Crystal structure of lutetium disilicate, Lu2Si2O7

Lu2O7Si2, monoclinic, C12/m1 (No. 12), a 6.762(2) Angstrom, b = 8.835(3) Angstrom, c = 4.711(2) Angstrom, beta = 101.99(4)degrees, V = 275.3 Angstrom(3), Z = 2, R-gt(F) = 0.019, wR(ref)(F-2) = 0.045, T = 293 K

Darstellung und Kristallstruktur von Nd2SeSiO4

Nd2SeSiO4 has been prepared as violet rod-like single crystals by reaction of elemental neodymium, selenium and iodine in the ratio 1.0:1.0:2.5 and subsequent reaction with quartz glass powder. The compound crystallizes in the orthorhombic space group Pbcm with a = 618.2(2), b = 717.4(2), c = 1102.4(2) pm and Z = 4. The structure is built up of alternating NdSe- and NdSiO4-sheets

Darstellung und Struktur von (CH3NH3)3PrCl6. 2 H20

(CH3NH3)3PrCl6 · 2 H2O has been prepared as light green, air sensitive crystals by the reaction of PrCl3·xH2O with [CH3NH3]Cl in ethanol. The compound was characterized by crystal structure determination. Crystal data: monoclinic space group I 2/a, Z = 8. Lattice constants: a = 1963.3(4), b = 925.9(3), c = 1954.3(4) pm, β = 90.56(1)°. The compound forms [PrCl4(H2O)2]--chains where two Pr3+-ions are connected via two chlorine atoms. The magnetic behaviour of (CH3NH3)3PrCl6· 2H2O has been studied

Zur Polymorphie von TbCl3

3 different modifications of TbCl3 were synthesized. TbCl3 (UCl3type). probably in a metastable state, crystallizes in space group P63/m with a = 737.63(2) pm, c = 405.71(2) pm and Z = 2. TbCl3(PuBr3-type) crystallizes in space group Cmcm with a = 384.71(6) pm, b = 1177.37(7) pm, c = 851.77(4) pm and Z = 4. h-TbCl3, the high temperature phase being stable above 790 K, crystallizes in space group P42/mnm with a = 642.51(4) pm, c = 1177.14(18) pm and Z = 4. © 1988, Walter de Gruyter. All rights reserved

Darstellung und Kristallstruktur von NdSe1.9

NdSe1,9 has been prepared as grey, strongly reflecting platelets by reaction of elemental neodymium with selenium in the ratio 1 :2 and subsequent chemical vapour phase transport with iodine. It crystallizes in the tetragonal space group P42/n with a = 925.36(7), c = 1679.2(3) pm and Z = 20. The structure determination results in a formulation of NdSe1,9 as Nd 20(Se(I)2)8Se(I)2⃞2Se(II)20, where the defect layer built from the Se(I)22- and Se(I)2- ions corresponds to the F layer in the PbFCl substructure

Effects of Exercise Intensity on Post-Exercise Oral Glucose Tolerance Test Response

Please refer to the pdf version of the abstract located adjacent to the title

Диагностика релятивистских электронных пучков по угловому распределению когерентного дифракционного излучения

Современные лазерно-плазменные ускорители позволяют получать и ускорять электронные сгустки субпикосекундной длительности, для которых отсутствуют средства диагностики требуемой точности. Распространенный метод измерения длительности электронных сгустков основан на использовании стрик – камеры, точность которого не превышает 1 мм. Использование метода, основанного на спектрально-угловых измерения когерентного переходного излучения, позволяет улучшить точность. Использование КДИ для этой цели обеспечивает неинвазивный характер диагностики. В ходе выполнения ВКР были исследованы возможности использования когерентного дифракционного излучения (КДИ) от щелевой мишени со смещением для измерения длины электронного сгустка.Modern laser-plasma accelerators make it possible to obtain and accelerate electron bunches of subpicosecond duration, for which there are no diagnostic tools of the required accuracy. A common method for measuring the duration of electron bunches is based on the use of a streak camera, the accuracy of which does not exceed 1 mm. The use of a method based on spectral-angular measurements of coherent transition radiation makes it possible to improve the accuracy. The use of CDR for this purpose provides a non-invasive diagnostic character. In the course of graduation project , the possibilities of using coherent diffraction radiation (CDR) from an offset slit target to measure the length of an electron bunch were investigated