Crystal structure refinement of covellite

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August undefined, 2024

WebThe crystal structure of covellite has been studied under pressure up to 33 kbar based on single-crystal diffraction intensities collected with a four-circle diffractometer. The … WebThe crystal structure of covellite has been refined, based on counter intensity data, to R=3.9,°-6', using a crystal from Kosaka mine: P63/mmc, a=3.976(1), c=16.382(5)'\, Z=6. …

First-principles study of electronic structure and fermiology of ...

WebThe crystal structure of covellite CuS [space Erotp P6"/mmc, a : 3.7938(5)4, c : 16.341(l )Al has been refined using 237 counter-measured (MoKa) intensity data. The classic structure is confirmed, and z parameters determined as 0.10733(9) for Cu(2) and … WebCrystal structure refinement of covellite. American Mineralogist (1976) 61 (9-10): 996–1000. You do not have access to this content, please speak to your institutional … shannon lucas wcb

Crystal structure refinement of covellite

WebEvans H T, Konnert J A (1976) Crystal structure refinement of covellite, American Mineralogist, 61, 996-1000 Ohmasa M, Suzuki M, Takéuchi Y (1976) A refinement of … WebCRYSTAL STRUCTURE REFINEMENT of COVELLITE Rature Method Basedon 32 Samplingpoints Within (2) Least-Squaresrefinement in P6g/Mnc of Aniso- the Crystal; 12. Supergene Ore and Gangue Characteristics; Effect of RF Power on the Properties of Sputtered-Cus Thin Films For (1932) Has Described the Crystal Structure of Covellite As WebFeb 1, 2006 · The Cu 2p and S 2p photoelectron spectra from a fresh fracture surface of covellite (Fig. 1) are entirely consistent with the crystal structure and with a Cu(I) formal oxidation state, notwithstanding broad, energy loss-like components on the high binding energy side of both the Cu 2p and S 2p peaks.Because of the broad contribution on the … polywater® fsttm foam duct sealant

Covellite - Wikipedia

WebCovellite Crystallography: Axial Ratios: a:c = 1:4.31012 : Cell Dimensions: a = 3.792, c = 16.344, Z = 6; V = 203.53 Den(Calc)= 4.68 : Crystal System: Hexagonal - Dihexagonal … WebThe crystal structure proposed by Oftedal (1932) for covellite, CuS, is confirmed and found to hold also for klockmannite, CuSe. They are hexagonal with space group D 6k 4 … polywater j lubricant sdsWebThe crystal field orbitals of Cu+ in tetrahedrally coordinated sulfides are found to be less tightly bound than the S3p nonbonding orbitals by about 2–3 eV whereas the e and t 2 … shannon lucas scooby doo

"WebThe S-S distance of the S2 groups in the structure is 2.086(7)'\, the Cu-S distance in the CUS3 triangles 2.1915(4)'\, and the mean Cu-S distances in the CUS4 tetrahedra 2.313'\. The highly perfect cleavage characteristic of covellite may well be ascribed to the strong Cu-S bonds in the CuS3 triangles which form, sharing corners, con-tinuous ... " - Crystal structure refinement of covellite

Crystal structure refinement of covellite

Sonochemical Synthesis of Sulfur Doped Reduced Graphene …

WebRoberts H, Ksanda C (1929) The Crystal Structure of Covellite _cod_database_code 1010920 American Journal of Science 17 489-503: 1929: 0: 293: 0014418: Covellite: … WebOct 31, 2024 · The crystal structure of the chalcopyrite CuFeS 2 is shown in Fig. 1a. The tetragonal, chalcopyrite structure can be derived from the cubic structure of zinc blende (ZnS). ... Evans HT, Judith AK (1976) Crystal structure refinement of covellite. Am Mineral 61:996–1000. Google Scholar Alistair RL, David JV (1996) Spectroscopic studies …

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WebAt room temperature, covellite structure belongs to P6 3 /mmc (#194) space group (hexagonal symmetry) with Z = 6 per unit cell. Cu atoms are in two different … WebThe crystal structure of covellite, CuSe (sic) and klockmaninite, CuSe. Am. Mineralogist 39, 504–509 ... A computer programme for the refinement of cell dimensions and for the indexing of powder photographs. Arkiv Kemi 28, 179–190 (1967). Google Scholar Moh, G.: Low-temperature sulfide synthesis. Carnegie Inst. Wash. Year Book 62, 214 ...

WebDec 19, 2016 · [22] Evans H T and Konnert J A 1976 Crystal-structure refinement of covellite Am. Mineral. 61 996–1000. Go to reference in article; Google Scholar [23] …

WebThe crystal structure of covellite has been refined, based on counter intensity data, to R=3.9%, using a crystal from Kosaka mine: P63⁄mmc, a=3.976(1), c=16.382(5)A, Z=6. … WebJul 13, 2006 · Abstract. This book covers advanced aspects of practical crystal structure refinement, focusing on practical problems in the everyday life of a crystallographer. After an introduction to SHELXL in the first chapter, the second chapter provides a brief survey of crystal structure refinement. The next few chapters address the various aspects of ...

WebCopper monosulfide is a chemical compound of copper and sulfur.It was initially thought to occur in nature as the dark indigo blue mineral covellite.However, it was later shown to …

WebEvans H T, Konnert J A (1976) Crystal structure refinement of covellite, American Mineralogist, 61, 996-1000 Ohmasa M, Suzuki M, Takéuchi Y (1976) A refinement of the crystal structure of covellite, CuS, Mineralogical Journal, 8, 311-319 Potter R W II (1977) An electrochemical investigation of the system copper-sulfur, Economic Geology, 72 ... polywater grime away wipesWebAug 27, 2012 · The crystal and molecular structures of the title compounds, ethyl 4-(4-hydroxyphenyl)-6-(6-methoxy-2-naphthyl)-2-oxocyclohex-3-ene-1-carboxylate (I) and ethyl 4-(3-bromophenyl)-6-(6-methoxy-2-naphthyl)-2-oxocyclohex-3-ene-1-carboxylate (II), are reported and confirmed by single crystal X-ray diffraction data. Compound (I), … shannon lucid ageWebSep 30, 2004 · The crystal structure consists of dimeric molecules. The complex has an inversion centre located at the middle of the dimer. Each cadmium atom is located in the centre of a capped octahedron and is coordinated by seven O atoms, five of which [O(2), O(3), O(4), O(5) and O(2A)] are from three different carboxylate groups and two [O(6) … poly water line vs pvcWebComposition. Covellite (CuS) belongs to the binary copper sulfides group, which has the formula Cu x S y and can have a wide-ranging copper/sulfur ratio from 1:2 to 2:1 (Cu/S) .Although the fundamental structure of covellite is CuS, research into its "superstructure" (large numbers of adjoined of CuS molecules) indicates that several of covellite's … shannon lucid deathWebCovellite is a very rare copper sulfide mineral that crystallizes in the form of masses, hexagonal crystals, or as a secondary coating over other copper minerals. Finding Covellite in crystal form is extremely rare and can sell … poly water pipe canadaWebApr 17, 2024 · Covellite Properties. Covellite is an opaque stone that usually has an indigo-blue, blue black, brassy yellow, deep red, or purplish color. It has a submetallic to resinous luster. It’s a copper mineral that presents a unique iridescence, which makes it a highly valued stone among collectors. The name Covellite comes from the Italian ... poly water lineWebView JMOL 3-D Structure : Covellite: Takeuchi Y, Kudoh Y, Sato G: Zeitschrift fur Kristallographie 173 (1985) 119-128: The crystal structure of covellite CuS: under high … polywater lz lubricant