Structure du dichromate de cadmium–potassium dihydraté: CdK2(Cr2O7)2.2H2Otext/htmlcharset=iso-8859-15First page of articledoi:10.1107/S0567740879006713Durif, AAverbuchPouchot, M.TIUCrInternational Union of CrystallographyActa Crystallographica
Reactions in the chrysenequinone–phenylacetylene–phosphorus trichloride system: formation and crystal structure of 2,7-dichloro-2-oxo-4-phenylbenzo[o]-1,... The reaction of chrysenequinone with phenylacetylene in the presence of phosphorus trichloride leads to the formation of a new phosphorus ...
§4.1炔烃alkynes一、炔烃的结构structureofalkynes1、炔烃：分子中含有一个碳碳三键的不饱和开链烃；通式为：CnH2n-2。2、碳碳三键的形成：碳碳三键中为SP杂化：2Py激发2Px2Pz2S2S 2Py杂化2Px2PzSP 2Py 2Pz SP杂化轨道中，有1/2的S成分，键长为0.120nm。杂化轨道间的夹角是1800，呈直线型。未杂化的2...
The crystal structures of SrNiP2O7 (I) and SrNi3(P2O7)2 (II) have been refined from single crystal data [(I): P21/n, Z=4, a=5.2630(16), b=8.2605(10), c=12.6018(15) Å, β=90.224(19)°, 101 parameters, 1143 independent reflections, R/wR2=0.029/0.070; (II): P21/c,...
Crystal structure of [mu-11,23-dimethyl-3,7,15,19-tetraazatricyclo[19.3.1.1(9,13)]-3,7,15,19- tetracyanomethyltetracosa-1(24),-9(25),10,12,21,23-hexaene-25,26-diolato -kappa N-8(3),N-7,O-25,O-26:N-15,N-19,O-25,O-26]-bis[(acetato-kappa O-2,O ')cadmium(II)]...
8.7.2 CrPt3 In this structure, both the Cr and the Pt atoms carry magnetic moments that point in opposite directions. Because they are of different magnitudes, such a magnetic material is classified as a ferrimagnet. The crystal structure can be described in space group Pm3¯m(Oh1) with...
The potential-energy surface of the triatomic cation [Cr,O2]+ has been examined by means of ion-cyclotron resonance and sector-field mass spectrometry as well as high-level theoretical methods. Chromium(V) dioxide cation OCrO+ can be generated by electron ionization of CrO2Cl2 and exhibits a...
The aim of this paper is to present a novel negative temperature coefficient (NTC) thermistor based on A2Zr2O7 (A = Nd, Sm, Gd, Yb) zirconate c
Medium- and high-entropy alloys (M/HEAs) mix several principal elements with near-equiatomic composition and represent a model-shift strategy for designing previously unknown materials in metallurgy1,2,3,4,5,6,7,8, catalysis9,10,11,12,13,14 and other fields15,16,17,18. One of the core...
Nanofibrils play a pivotal role in spider silk and are responsible for many of the impressive properties of this unique natural material. However, little is known about the internal structure of these protein fibrils. We carry out polarized Raman and polarized Fourier-transform infrared spectroscopies...