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zhengjuan

银虫 (小有名气)

[交流] 新手请教一大堆CIF问题,请高手指点,感谢万分!

Alert level A
SYMM001_ALERT_1_A  _symmetry_cell_setting is missing
            The cell setting should be one of the following
            *  triclinic
            *  monoclinic
            *  orthorhombic
            *  tetragonal
            *  rhombohedral
            *  trigonal
            *  hexagonal
            *  cubic
            The following tests will not be performed.
            SYMMS_01,SYMMS_02
SYMM003_ALERT_1_A  _symmetry_space_group_name_H-M is missing
            Space-group symbol, including unique axis.
            The following tests will not be performed.
            CELLZ_01,CHEMW_03,REFLT_03,SYMMG_01,SYMMG_02
CELL003_ALERT_1_A  _cell_measurement_reflns_used is missing
            Number of reflections used to measure unit cell.
CELL004_ALERT_1_A  _cell_measurement_theta_min is missing
            Minimum theta of reflections used to measure unit cell.
            The following tests will not be performed.
            CELLT_01
CELL005_ALERT_1_A  _cell_measurement_theta_max is missing
            Maximum theta of reflections used to measure unit cell.
            The following tests will not be performed.
            CELLT_01
EXPT005_ALERT_1_A  _exptl_crystal_description is missing
            Crystal habit description.
            The following tests will not be performed.
            CRYSR_01
EXPT009_ALERT_1_A  No crystal dimensions have been given.
            The following tests will not be performed.
            CRYSS_01,CRYSS_02
EXPT108_ALERT_1_A  The magnitudes of the crystal dimensions do not
            match the min, mid and max definitions
EXPT010_ALERT_1_A  _exptl_crystal_colour (_pd_char_colour for powder) is missing
            Crystal colour.
            The following tests will not be performed.
            CRYSC_01
DIFF003_ALERT_1_A  _diffrn_measurement_device_type is missing
            Diffractometer make and type. Replaces _diffrn_measurement_type.
DIFF005_ALERT_1_A  _diffrn_measurement_method is missing
            Mode of intensity measurement and scan.
DIFF019_ALERT_1_A  _diffrn_standards_number is missing
            Number of standards used in measurement.
DIFF020_ALERT_1_A  _diffrn_standards_interval_count and
            _diffrn_standards_interval_time are missing. Number of measurements
            between standards or time (min) between standards.
DIFF022_ALERT_1_A  _diffrn_standards_decay_% is missing
            Percentage decrease in standards intensity.
ABSTM02_ALERT_3_A  Test not performed as the _exptl_absorpt_correction_type
            has not been identified. See test ABSTY_01.
ABSTY01_ALERT_1_A  The absorption correction should be one of the following
            *  none
            *  analytical
            *  integration
            *  numerical
            *  gaussian
            *  empirical
            *  psi-scan
            *  multi-scan
            *  refdelf
            *  sphere
            *  cylinder
PLAT306_ALERT_2_A Isolated Oxygen Atom (H-atoms Missing ?) .......        O1W     
PLAT043_ALERT_1_A Check Reported Molecular Weight ................     117.72      
PLAT044_ALERT_1_A Calculated and Reported Dx Differ ..............          ?
PLAT051_ALERT_1_A Mu(calc) and Mu(CIF) Ratio Differs from 1.0 by .      50.08 Perc.
PLAT052_ALERT_1_A (Proper) Absorption Correction Method Missing ..          ?
PLAT053_ALERT_1_A Minimum Crystal Dimension Missing (or Error) ...          ?
PLAT054_ALERT_1_A Medium  Crystal Dimension Missing (or Error) ...          ?
PLAT055_ALERT_1_A Maximum Crystal Dimension Missing (or Error) ...          ?
PLAT078_ALERT_1_A No H-atoms, but _solution_hydrogens reported as        geom     
PLAT079_ALERT_1_A No H-atoms, but _hydrogen_treatment reported as       mixed     
PLAT122_ALERT_1_A No _symmetry_space_group_name_H-M Given ........          ?
--------------------------------------------------------------------------------Alert level B
CHEMS01_ALERT_1_B  The sum formula contains elements in the wrong order.
            H  precedes B
            Sequence must be C, H, then alphabetical.
REFNR01_ALERT_3_B  Ratio of reflections to parameters is < 8 for a
            non-centrosymmetric structure, where ZMAX > 18
            sine(theta)/lambda                0.5595
            Proportion of unique data used    1.0000
            Ratio reflections to parameters   7.6190
THETM01_ALERT_3_B  The value of sine(theta_max)/wavelength is less than 0.575
            Calculated sin(theta_max)/wavelength =    0.5595
PLAT112_ALERT_2_B ADDSYM Detects Additional (Pseudo) Symm. Elem...          2     
PLAT112_ALERT_2_B ADDSYM Detects Additional (Pseudo) Symm. Elem...          2     
PLAT112_ALERT_2_B ADDSYM Detects Additional (Pseudo) Symm. Elem...          2     
PLAT112_ALERT_2_B ADDSYM Detects Additional (Pseudo) Symm. Elem...          2     
PLAT112_ALERT_2_B ADDSYM Detects Additional (Pseudo) Symm. Elem...          2     
PLAT112_ALERT_2_B ADDSYM Detects Additional (Pseudo) Symm. Elem...          2     
--------------------------------------------------------------------------------
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chemj.cn

你想问什么啊,
贴一大堆东西出来,
2楼2008-11-30 21:53:06
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级数收敛


warlen(金币+1,VIP+0):欢迎常来!
1、找cif模板(iucr网站上就有)把大多数问号处补齐
2、收集衍射的角度不够,一般要到25°,此时theta/lambda约为0.6
3、衍射数相对参数来说太少,原因可能和2有关
4、SFAC里面填的元素种类次序不对,先C后H,再按照字母序
5、UNIT里面各元素个数不对
6、O1W没有加氢
7、可能有更高的伪对称操作?这条我不是太确定

[ Last edited by 级数收敛 on 2008-11-30 at 21:58 ]
3楼2008-11-30 21:56:32
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zhengjuan

银虫 (小有名气)

感谢回复!请问:

收集衍射的角度不够,衍射数相对参数来说太少是不是需要重新上衍射仪上收数据?
4楼2008-11-30 22:25:19
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xi2004

至尊木虫 (职业作家)


warlen(金币+1,VIP+0):多谢应助!
先查看一下.ins中有没有用了omit
如果有, 是否omit -2 48
xi2004-emuch@163.com
5楼2008-11-30 22:53:20
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级数收敛

原来如彼啊,果然厉害
引用回帖:
Originally posted by xi2004 at 2008-11-30 22:53:
先查看一下.ins中有没有用了omit
如果有, 是否omit -2 48

6楼2008-12-01 11:03:36
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qwrm

新虫 (初入文坛)

看的头晕
7楼2009-02-14 05:10:37
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fengqian2004

木虫 (著名写手)

还有些提示自己可以解决的,比如,晶体颜色,密度,描述加上即可,空间群要有点结构知识。
痛并快乐着
8楼2009-02-14 07:33:33
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