Abstract
SCAPOLITE, a fairly common silicate mineral, occurs in a wide variety of metamorphic and altered igneous rocks. It is a crystalline solution, whose end-members are: NaC1.3NaAlSi3-O8 (marialite = Ma) and CaCO3.3CaAl2Si2O8 (meionite = Me). From the marialite end-member up to 25% marialite, the substitution of by CaCO3.Ca2+Al3+ takes place. From 25% marialite to the meionite end-member, the substitution is of the type: Na+Si4+ by Ca2+Al3+ as in plagioclase1.
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PHAKEY, P., GHOSE, S. Scapolite: Observation of Anti-Phase Domain Structure. Nature Physical Science 238, 78–80 (1972). https://doi.org/10.1038/physci238078a0
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DOI: https://doi.org/10.1038/physci238078a0
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