Recrystallization of Cold-Rolled Zr Single Crystals

2013 ◽  
Vol 753 ◽  
pp. 275-278 ◽  
Author(s):  
Margarita Isaenkova ◽  
Yuriy Perlovich ◽  
Nikolay Krapivka ◽  
Vladimir Fesenko ◽  
Olga Krymskaya ◽  
...  
Keyword(s):  
Single Crystals ◽  
Line Profile ◽  
Coarse Grained ◽  
X Ray ◽  
Commercially Pure ◽  
Cold Rolled ◽  
Ray Methods

Recrystallization of rolled Zr single crystals is considered in comparison with analogous recrystallization processes in rolled coarse-grained iodide Zr and polycrystalline plates of commercially pure Zr. Diffractometric X-ray methods were used by texture and X-ray line profile measurements. The treatment of obtained data included construction of correlation diagrams, connecting as-rolled and recrystallized conditions of samples. A number of recrystallization mechanisms, operating in rolled α-Zr under annealing, were revealed on the basis of found regularities of texture changes.

Über die Kristallstruktur von KSc2 F7 / The Crystal Structure of KSc2 F7

1985 ◽  
Vol 40 (6) ◽  
pp. 726-729 ◽  
Author(s):  
Klaus Güde ◽  
Christoph Hebecker
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Unit Cell ◽  
Space Group ◽  
X Ray ◽  
Monoclinic Unit Cell ◽  
R Value ◽  
Ray Methods

Abstract Single crystals of KSc2F7 have been prepared from a mixture of KF and ScF3 . The samples were investigated by X-ray methods. KSc2F7 crystallizes orthorhombically with a = 10.643(2), b = 6.540(1), c = 4.030(1) Å. These data indicate a close crystallographic connection to the monoclinic unit cell of KIn2F7 [1], But in contrast to KIn2F7 , KSc2 F7 crystallizes in space group No. 65. Cmmm - D192h. The R-value for 341 observed independent reflections is 0.060.

Die Kristallstruktur von SrHg(SeCN)4 · 4 Pyridin / The Crystal Structure of SrHg(SeCN)4 · 4 Pyridine

1984 ◽  
Vol 39 (5) ◽  
pp. 582-585 ◽  
Author(s):  
Klaus Brodersen ◽  
Manfred Cygan ◽  
Hans-Ulrich Hummel
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Experimental Error ◽  
Space Group ◽  
X Ray ◽  
Ray Methods

Single crystals of SrHg(SeCN)4 · 4 pyridine are prepared by reaction of K2Hg(SeCN)4 with SrCl2 in CH3OH/C2H5OH in the presence of pyridine.The crystal structure was solved with X-ray methods (Mr = 1024.1, space group P4̄n2, Z = 2, a = 9.552(2) Å, c = 17.610(7) Å, V = 1606.7 Å3, λ(AgKα) = 0.5583 Å, dc = 2.12 g cm-3, μ(AgKα) = 57.40 cm-1, F(000) = 943.7, T = 298 K. Final R = 0.043 for 1050 independent reflections).The structure consists of nearly tetrahedral Hg(SeCN)4-units. The SeCN-group is linear within the experimental error. The N-atoms of SeCN and pyridine contribute to the Archimedean antiprismatic coordination of strontium

Über das Erdalkalimetall-Lanthanoid-Kupfer-Oxomolybdat (Cu0,22Mg0 ,78)BaNd2Mo4O16/The Alkaline Earth Rare Earth Copper-Oxomolybdate (Cu0.22Mg0.78)BaNd2Mo4O16

1995 ◽  
Vol 50 (4) ◽  
pp. 577-580 ◽  
Author(s):  
H. Szillat ◽  
Hk. Müller-Buschbaum
Keyword(s):  
Crystal Structure ◽  
Rare Earth ◽  
Single Crystals ◽  
Alkaline Earth ◽  
Three Dimensional ◽  
Space Group ◽  
X Ray ◽  
Ray Methods

Single crystals of (Cu0.22Mg0.78)BaNd2Mo4O16 have been prepared by crystallization from melts and investigated by X-ray methods. The compound crystallizes monoclinically, space group C62h - C12/c1, Z = 4, a = 5.351(1), b = 12.891(2), c = 19.391(4) Å,β = 90.899(14)° and is isotypic to CuKHo2Mo4O16. The crystal structure is dominated by BaO10 and NdO8 polyhedra forming a three-dimensional polyhedra network, which is filled by axially distorted (Cu,Mg)O6 octahedra and MoO4 tetrahedra.

Real-time microstructure of shock-compressed single crystals from X-ray diffraction line profiles

2011 ◽  
Vol 44 (3) ◽  
pp. 574-584 ◽  
Author(s):  
Stefan J. Turneaure ◽  
Y. M. Gupta
Keyword(s):  
Single Crystals ◽  
Real Time ◽  
Line Profile ◽  
Distribution Model ◽  
Line Profiles ◽  
X Ray Diffraction ◽  
Multiple Diffraction ◽  
Heterogeneous Distribution ◽  
X Ray ◽  
Experimental Geometry

Methods to obtain and analyze high-resolution real-time X-ray diffraction (XRD) measurements from shock-compressed single crystals are presented. Procedures for extracting microstructural information – the focus of this work – from XRD line profiles are described. To obtain quantitative results, careful consideration of the experimental geometry is needed, including the single-crystal nature of the sample and the removal of instrumental broadening. These issues are discussed in detail. Williamson–Hall (WH) and profile synthesis (PS) analysis procedures are presented. More accurate than WH, the PS procedure relies on a forward calculation in which a line profile is synthesized by convoluting the instrumental line profile with a line profile determined from a diffraction simulation. The diffraction simulation uses the actual experimental geometry and a model microstructure for the shocked crystal. The shocked-crystal microstructural parameters were determined by optimizing the match between the synthesized and measured line profiles. XRD measurements on an Al crystal, shocked along [100] to 7.1 GPa using plate-impact loading, are used to demonstrate the WH and PS analysis methods. In the present analysis, the microstructural line broadening arises because of a distribution of longitudinal elastic microstrains. The WH analysis resulted in FWHM longitudinal microstrain distributions of 0.22 and 0.38% for Lorentzian and Gaussian line shape assumptions, respectively. The optimal FWHM longitudinal microstrain for the PS method was 0.35% with a pseudo-Voigt distribution (40% Lorentzian–60% Gaussian). The line profile measurements and PS analysis presented in this work provide new insight into the heterogeneous distribution of elastic strains in crystals undergoing elastic–plastic deformation during shock compression. Such microstrain distribution measurements are complementary to continuum measurements, which represent averages of the heterogeneous strains or stresses. The PS analysis is a general method capable of incorporating microstructural models more complex than the microstrain distribution model used in this work. As a next step, the PS method will be applied to line profiles of multiple diffraction peaks to separate strain- and size-broadening effects in shocked crystals.

Ein Beitrag zur Chemie von Verbindungen des Bautyps MxPd3O4 / A Contribution to the Chemistry of the Compounds MxPd3O4

1979 ◽  
Vol 34 (12) ◽  
pp. 1661-1662 ◽  
Author(s):  
H.-J. Meyer ◽  
Hk. Müller-Buschbaum
Keyword(s):  
Single Crystals ◽  
Type Structure ◽  
Space Group ◽  
X Ray ◽  
Structure Space ◽  
Ray Methods

Single crystals of a new compound Pd0.5Pd3O4 were prepared and investigated by X-ray methods. It crystallizes with NaxPt3O4-type structure (space group Oh3-Pm3n, a = 575.6 pm). The distribution of the oxydation states of Pd with respect to the lattice positions is discussed.

scholarly journals Notizen: Die Kristallstruktur von (PPh4)2[Sn(N3)6] / The Crystal Structure of (PPh4)2[Sn(N3)6]

1983 ◽  
Vol 38 (10) ◽  
pp. 1301-1303 ◽  
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Space Group ◽  
X Ray ◽  
Covalently Bonded ◽  
Ray Methods

Single crystals of (P(C6H5)4)2[Sn(N3)6] were prepared by the reaction of SnCl2 with AgN3 or NaN3 in a CH2Cl2 suspension in the presence of PPh4Cl. The crystal structure was solved with X-ray methods (space group P1̅, Z = 1, a = 1021, b = 1064, c = 1247 pm, α = 88.1°, β = 74.9°, γ = 68.6°, 3691 independent reflexions, R = 0.039). The structure consists of PPh4⊕ cations and anions [Sn(N3)6]2⊖. The symmetry of the hexazidostannate is Ci, the N3-groups are covalently bonded to the Sn-centre with ∢SnNN between 119 and 126°.

Ein Silber- Kupfer - Oxovanadato-Oxomolybdat mit Silber in quadratisch-planarer Koordination: Ag0,5Cu3V0,5Mo2,5O12 / On a Silver Copper Oxovanadate-Oxomolybdate with Silver in Square Planar Coordination: Ag0,5Cu3V0,5Mo2,5O12

1995 ◽  
Vol 50 (6) ◽  
pp. 879-883 ◽  
Author(s):  
H. Szillat ◽  
Hk. Müller-Buschbaum
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Statistical Distribution ◽  
Space Group ◽  
X Ray ◽  
Point Position ◽  
Square Planar ◽  
Symmetry Space ◽  
Ray Methods ◽  
Symmetry Space Group

Single crystals of Ag0.5Cu3V0,5Mo2,5O12 have been prepared by crystallization from melts and investigated by X -ray methods. They crystallize with triclinic symmetry, space group Ci1 -P 1̄ , a = 6.797(6), b = 8.575(6), c = 9.897(7) Å, α = 103.47(6), β = 103.69(6), γ = 101.48(6)° and Z = 4. The crystal structure is characterized by chains of edge-sharing CuO6 octahedra and CuO5 pyramids. Special features of this com pound are the square planar surrounding of Ag+ by O2− and a statistical distribution of molybdenum and vanadium at one point position.

scholarly journals Effect of Instrumental Correction on X-ray Line Profile Analysis in Cold Rolled Ferritic Steel

2018 ◽  
Vol 58 (6) ◽  
pp. 1181-1183 ◽  
Author(s):  
Setsuo Takaki ◽  
Takuro Masumura ◽  
Fulin Jiang ◽  
Toshihiro Tsuchiyama
Keyword(s):  
Line Profile ◽  
Ferritic Steel ◽  
Profile Analysis ◽  
Line Profile Analysis ◽  
X Ray ◽  
Cold Rolled

Silberdiammin-disilber-hexacyanometallate(III): Kantenverknüpfte Doppeltetraeder-Einheiten Ag2N6 in den unterschiedlichen Strukturen von Eisen- und Cobaltkomplex / Silverdiammine Disilver Hexacyanometallates(III): Edge-Sharing Tetrahedra Ag2N6 in the Different Structures of Iron and Cobalt Complex

1988 ◽  
Vol 43 (12) ◽  
pp. 1589-1597 ◽  
Author(s):  
B. Ziegler ◽  
K. Seitz ◽  
D. Babel
Keyword(s):  
Single Crystals ◽  
Crystal Structures ◽  
Dihedral Angle ◽  
Cobalt Complex ◽  
Iron Complex ◽  
Space Group ◽  
X Ray ◽  
R Factors ◽  
Ray Methods

Abstract The crystal structures of the monoclinic compounds Ag(NH3)2Ag2Fe(CN)6 (a = 948.2, b = 1235.5, c = 1246.8 pm, β = 94.98°. Z = 4. space group Cc) and Ag(NH3)2Ag2Co(CN)6 (a = 772.1, b = 1347.9, c = 1405.2 pm, β = 101.25°, Z = 4, C2/c) have been determined by x-ray methods from single crystals. Using 1947 and 2739 reflections, resp.. R factors of about 5% were reached. Both compounds are similar in containing approximately linear Ag(NH3)2+ dumb-bells (Ag-N = 216 pm) and dimeric Ag2N6 units. The latter consist of distorted edge-sharing tetrahedra (average Ag-N = 229 and 231 pm, resp.), the cavities of which are provided by the nitrogen ends of six surrounding M(CN)63- octahedra (Fe -C =195 pm, Co -C = 189 pm, C - N = 115 and 114 pm, resp.). In the iron complex, which is elpasolite-related, the central Ag2N2 ring is planar (Ag-Ag = 327.0 pm). By contrast the unit is folded (Ag-Ag = 307.8 pm, dihedral angle 126° between AgN2 triangles) in the cobalt complex, which has a different structure as discussed in detail

Über Oxocuprate, XXII Zur Kristallchemie von Kupferoxichlorid: Cu2OCl2 / On Oxocuprates, XXII The Crystal Structure of Cu2OCl2

1977 ◽  
Vol 32 (4) ◽  
pp. 380-382 ◽  
Author(s):  
R. Arpe ◽  
Ηk Müller-Buschbaum
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Orthorhombic Space Group ◽  
X Ray ◽  
Distorted Octahedral Coordination ◽  
Distorted Octahedral ◽  
Jahn Teller ◽  
Jahn Teller Effect ◽  
Group D ◽  
Ray Methods

Single crystals of Cu2OCl2 were prepared and investigated by X-ray methods. Cu2OCl2 crystallizes orthorhombic, space group D2h24-Fddd (α = 969.9, b = 960.3, c = 746.2 pm). Cu2+ has a distorted octahedral coordination. The JAHN-TELLER-Effect and effective coordination number are discussed.

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