24小时热门版块排行榜    

查看: 580  |  回复: 3
当前只显示满足指定条件的回帖,点击这里查看本话题的所有回帖

Dream-ag

金虫 (小有名气)

[求助] Microwave-assisted synthesis and optical property of CdMoO4

可以请哪位专业人士帮我翻译下这一段吗?感觉专业词汇很多诶
In lattice space, scheelite compounds (CaMoO4,CaWO4,SrMoO4,SrWO4, etc.) correspond to S4 symmetry. A group theoretical analysis of the scheelite structure yields 26 lattice modes at theG point of the Brillouin zone—3Ag+5Au+5Bg+3Bu
+5Eg+5Eu. The 13 g modes are Raman active, and the 13 u modes are infrared active(4Au and 4Eu), acoustic (1Au and 1Eu), and silent (3Bu). The Raman
active phonon modes can be classified into two types of vibrations,the internal and external modes (rotation and translation) with respect to (w.r.t.) the [MoO4]2 -tetrahedrons. Among them, seven modes are internal stretching vibrations of n1(Ag), n3(Bg), and n3(Eg),and bending of n2(Ag), n2(Bg), n4(Bg), and n4(Eg). The six remaining are external modes—three rotations, two translations, and an unidentified mode. The internal modes correspond to normal vibrations of the [MoO4]2- tetrahedrons, while the external modes involve motions of the metallic atoms (e.g. Ca, Sr, Ba, Cd, etc.) w.r.t.[MoO4]2-tetrahedrons [10–12,15,18–20]. It is expected that the frequencies and wavenumbers of the internal stretching modes are higher than those of the external ones, because the internal covalent
bonding within the [MoO4]2- tetrahedrons is stronger than the
external lattice binding. Fig. 3a shows the Raman spectra of CdMoO4
produced by the microwave radiation method under different
conditions. They show strong Raman peaks that indicate a strong
interaction between the ions, which mainly arise from the stretching
and bending vibrations of the shorter metal–oxygen bonds within
the anionic groups. All Raman spectra were identified as n1(Ag),n3(Bg), n3(Eg), n4(Eg,Bg), and n2(Ag,Bg) at 862, 820, 755, 396, and 309 cm-1
, respectively. Three rotation and two translation modes of [MoO4]2- units were detected at 280, 192, 153, 135, and 102 cm-1,respectively. These results are in accordance with those reported in the literature, although their wavenumber vibra-tion modes were not exactly the same values, due to the difference in geometries, particle sizes, and nature of the products

» 猜你喜欢

我是来学习的,哈哈
已阅   关注TA 给TA发消息 送TA红花 TA的回帖

zsqy0329

金虫 (小有名气)

太多了,只有靠自己

[ 发自手机版 https://muchong.com/3g ]
4楼2013-10-16 00:22:09
已阅   关注TA 给TA发消息 送TA红花 TA的回帖
查看全部 4 个回答

qfzcom

铁杆木虫 (著名写手)

【答案】应助回帖

你感觉多,我们感觉更多
2楼2013-10-15 17:55:14
已阅   关注TA 给TA发消息 送TA红花 TA的回帖

Dream-ag

金虫 (小有名气)

引用回帖:
2楼: Originally posted by qfzcom at 2013-10-15 17:55:14
你感觉多,我们感觉更多

没学什么结构的知识
我是来学习的,哈哈
3楼2013-10-15 18:42:07
已阅   关注TA 给TA发消息 送TA红花 TA的回帖
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[考研] 311求调剂 +6 冬十三 2026-03-18 6/300 2026-03-22 20:18 by edmund7
[考研] 材料与化工085600,总分304,本科有两篇sci参与,求调剂 +4 幸运的酱酱 2026-03-22 5/250 2026-03-22 20:15 by edmund7
[考研] 寻找调剂 +4 倔强芒? 2026-03-21 4/200 2026-03-22 16:14 by 木托莫露露
[考研] 一志愿北京化工大学070300 学硕336求调剂 +5 vv迷 2026-03-21 8/400 2026-03-22 14:20 by ColorlessPI
[考研] 一志愿070300浙大化学358分,求调剂! +3 酥酥鱼.. 2026-03-21 3/150 2026-03-22 11:31 by 杨杨杨紫
[考研] 311求调剂 +3 勇敢的小吴 2026-03-20 3/150 2026-03-21 17:40 by ColorlessPI
[考研] 313求调剂 +4 肆叁贰壹22 2026-03-19 4/200 2026-03-21 17:33 by ColorlessPI
[基金申请] 学校已经提交到NSFC,还能修改吗? 40+4 babangida 2026-03-19 9/450 2026-03-21 16:12 by babangida
[考研] 求调剂 +3 白QF 2026-03-21 3/150 2026-03-21 13:12 by zhukairuo
[考研] 一志愿重庆大学085700资源与环境专硕,总分308求调剂 +3 墨墨漠 2026-03-18 3/150 2026-03-21 00:39 by JourneyLucky
[考研] 274求调剂 +10 S.H1 2026-03-18 10/500 2026-03-20 23:51 by JourneyLucky
[考研] 一志愿南京理工大学085701资源与环境302分求调剂 +4 葵梓卫队 2026-03-18 6/300 2026-03-20 23:02 by JourneyLucky
[考研] 290求调剂 +7 ^O^乜 2026-03-19 7/350 2026-03-20 21:43 by JourneyLucky
[考研] 工科材料085601 279求调剂 +7 困于星晨 2026-03-17 9/450 2026-03-20 17:38 by 无懈可击111
[考研] 求调剂 +3 暗涌afhb 2026-03-16 3/150 2026-03-20 00:28 by 河南大学校友
[考研] 材料学硕318求调剂 +5 February_Feb 2026-03-19 5/250 2026-03-19 23:51 by 23Postgrad
[考研] 085601材料工程专硕求调剂 +10 慕寒mio 2026-03-16 10/500 2026-03-19 15:26 by 丁丁*
[考研] 材料工程专硕调剂 +5 204818@lcx 2026-03-17 6/300 2026-03-18 22:55 by 204818@lcx
[考博] 26博士申请 +3 1042136743 2026-03-17 3/150 2026-03-17 23:30 by 轻松不少随
[考研] 考研调剂 +3 淇ya_~ 2026-03-17 5/250 2026-03-17 09:25 by Winj1e
信息提示
请填处理意见