@article{fdi:010066230,
  title = {{R}eaction mechanisms in talc under ionizing radiation : evidence of a high stability of {H}-center dot atoms},
  author = {{L}aine, {M}. and {A}llard, {T}. and {B}alan, {E}tienne and {M}artin, {F}. and {V}on {B}ardeleben, {H}. {J}. and {R}obert, {J}. {L}. and {L}e {C}aer, {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he reactivity under ionizing radiation of synthetic and natural talc was studied. {T}he two samples were chosen as models of nonswelling clays. {H}-2 production measurements evidenced that the {H}-2 yield in synthetic talc was of the same order of magnitude as in water, implying a very efficient production, and then recombination, of hydrogen atoms arising from the lysis of structural -{OH} groups. {T}his yield was 30 times smaller in natural talc. {T}he discrepancy between synthetic and natural talc is most likely related to transition elements cationic impurities in the latter. {E}ven if they are present in very small amounts, they are able to efficiently scavenge the electrons and/or the hydrogen atoms. {T}he produced defects in irradiated synthetic talc were investigated by means of electron paramagnetic resonance ({EPR}) spectroscopy, which enabled proposing reaction mechanisms. {L}astly, the {EPR} spectra evidenced the presence, at 298 {K}, of hydrogen atoms, which were detected few days after irradiation in both types of talc. {T}his surprisingly high stability was mainly attributed to the absence of water molecules. {I}t is proposed that the hydrogen atoms are stabilized in octahedra between two tetraedra sheets.},
  keywords = {},
  booktitle = {},
  journal = {{J}ournal of {P}hysical {C}hemistry {C}},
  volume = {120},
  numero = {4},
  pages = {2087--2095},
  ISSN = {1932-7447},
  year = {2016},
  DOI = {10.1021/acs.jpcc.5b11396},
  URL = {https://www.documentation.ird.fr/hor/fdi:010066230},
}