Record details

    The crystal structure of Co2P from X-ray powder diffraction data and its mineralogical applications
Statement of responsibility
    Roman Skála, Milan Drábek
    Drábek, Milan
    Skála, Roman
Source title - serial
    Věstník Českého geologického ústavu (Bulletin of the Czech Geological Survey)
    Vol. 76, no. 4
    p. 209-216
    6 obr., 6 tab., 35 bibl.
    Zkr. název ser.: Věst. Čes. geol. Úst. (Bull. Czech geol. Surv.)
Subject group
    krystalová struktura
    metoda prášková
    mřížka krystalová
Abstract (in english)
   The structure of stoichiometric Co2P was solved ab initio from powder diffraction data. We found the Co2P phase to be orthorhombic, space group Pnma. Unit-cell dimesions refined from powder data are a = 5.6479(4), b = 3.5129(2) A, c = 6.6078(4) A, V = 131.10(1) A3, number of formula units in the unit cell Z = 4. All atoms within the structure are located in 4c sites. prosphorus in nine-coordinated and cobalt atoms are fou and five-coordinated. Structure motifs found in Co2P are very different from those in member of Fe3P - Ni3P solid solution, which may explain the limited miscibility of the title compound in phosphide phases of the schreibersite-nickelphosphide series. Contrary to that, the similarities between the crystal structures of Co2P and members of the Fe2P-Ni2P solid solution invite the interpretation that relatively higher concentrations of Co could be accomodated in barringerite-type phases in meteorites.
   A complete mutual miscibility can be expected between Co2P and florenskyite (FeTiP)-like phases, which are isotypic
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    29. 1. 2008
Import date
    8. 8. 2012