Quadridavyne
	Bonaccorsi E, Merlino S, Orlandi P, Pasero M, Vezzalini G
	European Journal of Mineralogy 6 (1994) 481-487
	Quadridavyne, [(Na,K)6Cl2][Ca2Cl2][Si6Al6O24], a new feldspathoid
	mineral from Vesuvius area
	Note: Cl1 y-coordinate altered
	Locality: Vesuvius, Italy
	_database_code_amcsd 0006545
	25.771 25.771 5.371 90 90 120 P6_3/m
	atom x y z occ
	Naint(ab) .052 .106 1/4 .28
	Kint(ab) .052 .106 1/4 .10
	Namid(ab) .068 .139 1/4 .24
	Kmid(ab) .068 .139 1/4 .12
	Naext(ab) .091 .182 1/4 .20
	Kext(ab) .091 .182 1/4 .06
	Naint(c1) .391 .439 1/4
	Naint(c2) .587 .414 1/4
	Kext(c) .591 .683 1/4
	Si1 .1615 .2049 3/4
	Si2 .2921 .4597 3/4
	Si3 .041 .335 3/4
	Si4 .2082 .5408 1/4
	Al1 .0345 .2082 3/4
	Al2 .299 .333 3/4
	Al3 .168 .464 3/4
	Al4 .209 .6692 1/4
	O1 .105 .215 3/4
	O2 .060 .2844 3/4
	O3 .172 .002 .02
	O5 .294 .399 3/4
	O6 .211 .273 3/4
	O7 .667 -.005 .021
	O8 .669 .506 .508
	O9 .106 .398 3/4
	O10 .223 .445 3/4
	O11 .174 .511 .993
	O13 .220 .608 1/4
	O14 .276 .553 1/4
	Ca1 2/3 1/3 3/4
	Cl1 2/3 1/3 1/4
	Ca2 .334 .169 1/4
	Cl2 .3130 .1561 3/4
	Cl(a) -.018 .024 1/4 1/6
	Cl(b) .029 .047 1/4 1/6
	Cl(c) .529 .547 1/4
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