Miguelromeroite
	Kampf A R, Ross C R
	American Mineralogist 73 (1988) 1172-1178
	End-member villyaellenite from Mapimi, Durango, Mexico: Descriptive mineralogy,
	crystal structure, and implications for the ordering of Mn and Ca in type
	villyaellenite
	Note: refinition of villyaellenite and introduction of miguelromeroite
	results in a name change for this structure refinement
	Locality: Mapimi, Durango, Mexico
	_database_code_amcsd 0001199
	18.015 9.261 9.770 90 96.238 90 C2/c
	atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
	Mn1 .5 .3943 .75 .97 .0210 .0240 .0062 0 .0011 0
	Mn2 .3150 .0874 .1878 .84 .0220 .0220 .0170 .0014 .0005 .0009
	Zn2 .3150 .0874 .1878 .16 .0220 .0220 .0170 .0014 .0005 .0009
	Mn3 .3257 .4713 .1375 .96 .0218 .0238 .0175 -.0006 .0015 -.0021
	Ca3 .3257 .4713 .1375 .04 .0218 .0238 .0175 -.0006 .0015 -.0021
	As1 .4168 .3157 .4109 .0218 .0236 .0146 .0007 .0005 .0000
	As2 .6611 .2363 .6239 .0198 .0226 .0149 -.0001 .0001 .0004
	O1 .4237 .4360 .2892 .0224 .0270 .0198 .0038 .0001 .0029
	O2 .3389 .2240 .3631 .0297 .0354 .0156 .0003 .0003 -.0022
	O3 .4150 .3915 .5657 .0187 .0418 .0263 .0006 -.0085 .0049
	O4 .6648 .2574 .4528 .0244 .0275 .0073 -.0031 .0028 -.0002
	O5 .7069 .0874 .6788 .0272 .0239 .0193 -.0041 -.0026 .0104
	O6 .7040 .3774 .7046 .0207 .0317 .0266 .0053 .0002 -.0134
	O7 .5707 .2276 .6557 .0097 .0396 .0298 .0026 -.0003 -.0085
	OH .4897 .1981 .4226 .0257 .0400 .0294 .0087 -.0043 -.0069
	Wat1 .2416 .4219 .4702 .0245 .0320 .0236 .0005 -.0039 .0032
	Wat2 .5835 .0053 .8397 .0393 .0343 .0296 .0011 .0054 .0055
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