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Doklady Chemistry, Vol. 391, Nos. 1–3, 2003, pp. 177–180. Translated from Doklady Akademii Nauk, Vol. 391, No. 2, 2003, pp. 203–206. Original Russian Text Copyright © 2003 by Rastsvetaeva, Rozenberg, Khomyakov, Rozhdestvenskaya. CHEMISTRY R. K. Rastsvetaeva*, K. A. Rozenberg**, A. P. Khomyakov***, and I. V. Rozhdestvenskaya**** Presented by Academician L.N. Kogarko February 10, 2003 Received February 14, 2003 The rare mineral canasite was first discovered in the The principal characteristics of the crystal and Khibiny massif, and its crystal structure was estab- details of the X-ray diffraction experiment are given in lished in 1969 [1]. The structure of canasite is based on Table 1. The structure of the mineral was refined within tubular [Si O ] fragments, which are linked via 12 30 the monoclinic system, using the atomic coordinates of closely packed zigzag “walls” formed by Na and Ca OH-canasite from the Khibiny massif [2] as the starting octahedra. The more recent structure refinement of model. In addition to the K(3) position, the K(3b) posi- another sample from the Khibiny alkaline massif [2] tion was revealed from a difference electron density revealed that the octahedral positions belonging to the synthesis. In addition, a position occupied by a water
Doklady Chemistry – Springer Journals
Published: Oct 5, 2004
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