Heulandite-Ca
	Merkle A B, Slaughter M
	American Mineralogist 52 (1967) 273-276
	The crystal structure of heulandite (Ca,Na2)[Al2Si7O18].6H2O
	_database_code_amcsd 0000154
	17.73 17.82 7.43 90 116.33 90 Cm
	atom x y z occ
	Ca1 .147 0 .811
	Ca2 .435 0 .147
	Ca3 .242 .5 .300
	Si1 .109 .168 .405 .733
	Al1 .109 .168 .405 .267
	Si2 .002 .093 0 .733
	Al2 .002 .093 0 .267
	Si3 .080 .184 .782 .733
	Al3 .080 .184 .782 .267
	Si4 .342 .304 .909 .733
	Al4 .342 .304 .909 .267
	Si5 .287 .216 .5 .733
	Al5 .287 .216 .5 .267
	Si6 .495 .198 .216 .733
	Al6 .495 .198 .216 .267
	Si7 .468 .173 .593 .733
	Al7 .468 .173 .593 .267
	Si8 .216 .302 .086 .733
	Al8 .216 .302 .086 .267
	Si9 .072 .415 0 .733
	Al9 .072 .415 0 .267
	O1 .983 0 .947
	O2 .061 .130 .900
	O3 .102 .143 .605
	O4 .044 .122 .235
	O5 .292 .338 .018
	O6 .211 .167 .428
	O7 .142 .256 .943
	O8 .295 .259 .679
	O9 .084 .247 .314
	O10 .279 .283 .313
	O11 .370 .151 .559
	O12 .023 .404 .753
	O13 .081 .5 .044
	O14 .463 .162 .362
	O15 .492 .263 .663
	O16 .404 .376 .906
	O17 .020 .380 .117
	O18 .170 .383 .109
	O19 .407 .233 .055
	Wat1 .006 0 .528 .667
	Wat2 .294 .5 .038 .667
	Wat3 .296 .5 .767 .667
	Wat4 .065 .5 .518 .667
	Wat5 .386 0 .772 .667
	Wat6 .209 0 .601 .667
	Wat7 .256 .137 .005 .667
	Wat8 .211 .423 .509 .667
	Wat9 .360 .424 .469 .667
	Wat10 .389 0 .404 .667
	Wat11 .379 0 .291 .667
	Wat12 .208 0 .450 .667
	Wat13 .375 0 .520 .667
	Wat14 .222 .172 .109 .667
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