jadeite-diopsidehedenbergite- acmite, with applications to eclogitic rocks
  24. The high-pressure structural configurations of Ca0.2Sr0.8Al2Si2O8 feldspar: The I1̅-I2/c and I2/c-P21/c phase transitions
  25. Mechanisms of diamond oxidation and their bearing on the fluid composition in kimberlite magmas
  26. Brittle fracturing and fracture healing of zircon: An integrated cathodoluminescence, EBSD, U-Th-Pb, and REE study
  27. Galaxite, MnAl2O4, a spectroscopic standard for tetrahedrally coordinated Mn2+ in oxygen-based mineral structures
  28. Magmatic paragonite in trondhjemites from the Sierra del Convento mélange, Cuba
  29. Valence state partitioning of Cr and V between pyroxene-melt: Estimates of oxygen fugacity for martian basalt QUE 94201
  30. Crystal-structure refinement of Na-bearing clinopyroxenes from mantle-derived eclogite xenoliths
  31. High-pressure transition of CaCO3
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