title: Vibrational spectroscopic study of the mineral tsumebite Pb2Cu(PO4,SO4)(OH).
abstract: The mineral tsumebite Pb2Cu(PO4)(SO4)(OH), a copper phosphate-sulfate hydroxide of the brackebuschite group has been characterised by Raman and infrared spectroscopy. The brackebuschite mineral group are a series of monoclinic arsenates, phosphates and vanadates of the general formula A2B(XO4)(OH,H2O), where A may be Ba, Ca, Pb, Sr, while B may be Al, Cu2+,Fe2+, Fe3+, Mn2+, Mn3+, Zn and XO4 may be AsO4, PO4, SO4,VO4. Bands are assigned to the stretching and bending modes of PO4(3-) and HOPO3 units. Hydrogen bond distances are calculated based upon the position of the OH stretching vibrations and range from 2.759 Å to 3.205 Å. This range of hydrogen bonding contributes to the stability of the mineral.
authors.affiliation: Chemistry Discipline, Faculty of Science and Technology, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia. r.frost@qut.edu.au
authors.forename: Ray L
authors.initials: RL
authors.lastname: Frost
authors.forename: Sara J
authors.initials: SJ
authors.lastname: Palmer
mesh_terms: D003300:Copper / Q000737:chemistry*; D006860:Hydrogen Bonding; D008903:Minerals / Q000737:chemistry*; D008956:Models, Chemical; D015394:Molecular Structure; D010165:Palladium / Q000737:chemistry*; D010710:Phosphates / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013059:Spectrum Analysis, Raman; D013431:Sulfates / Q000737:chemistry*; D014732:Vibration; D014867:Water / Q000737:chemistry*
chemical_list: D008903:Minerals; D010710:Phosphates; D013431:Sulfates; D014867:Water; D010165:Palladium; D003300:Copper