ABOUT THE TREATMENT OF WEAK REFLECTIONS IN DIRECT PROCEDURES

被引:8
作者
CASCARANO, G
GIACOVAZZO, C
GUAGLIARDI, A
机构
来源
ACTA CRYSTALLOGRAPHICA SECTION A | 1991年 / 47卷
关键词
D O I
10.1107/S0108767391004816
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Measurement of weak reflexions is often skipped by computer-controlled diffractometers. Such a practice can cause systematic errors in the scale and thermal factors as calculated by a Wilson plot, with consequent difficulties for the solution of the crystal structure by direct methods. A simple statistical method for estimating unobserved reflexions is described together with applications of the method.
引用
收藏
页码:698 / 702
页数:5
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共 16 条
  • [1] SIR88 - A DIRECT-METHODS PROGRAM FOR THE AUTOMATIC SOLUTION OF CRYSTAL-STRUCTURES
    BURLA, MC
    CAMALLI, M
    CASCARANO, G
    GIACOVAZZO, C
    POLIDORI, G
    SPAGNA, R
    VITERBO, D
    [J]. JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1989, 22 : 389 - 393
  • [2] THE METHOD OF REPRESENTATIONS OF STRUCTURE SEMINVARIANTS - THE STRENGTHENING OF TRIPLET RELATIONSHIPS
    CASCARANO, G
    GIACOVAZZO, C
    CAMALLI, M
    SPAGNA, R
    BURLA, MC
    NUNZI, A
    POLIDORI, G
    [J]. ACTA CRYSTALLOGRAPHICA SECTION A, 1984, 40 (MAY): : 278 - 283
  • [3] THE THEORY OF SIGN RELATIONS BETWEEN STRUCTURE FACTORS
    COCHRAN, W
    WOOLFSON, MM
    [J]. ACTA CRYSTALLOGRAPHICA, 1955, 8 (01): : 1 - 12
  • [4] SUPERSTRUCTURE WITH PSEUDO TRANSLATION .2. MONOPOTASSIUM PENTACHROMIUM OCTASELENIDE - A TUNNEL STRUCTURE
    DUNG, NH
    TIEN, VV
    BEHM, HJ
    BEURSKENS, PT
    [J]. ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS, 1987, 43 : 2258 - 2260
  • [5] STRENGTHENING OF TRIPLET RELATIONSHIP .2. NEW PROBABILISTIC APPROACH IN P1
    GIACOVAZZO, C
    [J]. ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES, 1977, 33 (JUL1): : 527 - 531
  • [6] GENERAL APPROACH TO PHASE RELATIONSHIPS - METHOD OF REPRESENTATIONS
    GIACOVAZZO, C
    [J]. ACTA CRYSTALLOGRAPHICA SECTION A, 1977, 33 (NOV): : 933 - 944
  • [7] NORMALIZED STRUCTURE FACTORS .2. ESTIMATING A RELIABLE VALUE OF B
    HALL, SR
    SUBRAMANIAN, V
    [J]. ACTA CRYSTALLOGRAPHICA SECTION A, 1982, 38 (SEP): : 590 - 598
  • [8] NORMALIZED STRUCTURE FACTORS .3. ESTIMATION OF ERRORS
    HALL, SR
    SUBRAMANIAN, V
    [J]. ACTA CRYSTALLOGRAPHICA SECTION A, 1982, 38 (SEP): : 598 - 608
  • [9] ON THE TREATMENT OF UNOBSERVED REFLEXIONS IN THE LEAST-SQUARES ADJUSTMENT OF CRYSTAL STRUCTURES
    HAMILTON, WC
    [J]. ACTA CRYSTALLOGRAPHICA, 1955, 8 (03): : 185 - 186
  • [10] NEW METHOD IN PROBABILISTIC THEORY OF STRUCTURE INVARIANTS
    HAUPTMAN, H
    [J]. ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES, 1975, 31 (SEP1): : 680 - 687