Mathematics – Logic
Scientific paper
Jan 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975gecoa..39...11c&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 39, Issue 1, pp.11-22
Mathematics
Logic
4
Scientific paper
Zircon has been synthesized from a large number of mineral salts and also from one organic compound of zirconium. Its crystallization requires an acid reactive environment. The obtained crystals have been studied morphologically and the crystallographic forms obtained are linked to the presence of specific ions. The study of substitutions in the zircon network shows that hydro-zircon Zr ( SiO 4 ) 1- x ( OH ) 4 x will form only when fluorine is present. Other varieties of the and phases ZrSiO 4 have been obtained, substituting Hf, U, for Zr, and Ge for Si and an immiscible phase ThSiO 4 . Germanium enters the zircon network only at low temperature. Uranium and Hf, but not Th, can substitute for Zr in zircon.
Baumer Alain
Caruba Raoul
Turco Guy
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