@article{fdi:23304,
  title = {{P}roperties of iron oxides in some {N}ew {C}aledonian oxisols},
  author = {{S}chwertmann, {U}. and {L}atham, {M}arc},
  editor = {},
  language = {{ENG}},
  abstract = {{O}xisols from two toposequences of {N}ew {C}aledonia formed from peridotite, consist essentially of {F}e oxides (goethite, hematite, maghemite). {T}hese {F}e oxides were characterized by their mineralogy, crystal size and morphology, {A}l substitution, thermal behaviour and dissolution kinetics in 6 {M} {HC}l at 25o{C}. {I}n one toposequence the samples were free of hematite (goethite only) at > 1050 m above sea level whereas at lower altitudes hematite was also present. {A}l substitution was generally low due to the low {A}l content of the peridotite, except in gibbsitic samples on rocks somewhat higher in {A}l. {T}he surface areas of goethite and hematite ranged between 50 and 150 m2 g-1. {D}ithionite-extractable {N}i and {C}r were between 0.2 and 2.2 % {N}i and 0.3 and 2.3 % {C}r. {T}he hematite-containing samples tended to be higher in {C}r and lower in {N}i, whereas the opposite held for samples containing goethite only. {M}aghemites had a low unit cell size (8.31-8.32 instead of 8.34-8.35 {A}ngstr{\^o}m) which was attributed to {A}l substitution. {D}ehydroxylation temperature of goethites was weakly correlated with {A}l substitution. {D}issolution kinetics could be described by a linear form of a modified first-order reaction with one straight line for samples containing goethite only and two lines for samples containing goethite plus hematite. ({R}{\'e}sum{\'e} d'auteur)},
  keywords = {{MINERALOGIE} ; {PERIDOTITE} ; {PROPRIETE} {CHIMIQUE} ; {PROPRIETE} {PHYSIQUE} ; {OXISOL} ; {OXYDE} {DE} {FER} ; {NOUVELLE} {CALEDONIE} {ET} {DEPENDANCES}},
  booktitle = {},
  journal = {{G}eoderma},
  volume = {39},
  numero = {2},
  pages = {105--123},
  ISSN = {0016-7061},
  year = {1986},
  DOI = {10.1016/0016-7061(86)90070-4},
  URL = {https://www.documentation.ird.fr/hor/fdi:23304},
}