Organic protomolecule assembly in igneous minerals Journal Article uri icon

DCO ID 11121/4201-7640-3581-9770-CC

in language

  • eng

year of publication

  • 2001

abstract

  • {C-H stretching bands, nu (CH), in the infrared spectrum of single crystals of nominally high purity, of laboratory-grown MgO, and of natural upper mantle olivine, provide an "organic" signature that closely resembles the symmetrical and asymmetrical C-H stretching modes of aliphatic -CH(2) units. The nu (CH) bands indicate that H(2)O and CO(2), dissolved in the matrix of these minerals, converted to form H(2) and chemically reduced C, which in turn formed C-H entities, probably through segregation into defects such as dislocations. Heating causes the C-H bonds to pyrolyze and the nu (CH) hands to disappear, but annealing at 70 degreesC causes them to reappear within a few days or weeks. Modeling dislocations in MgO suggests that the segregation of C can lead to C(x) chains

volume

  • 98

issue

  • 5