Zeolite A

Zeolite A structure from: Reed, T.B. and Breck, D.W. "Crystalline zeolites. II. Crystal structures of synthetic zeolite, type A" J. Am. Chem. Soc., 78, 5972-5977 (1956)

Model created by me in crystalmaker, stl prints well with little issue (bar a little trouble on the gentler overhangs). Print in images has been scaled up 300 % from file