Erbium doping into lithium niobate and sapphire single crystal wafers

2001 ◽  
Vol 16 (2) ◽  
pp. 333-335 ◽  
Author(s):  
P. Nekvindova ◽  
J. Spirkova-Hradilova ◽  
J. Schröfel ◽  
V. Perina
Keyword(s):  
Crystal Structure ◽  
Lithium Niobate ◽  
Single Crystal ◽  
Crystallographic Orientation ◽  
Moderate Temperature ◽  
Strong Anisotropy ◽  
Erbium Doping ◽  
Crucial Point ◽  
Sapphire Single Crystal ◽  
First Time

The possibility of localized doping by Er3+ diffusion at moderate (less than 500 °C) temperature was for the first time demonstrated for sapphire single crystal wafers. The doping was achieved by immersing the substrate wafers into reaction melt containing small amounts of erbium salt. The crucial point of the presented technology was a crystallographic orientation of the used wafers. The most suitable orientation of the cuts was the “X-cut” with orientation (11–20). The strong anisotropy of the moderate temperature Er3+ doping into lithium niobate and sapphire was explained on the basis of the crystal structure of particular cuts.

O,O-diethyl O-[2-(dimethylamino)ethyl] phosphorothioate: structural evidence of the decomposition product and its oxalate salt

2019 ◽  
Vol 234 (9) ◽  
pp. 613-621
Author(s):  
Marc André Althoff ◽  
Jörn Frederik Martens ◽  
Marco Reichel ◽  
Manfred Metzulat ◽  
Thomas Matthias Klapötke ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Title Compound ◽  
Analytical Methods ◽  
Decomposition Product ◽  
X Ray Diffraction ◽  
X Ray ◽  
Rearrangement Process ◽  
Study Support ◽  
First Time

Abstract The molecular and single crystal structure of O,O-diethyl O-[2-(dimethylamino)ethyl] phosphorothioate oxalate, as determined by single crystal X-ray diffraction studies, is described for the first time; although this compound is well-known by industry and research from the mid-20th century. The known decomposition product of pure O,O-diethyl O-[2-(dimethylamino)ethyl] phosphorothioate could also be structurally characterized. Additionally, the compounds are characterized by recent analytical methods e.g. NMR. The findings of our study support the thesis that the isolated decomposition product must be a by-product of the thiono-thiolo rearrangement process of the title compound.

X-Ray and Raman Investigations on Cyanides ofMono- and DivalentMetals and Synthesis, Crystal Structure and Raman Spectrum of Tl5(CO3)2(CN)

2002 ◽  
Vol 57 (8) ◽  
pp. 895-900 ◽  
Author(s):  
Olaf Reckeweg ◽  
Arndt Simon
Keyword(s):  
Crystal Structure ◽  
Raman Spectroscopy ◽  
Raman Spectrum ◽  
Single Crystal ◽  
Aqueous Ammonia ◽  
Ammonia Solution ◽  
Aqueous Ammonia Solution ◽  
Divalent Metals ◽  
X Ray ◽  
First Time

Pseudobinary cyanides of monovalent and divalent metals were synthesized, and X-ray and Raman data of the cyanides were measured. Single crystal X-ray structure analyses were performed on Zn(CN)2 (Pn3̄m (No. 224), a = 591.32(7) pm), Hg(CN)2 (I4̄2d (No. 122), a = 969.22(14) and c = 890,15(18) pm) and for the first time on AgCN (I4̄2d (No. 166), a = 600.58(8) and c = 526.28(11) pm). The data are compared with literature data. The reaction of TlF and NaCN in 25% aqueous ammonia solution in air led to Tl5(CO3)2(CN) which was characterized by X-ray (Cmca (No. 64), 1468.1(3), 1171.6(2) and 1266.0(3) pm) and Raman spectroscopy.

scholarly journals Ba2ZnGe2S6O: Ein neues Oxidsulfid mit Tetraedergerüststruktur/On Ba2ZnGe2S6O. A New Oxide Sulfide with Tetrahedral Framework Structure

1980 ◽  
Vol 35 (6) ◽  
pp. 672-675 ◽  
Author(s):  
Chr. L. Teske
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Coordination Sphere ◽  
Framework Structure ◽  
Tetrahedral Framework ◽  
Space Group ◽  
X Ray ◽  
Lattice Constants ◽  
First Time ◽  
Ray Methods

Abstract Ba2ZnGe2S6O was prepared for the first time and the crystal structure determined by using single crystal X-ray methods. The space group is D32d-P4̄21m, tetragonal (No. 113). Lattice constants: a = 963.59 ± 0.22; c = 645.06 ± 0.25 pm. The tetrahedral framework structure is described and discussed. Zn is linked only to sulfur. The oxygen belongs to the coordination sphere of Ge and Ba.

Structure of fluorite-like compound based on Nd5Mo3O16with lead partly substituting for neodymium

2015 ◽  
Vol 71 (2) ◽  
pp. 186-193 ◽  
Author(s):  
Alexander M. Antipin ◽  
Natalia I. Sorokina ◽  
Olga A. Alekseeva ◽  
Alexandra N. Kuskova ◽  
Elena P. Kharitonova ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Resolution ◽  
Single Crystal ◽  
Experimental Verification ◽  
X Ray Diffraction ◽  
Transmission Microscopy ◽  
X Ray ◽  
Oxygen Ion ◽  
First Time ◽  
Edx Microanalysis

A single crystal of Nd5Mo3O16with lead partly substituting for neodymium, which has a fluorite-like structure, was studied by precision X-ray diffraction, high-resolution transmission microscopy and EDX microanalysis. The crystal structure is determined in the space group Pn\bar 3n. It was found that the Pb atoms substitute in part for Nd atoms in the structure and are located in the vicinity of Nd2 positions. Partial substitutions of Mo cations for Nd positions and of Nd for Mo positions in crystals of theLn5Mo3O16oxide family are corroborated by X-ray diffraction for the first time. The first experimental verification of the location of an additional oxygen ion in the voids abutting MoO4tetrahedra was obtained.

scholarly journals Raman Spectroscopy and Single-Crystal High-Temperature Investigations of Bentorite, Ca6Cr2(SO4)3(OH)12·26H2O

Minerals ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 38
Author(s):  
Rafał Juroszek ◽  
Biljana Krüger ◽  
Irina Galuskina ◽  
Hannes Krüger ◽  
Martina Tribus ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Temperature ◽  
Single Crystal ◽  
Chemical Formula ◽  
Crystal Chemical Formula ◽  
Single Crystal Diffraction ◽  
Bending Vibrations ◽  
X Ray ◽  
First Time

The crystal structure of bentorite, ideally Ca6Cr2(SO4)3(OH)12·26H2O, a Cr3+ analogue of ettringite, is for the first time investigated using X-ray single crystal diffraction. Bentorite crystals of suitable quality were found in the Arad Stone Quarry within the pyrometamorphic rock of the Hatrurim Complex (Mottled Zone). The preliminary semi-quantitative data on the bentorite composition obtained by SEM-EDS show that the average Cr/(Cr + Al) ratio of this sample is >0.8. Bentorite crystallizes in space group P31c, with a = b = 11.1927(5) Å, c =21.7121(10) Å, V = 2355.60(18) Å3, and Z = 2. The crystal structure is refined, including the hydrogen atom positions, to an agreement index R1 = 3.88%. The bentorite crystal chemical formula is Ca6(Cr1.613Al0.387)Σ2[(SO4)2.750(CO3)0.499]Σ3.249(OH)11.502·~25.75H2O. The Raman spectra of bentorite from two different localities exhibit the presence of the main stretching and bending vibrations related to the sulfate group at 983 cm−1 (ν1), 1109 cm−1 (ν3), 442 cm−1 (ν2), and 601 cm−1 (ν4). Moreover, the presence of bands assigned to the symmetric Cr(OH)63− stretching mode and hydroxyl deformation vibrations of Cr–OH units at ~540 cm−1 and ~757 cm−1, respectively, may be used to distinguish between ettringite and bentorite. In situ high temperature single crystal XRD experiments show that the decomposition of bentorite starts at ca. 45 °C and that a dehydroxylation product similar to metaettringite is formed.

Highly emissive phenylene-expanded [5]radialene

2020 ◽  
Vol 56 (27) ◽  
pp. 3911-3914 ◽  
Author(s):  
Jie Yu ◽  
Chunlin Tang ◽  
Xinggui Gu ◽  
Xiaoyan Zheng ◽  
Zhen-Qiang Yu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Single Crystal Structure ◽  
One Pot ◽  
Ring Strain ◽  
The Fantastic ◽  
First Time

Star: a pentagonal conjugated radialene macrocycle was one-pot synthesized for the first time. The fantastic pentagonal architecture is revealed by its single crystal structure, and affords the smallest ring strain and the best conjugation.

Pigments of Fungi. XLVIII Clavorubin from Two Australasian Toadstools of the Genus Cortinarius and the X-Ray Crystal Structure of the Methyl Ester of 6-O-Methylclavorubin

1998 ◽  
Vol 51 (5) ◽  
pp. 347 ◽  
Author(s):  
Melvyn Gill ◽  
Malcolm S. Buchanan ◽  
Peter J. Steel ◽  
Nives M. Milanovic ◽  
Somphone Phonh-Axa
Keyword(s):  
Crystal Structure ◽  
Carboxylic Acid ◽  
Methyl Ester ◽  
Single Crystal ◽  
Natural Product ◽  
Structure Analysis ◽  
Claviceps Purpurea ◽  
Chemical Methods ◽  
X Ray ◽  
First Time

Clavorubin (1,5,6,8-tetrahydroxy-3-methyl-9,10-dioxoanthracene-2-carboxylic acid) (1), previously known only from the ascomycetious rye fungus Claviceps purpurea (‘ergot’), has been isolated from the fruit bodies of two Australasian basidiomycetes belonging to the genus Cortinarius and characterized by spectroscopic and chemical methods. A single-crystal X-ray structure analysis of the methyl ester (4) of 6-O-methylclavorubin establishes unequivocally, for the first time, the structure of the natural product.

Crystal structure of Bis(2,2':6',2''-terpyridyl)cobalt(III) chloride

1983 ◽  
Vol 36 (8) ◽  
pp. 1563 ◽  
Author(s):  
BN Figgis ◽  
ES Kucharski ◽  
AH White
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Least Squares ◽  
Title Compound ◽  
X Ray Diffraction ◽  
X Ray ◽  
First Time

The crystal structure of the title compound [CO(C15H11N3)2]Cl3 has been determined by single crystal X-ray diffraction methods at 295 K and refined by least-squares methods to a residual of 0.069 for 2953 'observed' reflections. Crystals are triclinic, PI, a 9.018(4), b 11.751(4), c 18.085(6)�, α 9O.82(6), β 9O.66(7), γ 90.79(7)�, Z 2. The determination establishes for the first time metal-nitrogen distances in the bis(terpyridyl)cobalt(III) species; (Co-N)(central, distal) are 1.86, 1.93 �. The precision of the determination is adversely affected by widespread solvent/anion disorder.

Darstellung und Kristallstruktur von Barium-Quecksilber-Thiostannat(IV), BaHgSnS4 / Preparation and Crystal Structure of Barium-Mercury-Thiostannate(IV), BaHgSnS4

1980 ◽  
Vol 35 (1) ◽  
pp. 7-11 ◽  
Author(s):  
Chr. L. Teske
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Two Dimensional ◽  
Space Group ◽  
X Ray ◽  
First Time ◽  
Ray Methods

Abstract BaHgSnS4 was prepared for the first time and the crystal structure determined by using single crystal X-ray methods, a = 1080,4, b = 1084,o, c = 661,3 pm. Space group: C102V-Pnn2 (No. 34) orthorhombic. There are pairs of edge-sharing tetrahedra linked together to form two-dimensional net works. The crystal structure is similar to that of BaCdSnS4 [1].

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