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单体钨与脉石自动分选 被引量:2
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作者 谢勤贤 《有色金属(选矿部分)》 CAS 北大核心 1995年第3期13-15,共3页
介绍利用钨矿石的导磁特性及色度差异对单体钨及脉石进行预选以提高品位的方法,重点介绍磁电选。该方法对实现预选自动化,改善劳动生产条件,提高生产率有效,是一条可行的途径。
关键词 单体钨 磁电选 脉石 分选 自动化
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Syntheses of Two Chiral Clusters [η~5-C_5H_4C(NR)CH_3]- RuNiM(CO)_5(μ_3-S) (R =NH-C_6H_3-2,4-(NO_2)_2,M=Mo,3;M=W,4) and the Single-crystal Structure of Cluster 3
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作者 边治国 陈玉岗 +1 位作者 殷元骐 李庆山 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2003年第3期301-304,共4页
The new chiral clusters [h5-C5H4C(NR)CH3]RuNiM(CO)5(m3-S) (R = NH-C6H3-2,4- (NO2)2, M = Mo, 3; M = W, 4) were synthesized and the structure of cluster 3 was determined by single-crystal X-ray analysis. Crystal data: C... The new chiral clusters [h5-C5H4C(NR)CH3]RuNiM(CO)5(m3-S) (R = NH-C6H3-2,4- (NO2)2, M = Mo, 3; M = W, 4) were synthesized and the structure of cluster 3 was determined by single-crystal X-ray analysis. Crystal data: C23H16O9N4MoNiRuS, Mr = 780.18, orthorhombic, space group Pbca with the following crystallographic parameters: a = 13.207(4), b = 16.036(5), c = 25.513(8) , Z = 8, V = 5403(3) 3, Dc = 1.918 g/cm3, m = 1.834 mm-1 and F(000) = 3072. The final R = 0.0512 and wR = 0.1132 for 2525 reflections with I > 2.00s(I). 展开更多
关键词 synthesis CHIRAL CLUSTER crystal structure
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