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【求助】金属间化合物的晶体结构的分析?
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文章投稿后审稿意见中有两天不知道怎么分析和回答,请教各位达人! (1)In Pearson's crystal data, the prototype of the new structure is mentioned as Co1.75Ge-type, not Mn2Ge-type. Is there a possibility that this is GaMnNi phase with BeZrSi-type which is an new ordered structure? (2)A corresponding XRD simulation pattern should be presented and compared with the experimental one. 其中第一点中:Pearson's crystal data指的是什么?XRD分析通过用JADE软件分析的结果是Mn2Ge,而对于Co1.75Ge和BeZrSi-type 我都没有分析出来. 第二点:simulation pattern 怎么用JADE去分析(不做精修的情况下) 是否有XRD以及晶体结构的达人能帮忙分析以及指导一下,如果有可能能否通过邮件之类的交流一下,因为我主要不是做这个的,所以不是很熟悉,小弟将不胜感激!(如果能帮上忙,+50BB) |
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xi2004
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2楼2009-02-17 22:25:23
3楼2009-02-17 22:35:43
xi2004
至尊木虫 (职业作家)
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waiy2001(金币+1,VIP+0):xie xie 2-19 12:53
waiy2001(金币+1,VIP+0):xie xie 2-19 12:53
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http://www.crystalimpact.com/pcd/Default.htm Pearson's Crystal Data is a crystallographic database, edited by Pierre Villars and Karin Cenzual. It is published by ASM International, Materials Park, Ohio, USA. The "PCD" (as it is typically abbreviated) contains crystal structures of a large variety of inorganic materials and compounds. The collaboration between ASM International and Material Phases Data System, Vitznau, Switzerland (MPDS), aims to create and maintain the world's largest critically evaluated "Non-organic database". 你的化合物是GaMnNi 相? 既然他指出是Co1.75Ge-type 或 BeZrSi-type ,我觉得他的意思是不是让你把这三个(包括Mn2Ge-type)的 由单晶结构模拟出来的PXRD与你的GaMnNi相的放一起比较一下. |

4楼2009-02-17 22:43:55
5楼2009-02-17 23:55:06
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我的理解是:我通过JADE软件分析,并得到其晶体结构: Crystal type Mn2Ge(hexagona)l Space group P63/mmc (No. 194) Lattice parameters a (nm) 0.41653 c (nm) 0.53010 Unit cell volume (nm3) 0.07965 Calculate density (g cm-3) 7.6082 Formula units per unit cell Z = 2 而审稿人通过这个结果,在Pearson's Crystal Data 中得到相应的结果是Co1.75Ge-type? |
6楼2009-02-17 23:58:48
xi2004
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7楼2009-02-18 00:08:58
xi2004
至尊木虫 (职业作家)
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★ ★
waiy2001(金币+2,VIP+0):热心人。。。。 2-19 12:54
waiy2001(金币+2,VIP+0):热心人。。。。 2-19 12:54
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*data for ICSD #52965 Coll Code 52965 Rec Date 2003/04/01 Chem Name Cobalt Germanide (1.75/1) Structured Co1.75 Ge Sum Co1.75 Ge1 ANX NO2 D(calc) 8.74 Title Ueber einige neue Vertereter des Ni As-Typs und ihre kristallchemische Bedeutung Author(s) Laves, F.;Wallbaum, H.J. Reference Zeitschrift fuer Angewandte Mineralogie (1942), 4, 17-46 Journal of the Less-Common Metals (1971), 24, 277-289 Zeitschrift fuer Metallkunde (1976), 67, 246-249 Annales de Chimie (Paris) (Vol=Year) (1963), 8, 85-249 Unit Cell 3.9251(5) 3.9251 5.003(5) 90. 90. 120. Vol 66.75 Z 2 Space Group P 63/m m c SG Number 194 Cryst Sys hexagonal Pearson hP6 Wyckoff d c a Red Cell P 3.925 3.925 5.003 90 90 120 66.752 Trans Red 1.000 0.000 0.000 / 0.000 1.000 0.000 / 0.000 0.000 1.000 Comments Cell from 2nd reference: 3.940, 5.018 (Co1.92 Ge1.08) Cell from 3nd reference: 3.914, 5.004 (Co1.89 Ge1.11) Cell from 4th reference: 3.963, 4.995 (Co1.92 Ge1.08) Total SOF on at least one site differs from unity (SOF < 0.997 resp. SOF > 1.003) The structure has been assigned a PDF number (calculated powder diffraction data): 01-071-4263 Structure type : InNi2 X-ray diffraction (powder) Unusual difference between calculated and measured density No R value given in the paper. At least one temperature factor missing in the paper. Atom # OX SITE x y z SOF H Co 1 +0 2 a 0 0 0 1. 0 Co 2 +0 2 d 0.3333 0.6667 0.75 0.75 0 Ge 1 +0 2 c 0.3333 0.6667 0.25 1. 0 *end for ICSD #52965 |

8楼2009-02-18 00:10:56
xi2004
至尊木虫 (职业作家)
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★ ★ ★ ★ ★ ★ ★ ★ ★ ★
waiy2001(金币+10,VIP+0):楼主感谢你的,呵呵 2-19 12:55
waiy2001(金币+10,VIP+0):楼主感谢你的,呵呵 2-19 12:55
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*data for ICSD #616420 Coll Code 616420 Rec Date 2008/08/01 Chem Name Beryllium Silicon Zirconium (1/1/1) Structured Be Si Zr Sum Be1 Si1 Zr1 ANX NOP D(calc) 4.97 Title The crystal structures of Zr Be Si and Zr Be2 Author(s) Nielsen, J.W.;Baenziger, N.C. Reference Acta Crystallographica (1,1948-23,1967) (1954), 7, 132-133 Unit Cell 3.71 3.71 7.19 90.0 90.0 120.0 Vol 85.71 Z 2 Space Group P 63/m m c SG Number 194 Cryst Sys hexagonal Pearson hP6 Wyckoff d c a Red Cell P 3.71 3.71 7.19 90 90 119.999 85.705 Trans Red 1.000 0.000 0.000 / 0.000 1.000 0.000 / 0.000 0.000 1.000 Comments Metals Sdata Record: REF= 30; INT= film; RAD= Cu; APP= Weissenberg Metals structure type In Ni2 Structure type : ZrBeSi X-ray diffraction from single crystal No R value given in the paper. At least one temperature factor missing in the paper. Atom # OX SITE x y z SOF H Be 1 +0 2 c 0.3333 0.6667 0.25 1 0 Si 1 +0 2 d 0.3333 0.6667 0.75 1 0 Zr 1 +0 2 a 0 0 0 1 0 *end for ICSD #616420 |

9楼2009-02-18 00:16:46
xi2004
至尊木虫 (职业作家)
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*data for ICSD #52020 Coll Code 52020 Rec Date 2003/04/01 Chem Name Manganese Germanide (2/1) - Ht Structured Mn2 Ge Sum Ge1 Mn2 ANX A2X D(calc) 7.62 Title Kristallstrukturdaten von Mn2 Ge Author(s) Ellner, M. Reference Journal of Applied Crystallography (1980), 13, 99-100 Unit Cell 4.171(1) 4.171 5.278(2) 90. 90. 120. Vol 79.52 Z 2 Space Group P 63/m m c SG Number 194 Cryst Sys hexagonal Pearson hP6 Wyckoff d c a Red Cell P 4.171 4.171 5.278 90 90 120 79.521 Trans Red 1.000 0.000 0.000 / 0.000 1.000 0.000 / 0.000 0.000 1.000 Comments Filled NiAs-type The structure has been assigned a PDF number (calculated powder diffraction data): 01-071-3625 The structure has been assigned a PDF number (experimental powder diffraction data): 35-1060 Structure type : InNi2 X-ray diffraction from single crystal No R value given in the paper. At least one temperature factor missing in the paper. Atom # OX SITE x y z SOF H Mn 1 +2 2 a 0 0 0 1. 0 Mn 2 +2 2 d 0.3333 0.6667 0.75 1. 0 Ge 1 -4 2 c 0.3333 0.6667 0.25 1. 0 *end for ICSD #52020 |

10楼2009-02-18 00:17:52












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