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cyj200511鐵蟲 (小有名氣)
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[求助]
關(guān)于TiB的cif晶體結(jié)構(gòu)困惑 已有1人參與
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針對TiB的B27結(jié)構(gòu),有資料顯示a = 0.456nm, b = 0.612 nm, and c = 0.306 nm; alpha = beta= gama = 90°; 還有的是 a =0.612nm, b = 0.306 nm, and c = 0.456 nm;還有的是a =0.306nm, b = 0.456 nm, and c = 0.612 nma, b, c順序不同會對衍射斑點的標(biāo)定及晶面間距的計算產(chǎn)生影響。哪個是正確的呢? 同時救助準(zhǔn)確的TiB的B27結(jié)構(gòu)cif文件。 |
至尊木蟲 (著名寫手)

至尊木蟲 (著名寫手)
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B27就是Pnma,一般來說abc有個大小的默認(rèn)設(shè)計關(guān)系,具體是啥我就不清楚了,標(biāo)準(zhǔn)的cif文件如下(粘貼txt把后綴名修改為cif即可): #(C) 2019 by FIZ Karlsruhe - Leibniz Institute for Information Infrastructure. All rights reserved. data_24701-ICSD _database_code_ICSD 24701 _audit_creation_date 1980-01-01 _chemical_name_systematic 'Titanium boride (1/1)' _chemical_formula_structural 'Ti B' _chemical_formula_sum 'B1 Ti1' _chemical_name_structure_type FeB _exptl_crystal_density_diffrn 4.57 _publ_section_title 'The Crystal Structure of Ti B' loop_ _citation_id _citation_journal_full _citation_year _citation_journal_volume _citation_page_first _citation_page_last _citation_journal_id_ASTM primary 'Acta Crystallographica' 1954 7 77 81 ACCRA9 loop_ _publ_author_name 'Decker, B.F.' 'Kasper, J.S.' _cell_length_a 6.12(1) _cell_length_b 3.06(1) _cell_length_c 4.56(1) _cell_angle_alpha 90. _cell_angle_beta 90. _cell_angle_gamma 90. _cell_volume 85.4 _cell_formula_units_Z 4 _symmetry_space_group_name_H-M 'P n m a' _symmetry_Int_Tables_number 62 loop_ _symmetry_equiv_pos_site_id _symmetry_equiv_pos_as_xyz 1 'x+1/2, y, -z+1/2' 2 'x, -y+1/2, z' 3 '-x+1/2, y+1/2, z+1/2' 4 '-x, -y, -z' 5 '-x+1/2, -y, z+1/2' 6 '-x, y+1/2, -z' 7 'x+1/2, -y+1/2, -z+1/2' 8 'x, y, z' loop_ _atom_type_symbol _atom_type_oxidation_number Ti0+ 0 B0+ 0 loop_ _atom_site_label _atom_site_type_symbol _atom_site_symmetry_multiplicity _atom_site_Wyckoff_symbol _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_B_iso_or_equiv _atom_site_occupancy _atom_site_attached_hydrogens Ti1 Ti0+ 4 c 0.177 0.25 0.123 . 1. 0 B1 B0+ 4 c 0.029 0.25 0.603 . 1. 0 #End of TTdata_24701-ICSD |

鐵蟲 (小有名氣)
新蟲 (初入文壇)
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