【摘 要】
：
As part of our systematic research on the acentric rare earth chalcogenides,the ErAIGeS_5/KBr,Er_3AgGeS_7/KBr and Er_6Ge_3S_(14)/KBr systems were investigated a
【机 构】
：
State Key Laboratory of Structural Chemistry
【基金项目】
：
the NSFC;the NSF of Fujian Province;中国科学院自然科学基金;the 973 Program
论文部分内容阅读
As part of our systematic research on the acentric rare earth chalcogenides,the ErAIGeS_5/KBr,Er_3AgGeS_7/KBr and Er_6Ge_3S_(14)/KBr systems were investigated and three compounds belonging to the R_6B_2C_2Q_(14)(R=rare earth,B=6-coordinated element,C=4-coordinated element,Q=S and Se) family were identified. These compounds crystallize in the P63 space group,and the crystal data are as follows: Er_3Ge_(1/4)GeS_7,α=9.6480(14),c=5.7920(12)(A),Z=2; Er_3Ge_(0.382(8))GeS_7,α=9.6360(14),c=5.8460(12)(A),Z=2; Er_3Ge_(1/2)GeS_7,α= 9.6061(13),c= 5.8346(18)(A),Z=2.Single-crystal analysis indicated that the Er_3Ge_xGeS_7(x=1/4,0.382(8),1/2) structures consist of three types of building blocks: ErS_7,GeS_4 and GeS_6 units. Er_3M_xGeS_7 are deficient compounds with the B sites occupied partly by Ge(Ⅳ) and/or Ge(Ⅱ).
其他文献
目的 探讨半边旗5F对系统性硬皮病成纤维细胞半胱氨酸天冬氨酸蛋白酶3(caspase3)活性及其酶原活化的影响,进而了解该酶诱导系统性硬发病患者皮肤成纤维细胞凋亡的机制.方法
左氨氯地平片是治疗高血压的一线药,具有副作用少、生物利用度高、患者依从性好等优点[1].临床常见不良反应为头痛、水肿、乏力、腹痛、面红、心悸等[2].我院发现9例因使用该
人体组织中有四种不同的丙酮酸激酶同工酶表达,其中肿瘤特异性M2型丙酮酸激酶(pyruvate kinase type M2,M2-PK)在早期胚胎组织中表达并在肿瘤细胞的增殖过程中再次表达。肿瘤
目的:探讨紫苏叶注射液对犬动脉搭桥术后血液流变学参数的影响.方法:将20只试验犬随机分为高、中、低剂量组(1 434 mg/kg,478 mg/kg,159 mg/kg)及对照组,采用同侧自体颈外静
Novel pyrimidine nucleoside-3,5-dicyanopyridine hybrids (4) or pyridine attached acylureas (5) were selectively and efficiently prepared from the reaction of 2-
Bacterium Providencia rettgeri YL was found to exhibit an unusual ability to heterotrophically nitrify and aerobically denitrify various concentrations of ammon
A novel one-dimensional chain copper(Ⅱ) coordination polymer {[Cu(2,2-bipy)(HPDA)](HPDA)(H_2O)}_n has been hydrothermally synthesized using pimelic acid,2,2-bi
Multi-walled carbon nanotube multilayers were modified onto a newly proposed gold hair microelectrode via a simple layer-by-layer assembling method. The resulti
Ce-doped lithium niobate (LiNbO_3) single crystals were grown from the melts with various Li/Nb molar ratios (0.750,0.850,0.946,1.100,1.250 and 1.380) by Czochr
The excited-state intramolecular hydrogen abstraction reactions of butanal have been investigated using the CAS-MP2/6-311+G*//CASSCF/6-31G* methods. Calculated