cubic表晶体属立方晶系, Fm-3m为空间群符号, 表明其晶体为立方晶系, 点阵形式为立方面心, 点群为Oh, 在其3个位方向上(a,a+b+c, a+b)上的对称元素分别为 4/m -3 2/m.常见晶体中NaCl, Cu Ag Au CaF2都属该空间群.
Utilizing X-ray diffraction (XRD) patterns and detailed Rietveld refinement analysis at various temperatures revealed that SrLaMgTaO6ceramics possess a cubic structure, specifically within the Fm-3m (225) space group. The structure of ceramic particles was further studied by scanning electron microscopy...
英文: Sr2YRuO6 is found to be of a cubic lattice cell with a=b=c=0.816 4 nm,where Y and Ru ions occupy the B site of double perovskite cell oderly. 中文: X射线的实验结果表明:样品均形成了在a-b方向上具有双倍周期的钙钛矿结构,属于立方晶系,晶体空间群为Fm3m(No225). Sr2YRuO6原胞为...
The two mono-pnictides compounds of thorium, i.e., ThSb and ThBi are modeled in the space group Fm 3m (225) with fcc crystal symmetry (Fig. 1). Atomic-positions configuration of the species in the compounds are similar to NaCl-type structure as follows: Th (0,0,0) and Sb/Bi (...
According to the results of electron diffraction reported in the literature this carbon allotrope has a space group Fm \(\bar{3}\) m (group number 225) with a lattice parameter of about 3.54–3.57 Å. Nevertheless, because of the closeness of its lattice parameter to that of diamond...
-1 .0 GO TO 3 9 ALL W E I G H T S = l r 4 4 1 LOOK AT EACH P O I N T AND WEIGHT THEM I F YOU WANT T O A 215 A 216 A 217 A 218 A 219 A 220 A 221 A 222 A 223 A 224 A 225 A 226 A 227 A 228 A 229 3 6 CALL PLPT (X.YY.NOI XRAY ( 2 J = X ...
www.nature.com/scientificreports OPEN received: 13 May 2016 accepted: 23 June 2016 Published: 25 July 2016 Controllable Phase Transformation and Mid-infrared Emission from Er3+-Doped Hexagonal-/Cubic- NaYF4 Nanocrystals Dandan Yang1, Dongdan Chen1, Huilin He1, Qiwen Pan1, Quanlan ...
Rietveld refinement results verified that the compounds were crystallized in cubic structure with space group Fm-3m (225). The PL emission, CIE and CCT analysis confirm that, the present photocatalyst can serve as an excellent candidate for cool LEDs. The registered trend (Omega(2) < Omega(4)...
The ultrafast sintering of powders containing Cr and V impurities results in a peculiar cubic WC quaternary phase (W0.87Cr0.12V0.09)C0.71 which retains the crystalline structure, Fm3m225documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} ...
Thecomposition was determined as Hg2Re0.5Ba4Ca1.5O8.5 and an univocal interpretation was found in terms of the high-symmetry space groupFm3m(225), with Z=2, (= 6.70 g/cm3; the reliability factor was 5.0%. This phase, Cu-free and not superconductive, rather than aprecursor can be ...