Calcium aluminosilicate

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| CASNo = 37342-39-5

| ChemSpiderID = 32698750

| PubChem = 56843091

| EINECS = 253-476-9

| UNII = 98139KV0X6

| StdInChI=1S/2Al.Ca.2O4Si/c;;;2*1-5(2,3)4/q2*+3;+2;2*-4

| StdInChIKey = GWWPLLOVYSCJIO-UHFFFAOYSA-N

| SMILES = [O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[Al+3].[Al+3].[Ca+2]

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| Formula = CaAl₂Si₂O₈

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Calcium aluminosilicate, an aluminosilicate compound with calcium cations, most typically has formula CaAl₂Si₂O₈.{{cite web |title=Compound Summary for CID 21881395 - Calcium Aluminosilicate |url=https://pubchem.ncbi.nlm.nih.gov/compound/21881395 |publisher=PubChem}}

In minerals, as a feldspar, it can be found as anorthite, an end-member of the plagioclase series.