title: Raman microscopy of synthetic goudeyite (YCu6(AsO4)2(OH)6 x 3H2O).
abstract: Raman microscopy has been used to study the molecular structure of a synthetic goudeyite (YCu(6)(AsO(4))(3)(OH)(6) x 3H(2)O). These types of minerals have a porous framework similar to that of zeolites with a structure based upon (A(3+))(1-x)(A(2+))(x)Cu(6)(OH)(6)(AsO(4))(3-x)(AsO(3)OH)(x). Two sets of AsO stretching vibrations were found and assigned to the vibrational modes of AsO(4) and HAsO(4) units. Two Raman bands are observed in the region 885-915 and 867-870 cm(-1) region and are assigned to the AsO stretching vibrations of (HAsO(4))(2-) and (H(2)AsO(4))(-) units. The position of the bands indicates a C(2v) symmetry of the (H(2)AsO(4))(-) anion. Two bands are found at around 800 and 835 cm(-1) and are assigned to the stretching vibrations of uncomplexed (AsO(4))(3-) units. Bands are observed at around 435, 403 and 395 cm(-1) and are assigned to the nu(2) bending modes of the HAsO(4) (434 and 400 cm(-1)) and the AsO(4) groups (324 cm(-1)).
authors: Inorganic Materials Research Program, School of Physical and Chemical Sciences, Queensland University of Technology, GPO Box 2434, Brisbane, Qld 4001, Australia. r.frost@qut.edu.au
authors: Ray L
authors: RL
authors: Frost
authors: Matt
authors: M
authors: Weier
authors: Wayde N
authors: WN
authors: Martens
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D001149:Arsenates / Q000737:chemistry; D001729:Bismuth / Q000737:chemistry; D003300:Copper / Q000737:chemistry*; D006878:Hydroxides / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D013059:Spectrum Analysis, Raman / Q000379:methods*; D014867:Water / Q000737:chemistry; D014961:X-Ray Diffraction; D015019:Yttrium / Q000737:chemistry*; D017641:Zeolites / Q000737:chemistry*
chemical_list: D001149:Arsenates; D006878:Hydroxides; C508918:mixite; D014867:Water; D017641:Zeolites; D015019:Yttrium; D003300:Copper; C031356:hydroxide ion; D000535:Aluminum; D001729:Bismuth