@article{PAR00000902,
  title = {{T}he oxidation state of vanadium in titanomagnetite from layered basic intrusions},
  author = {{B}alan, {E}tienne and {D}e {V}illiers, {J}.{P}.{R}. and {E}eckhout, {S}.{G}. and {G}latzel, {P}. and {T}oplis, {M}. {J}. and {F}ritsch, {E}mmanuel and {A}llard, {T}. and {G}aloisy, {L}. and {C}alas, {G}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he redox conditions prevailing during the formation of vanadiferous titanomagnetites from three layered intrusions ({B}ushveld; {K}oillismaa; {S}kaergaard) have been estimated from the valence state of vanadium using synchrotron {X}-ray absorption near edge structure spectroscopy ({XANES}). {U}sing a high energy-resolution {X}-ray emission spectrometer, we show that vanadium occurs mostly as {V}3+, with minor {V}4+. {T}he most concentrated samples (up to 2.4 {W}t% {V}2{O}3) contain approximately 10% of vanadium as {V}4+. {B}oth {V}3+ and {V}4+ occur in the octahedral site of the spinel structure. {C}onsidering the low magnetite/melt {V}4+ partition coefficients, this suggests that vanadium ores crystallized under specific oxidizing conditions.},
  keywords = {trace elements ; {XAS} {XANES} ; igneous petrology ; new technique ; {AFRIQUE} {DU} {SUD}},
  booktitle = {},
  journal = {{A}merican {M}ineralogist},
  volume = {91},
  numero = {5-6},
  pages = {953--956},
  ISSN = {0003-004{X}},
  year = {2006},
  DOI = {10.2138/am.2006.2192},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00000902},
}