Halloysite Mehmel M Zeitschrift fur Kristallographie 90 (1935) 35-43 Uber die Struktur von Halloysit und Metahalloysit Locality: not given _database_code_amcsd 0018093 5.15 8.9 7.57 90 100. 90 Cm atom x y z Al .25 1/6 0 Si .008 1/6 .433 OH1 .454 0 .159 OH2 .546 .5 -.159 OH3 .046 .333 -.159 O1 .008 0 .542 O2 .283 .25 .542 O3 -.046 -.167 .159