The crystal structure of nordite and its relationship to melilite and datolite-gadolinite

Presents an analysis of the structure of nordite obtained from sodalite-syenite in the Lovozerski massif of the Kola Peninsula (Murmanskaya Oblast'). Results obtained based on a three-dimensional Patterson function are tabulated and graphed. The structure consists of compact layers of RE (Sr, C...

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Bibliographic Details
Published in:The American mineralogist 1970, Vol.55 (7-8), p.1167-1181
Main Authors: Bakakin, V. V, Belov, N. V, Borisov, S. V, Solovyeva, L. P
Format: Article
Language:English
Subjects:
Commonwealth of Independent States
crystal structure
datolite
datolite group
Europe
gadolinite
Kola Peninsula
Lovozerski massif
melilite
melilite group
mineral data
mineralogy
nesosilicates
Nordite
orthosilicates
Russian Federation
Russian Republic
silicates
sorosilicates
structure
USSR
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Summary:Presents an analysis of the structure of nordite obtained from sodalite-syenite in the Lovozerski massif of the Kola Peninsula (Murmanskaya Oblast'). Results obtained based on a three-dimensional Patterson function are tabulated and graphed. The structure consists of compact layers of RE (Sr, Ca) and Na square antiprisms and Na, Mn octahedra which are connected along the b-axis by a new kind of. T7O170000 flat net of tetrahedra formed by four-, five- and eight-rings. Nordite can be considered an unusual combination of melilite and datolite-gadolinite.
ISSN:0003-004X
1945-3027