CaAl2BSi6O20

CaAl2BSi6O20 is a chemical formula for a calcium aluminum borosilicate compound. The composition includes calcium (Ca), aluminum (Al), boron (B), silicon (Si), and oxygen (O), with six silicon and one boron atom per formula unit. The oxide framework suggested by the formula is typical of borosilicate networks.

Structurally, such a compound would feature a network built from tetrahedrally coordinated SiO4 and BO4 units linked together. Aluminum commonly occurs in tetrahedral AlO4 sites within the framework, while calcium acts as a charge-balancing cation occupying interstitial sites in the network. The exact arrangement can vary, leading to different crystal or glass-ceramic forms.

Natural occurrence: there is no widely documented mineral with this exact empirical formula; if it occurs naturally, it would be in borosilicate-bearing geological environments. More likely, CaAl2BSi6O20 is realized as a synthetic phase in glass-ceramics or ceramic materials derived from borosilicate systems.

Properties and applications: Such a phase would be expected to exhibit high thermal stability and chemical durability typical of borosilicate frameworks. It could be of interest for specialty ceramics, glass-ceramics, or optical materials, depending on crystallinity, grain size, and microstructure.

Related topics include borosilicate minerals and glasses, aluminoborosilicates, and calcium silicate systems.