Lizardite-1T Gregorkiewitz M, Lebech B, Mellini M, Viti C American Mineralogist 81 (1996) 1111-1116 Hydrogen positions and thermal expansion in lizardite-1T from Elba: A low-temperature study using Rietveld refinement of neutron diffraction data T = 8 K _database_code_amcsd 0001834 5.3267 5.3267 7.2539 90 90 120 P31m atom x y z Uiso Si 1/3 2/3 .070 .020 Mg .324 0 .447 .020 H3 .646 0 .715 .078 H4 .046 .046 .172 .078 O1 1/3 2/3 .292 .002 O2 .507 0 -.014 .088 O3 .665 0 .587 .002 O4 0 0 .291 .002