AM_Heulandite-K
Formula: K4.2 (Al4.3 Si13.7) O45.64 H46
Name: Heulandite-K
Unit cell: 17.636 17.934 7.397 90.0 116.0 90.0 , V=2102.78
Space group: C12/M1 (12)

Yang P , Armbruster T , Journal of Solid State Chemistry , 123 (1996) p.140-149, Na, K, Rb and Cs exchange in heulandite single-crystals: X-ray structure, refinements at 100 K, Sample: T = 100 K, Locality: Nasik, India