NaCaAlSiAlSi2O8

NaCaAlSiAlSi2O8 is a complex chemical formula representing a member of the sodalite group of minerals. This group is characterized by their framework structures composed of aluminum and silicon tetrahedra, which enclose large cavities that can accommodate various cations, including sodium (Na) and calcium (Ca) in the case of NaCaAlSiAlSi2O8. The mineral is typically found in igneous rocks, particularly in association with nepheline syenites and other alkaline igneous rocks. It is also known to occur in metamorphic rocks and as a secondary mineral in pegmatites.

The crystal structure of NaCaAlSiAlSi2O8 is characterized by its three-dimensional framework, which is a common feature of the sodalite group. This framework is formed by the linkage of aluminum and silicon tetrahedra, with the large cavities within the structure hosting the sodium and calcium cations. The mineral is typically colorless to white, but can also exhibit shades of blue, green, or yellow due to the presence of trace elements.

NaCaAlSiAlSi2O8 is of interest to geologists and mineralogists due to its association with specific rock types and its role in understanding the petrogenesis of alkaline igneous rocks. It is also studied for its potential economic value, as it can be a source of aluminum and other valuable metals. However, its rarity and the challenges associated with its extraction and processing limit its commercial significance.