Refinement of two different crystal structures simultaneously from a multiple-crystal sample: neutron study of 3-deazauracil and lead hydrogen arsenate at 100 K

The structures of 5-deazauracil and lead hydrogen arsenate have been studied by neutron single crystal diffraction at 100 K, using a sample containing one crystal of each material. The experiment on the composite sample was entirely routine, using recently developed multiple-crystal techniques. The structures themselves represent the best low temperature neutron determinations on each of these materials and are discussed. (C) 2001 Elsevier Science B.V. All rights reserved.