Cornwallite Arlt T, Armbruster T Neues Jahrbuch fur Mineralogie, Monatshefte 1999 (1999) 468-480 Single-crystal X-ray structure refinement of cornwallite, Cu5(AsO4)2(OH)4: A comparison with its polymorph cornubite and the (PO4)-analogue pseudomalachite Locality: Clara mine, Oberwolfach, Black Forest, Germany Note: Biso for O2 and O4 switched to match calculated values _database_code_amcsd 0014901 4.600 5.757 17.380 90 91.87 90 P2_1/c atom x y z occ Biso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Cu1 0 0 0 1.12 .0134 .0123 .0171 .0010 .0036 .0029 Cu2 .95409 .01993 .41501 1.00 .0138 .0149 .0092 .0049 -.0014 .0007 Cu3 .00471 .18503 .24666 .92 .0140 .0071 .0134 -.0016 -.0064 .0015 As .47804 .41593 .36777 .9 .72 .0075 .0102 .0096 .0003 -.0017 -.0004 P .47804 .41593 .36777 .1 .72 .0075 .0102 .0096 .0003 -.0017 -.0004 O1 .2843 .3372 .4436 1.11 .013 .015 .015 -.001 .006 .000 O2 .6881 .1869 .3485 1.16 .015 .016 .014 .007 .002 -.001 O3 .2476 .4344 .2899 .91 .013 .005 .016 -.001 -.007 -.001 O4 .6692 .6566 .3791 1.8 .021 .017 .030 -.008 -.002 .000 O5 .8292 .3200 .0127 1.04 .010 .013 .016 -.002 .001 .000 O6 .1551 .9367 .3167 .79 .010 .008 .011 .002 -.004 .001 H5 .637 .297 .015 3.95 H6 .349 .924 .323 3.95