Pressure-induced dehydration of dioptase: A single-crystal X …
2019年2月1日 · We present a synchrotron-based, single-crystal X-ray diffraction and Raman spectroscopy study of natural green dioptase (Cu 6 Si 6 O 18 ·6H 2 O) up to ∼30 GPa at room temperature. The lattice parameters of dioptase exhibit continuous compression behavior up to ∼14.5 GPa, whereupon a structural transition is observed.
A refinement of the structure of dioptase, Cu - GeoScienceWorld
The crystal structure of dioptase, Cu 6 [Si e O 18]-6H 2 0 (a = 14.566, с = 7.778 A, R 3), was refined to R = 0.039 using 969 non-zero reflections. The structure consists of puckered trigonal rings of six water molecules with an ice-like configuration sandwiched between similarly puckered trigonal rings of six silicate tetrahedra bonded ...
The crystal structure of dioptase, Cu.[Si6O,s] .6H"O (a : 14.566, c = 7.778 A, R3;, was refined to R : 0.039 using 969 non-zero reflections. The structure consists of puckered trigonal rings of six water molecules with an ice-like configuration sandwiched between
Large quantum fluctuations in the strongly coupled spin-
2010年7月22日 · To refine the ${J}_{c}$ and ${J}_{d}$ values and to confirm the proposed spin model, we perform quantum Monte Carlo simulations for the dioptase spin lattice. The derived magnetic susceptibility, the magnetic ground state, and the sublattice magnetization are in remarkably good agreement with the experimental data.
Cu6[Si6O18]·6H2O, dioptase (CuSiO3[H2O]) Crystal Structure
Published Formula: Cu 6 [Si 6 O 18]·6H 2 O, dioptase Refined Formula: CuH 2 O 4 Si Wyckoff Sequence: 148,f 6; Z Formula Units: 18 Density: ρ = 3.28 Mg·m −3
Dioptase - Chester F. Carlson Center for Imaging Science
EPR and optical spectra of Cu 2+ in dioptase. Ferroelectr. Lett. 6 (1986). Intricate absorption pattern. Value determined from X-band absorption at 250 mT. X-band spectrum courtesy of Olivia Kuzio and the Neidig Lab (University of Rochester, Rochester, NY).
Pressure-induced dehydration of dioptase: A single-crystal X-ray ...
AB - We present a synchrotron-based, single-crystal X-ray diffraction and Raman spectroscopy study of natural green dioptase (Cu6Si6O18·6H2O)up to ∼30 GPa at room temperature. The lattice parameters of dioptase exhibit continuous compression behavior up to ∼14.5 GPa, whereupon a structural transition is observed.
Pressure-induced dehydration of dioptase: A single-crystal X …
2018年11月1日 · We present a synchrotron-based, single-crystal X-ray diffraction and Raman spectroscopy study of natural green dioptase (Cu6Si6O18·6H2O) up to ∼30 GPa at room temperature. The lattice parameters...
Pressure-induced dehydration of dioptase: A single-crystal X-ray ...
2019年2月1日 · Semantic Scholar extracted view of "Pressure-induced dehydration of dioptase: A single-crystal X-ray diffraction and Raman spectroscopy study" by F. Qin et al.
Dioptase - Wikipedia
Dioptase is a cyclosilicate mineral consisting of Si 6 O 18 rings which are linked together by Jahn–Teller distorted octahedral d 9 Cu(II) ions. Each copper ion is coordinated by four cyclosilicate oxygens and two water molecules.