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`Laue' symmetry
International Tables for Crystallography (2006). Vol. C, Section 1.4.3.2, p. 21 [ doi:10.1107/97809553602060000575 ]
... eleven conventional `Laue' symmetries [International Tables for Crystallography (2005), Volume A, Section 3.1.2 and elsewhere] involve the explicit assumption of Friedel ... Patterson symmetry. References International Tables for Crystallography (2005). Vol. A. Space-group symmetry, fifth ed., edited by Th. Hahn. Heidelberg: Springer. International Tables for Crystallography (2006). Vol. C, ch. 1.4, p. 21 © International Union of Crystallography 2006 | ...
[more results from section 1.4.3 in volume C]
Symmorphic space groups
International Tables for Crystallography (2006). Vol. C, Section 1.4.2.1, p. 21 [ doi:10.1107/97809553602060000575 ]
... nothing fundamental about the nature of symmorphism; they are simply a consequence of the conventions governing the construction of symbols in ... do not contain screw axes or glide planes, this is a result of the manner in which the space-group symbols ... tables of space-group symbols. International tables for crystallography, Vol. A, edited by Th. Hahn, Part 4. Heidelberg: Springer. Wolff, ...
[more results from section 1.4.2 in volume C]
Arithmetic crystal classes in one, two and higher dimensions
International Tables for Crystallography (2006). Vol. C, Section 1.4.1.2, p. 16 [ doi:10.1107/97809553602060000575 ]
... there are two geometric crystal classes, 1 and m, and a single Bravais lattice, . Two arithmetic crystal classes result, and ... ten geometric crystal classes, and two Bravais lattices, p and c; 13 arithmetic crystal classes result. The two-dimensional geometric and ... this volume. References Brown, H., Bülow, R., Neubüser, J., Wondratschek, H. & Zassenhaus, H. (1978). Crystallographic groups of ...
[more results from section 1.4.1 in volume C]
Introduction
International Tables for Crystallography (2006). Vol. C, ch. 5.1, p. 490 [ doi:10.1107/97809553602060000595 ]
Chapter 5.1. Introduction A brief overview of Chapters 5.2 to 5.5 on the determination ... will be found in Klug & Alexander (1974) and Peiser, Rooksby & Wilson (1960). The proceedings of the symposium on Accuracy in ... Gaithersburg in 1979 (Block & Hubbard, 1980) are particularly valuable as a source of information on developments of all aspects of ...
Media for organic substances
International Tables for Crystallography (2006). Vol. C, Section 3.3.4, p. 161 [ doi:10.1107/97809553602060000587 ]
... refractive index of the saturated medium is then measured with a microrefractometer (Jelley, 1934, pp. 236-240). References Jelley, E. E. (1934). A microfractometer and its use in chemical microscopy. J. R. Microsc. Soc. 54, 234-245. International Tables for ...
High-index media
International Tables for Crystallography (2006). Vol. C, Section 3.3.3, pp. 160-161 [ doi:10.1107/97809553602060000587 ]
... . Above about 2.2, the index must be determined at a wavelength for which selenium is transparent; the red line of ... the determination of high refractive indices with the microscope. Am. J. Sci. 34, 42-47. International Tables for Crystallography (2006). Vol. C, ch. 3.3, pp. 160-161 © International Union of Crystallography ...
Media for general use
International Tables for Crystallography (2006). Vol. C, Section 3.3.2, p. 160 [ doi:10.1107/97809553602060000587 ]
... and generally satisfactory. They were selected because they require only a small number of liquids for their preparation. In general, each ... methylene iodide or [alpha]-bromonaphthalene for lower n) 1.814 (25°C) 7 × 10-4 Rather strong 2S, 2As2S2, 6AsBr3 (mix with 10% sulfur in AsBr3 for lower n) 2.003 (25°C) 6 × 10-4 Rather strong 2Se, 2As2S2, 6AsBr3 (mix ...
Introduction
International Tables for Crystallography (2006). Vol. C, Section 3.3.1, p. 160 [ doi:10.1107/97809553602060000587 ]
... of crystals are complex, and it is planned to include a full account in Volume D . What follows is restricted to a brief description of immersion media for use in the measurement ... or both. References International Tables for Crystallography (2006). Vol. C, ch. 3.3, p. 160 © International Union of Crystallography 2006 | ...
Optimization of counting times
International Tables for Crystallography (2006). Vol. C, Section 7.5.7, pp. 667-668 [ doi:10.1107/97809553602060000608 ]
... and Ij if , and is the variance of , , if i = j. There is very little correlation2 between successive intensity measurements in ... becomes These equations are strictly accurate only if F is a linear function of the I's, a condition satisfied for the integrated intensity, but for few ...
Treatment of measured-as-negative (and other weak) intensities
International Tables for Crystallography (2006). Vol. C, Section 7.5.6, p. 667 [ doi:10.1107/97809553602060000608 ]
... those for which the subtraction of background has resulted in a negative net intensity, at their measured values will lead to a bias in the parameters resulting from a least-squares refinement. This is, however, inconsistent with the ...
International Tables for Crystallography (2006). Vol. C, Section 1.4.3.2, p. 21 [ doi:10.1107/97809553602060000575 ]
... eleven conventional `Laue' symmetries [International Tables for Crystallography (2005), Volume A, Section 3.1.2 and elsewhere] involve the explicit assumption of Friedel ... Patterson symmetry. References International Tables for Crystallography (2005). Vol. A. Space-group symmetry, fifth ed., edited by Th. Hahn. Heidelberg: Springer. International Tables for Crystallography (2006). Vol. C, ch. 1.4, p. 21 © International Union of Crystallography 2006 | ...
[more results from section 1.4.3 in volume C]
Symmorphic space groups
International Tables for Crystallography (2006). Vol. C, Section 1.4.2.1, p. 21 [ doi:10.1107/97809553602060000575 ]
... nothing fundamental about the nature of symmorphism; they are simply a consequence of the conventions governing the construction of symbols in ... do not contain screw axes or glide planes, this is a result of the manner in which the space-group symbols ... tables of space-group symbols. International tables for crystallography, Vol. A, edited by Th. Hahn, Part 4. Heidelberg: Springer. Wolff, ...
[more results from section 1.4.2 in volume C]
Arithmetic crystal classes in one, two and higher dimensions
International Tables for Crystallography (2006). Vol. C, Section 1.4.1.2, p. 16 [ doi:10.1107/97809553602060000575 ]
... there are two geometric crystal classes, 1 and m, and a single Bravais lattice, . Two arithmetic crystal classes result, and ... ten geometric crystal classes, and two Bravais lattices, p and c; 13 arithmetic crystal classes result. The two-dimensional geometric and ... this volume. References Brown, H., Bülow, R., Neubüser, J., Wondratschek, H. & Zassenhaus, H. (1978). Crystallographic groups of ...
[more results from section 1.4.1 in volume C]
Introduction
International Tables for Crystallography (2006). Vol. C, ch. 5.1, p. 490 [ doi:10.1107/97809553602060000595 ]
Chapter 5.1. Introduction A brief overview of Chapters 5.2 to 5.5 on the determination ... will be found in Klug & Alexander (1974) and Peiser, Rooksby & Wilson (1960). The proceedings of the symposium on Accuracy in ... Gaithersburg in 1979 (Block & Hubbard, 1980) are particularly valuable as a source of information on developments of all aspects of ...
Media for organic substances
International Tables for Crystallography (2006). Vol. C, Section 3.3.4, p. 161 [ doi:10.1107/97809553602060000587 ]
... refractive index of the saturated medium is then measured with a microrefractometer (Jelley, 1934, pp. 236-240). References Jelley, E. E. (1934). A microfractometer and its use in chemical microscopy. J. R. Microsc. Soc. 54, 234-245. International Tables for ...
High-index media
International Tables for Crystallography (2006). Vol. C, Section 3.3.3, pp. 160-161 [ doi:10.1107/97809553602060000587 ]
... . Above about 2.2, the index must be determined at a wavelength for which selenium is transparent; the red line of ... the determination of high refractive indices with the microscope. Am. J. Sci. 34, 42-47. International Tables for Crystallography (2006). Vol. C, ch. 3.3, pp. 160-161 © International Union of Crystallography ...
Media for general use
International Tables for Crystallography (2006). Vol. C, Section 3.3.2, p. 160 [ doi:10.1107/97809553602060000587 ]
... and generally satisfactory. They were selected because they require only a small number of liquids for their preparation. In general, each ... methylene iodide or [alpha]-bromonaphthalene for lower n) 1.814 (25°C) 7 × 10-4 Rather strong 2S, 2As2S2, 6AsBr3 (mix with 10% sulfur in AsBr3 for lower n) 2.003 (25°C) 6 × 10-4 Rather strong 2Se, 2As2S2, 6AsBr3 (mix ...
Introduction
International Tables for Crystallography (2006). Vol. C, Section 3.3.1, p. 160 [ doi:10.1107/97809553602060000587 ]
... of crystals are complex, and it is planned to include a full account in Volume D . What follows is restricted to a brief description of immersion media for use in the measurement ... or both. References International Tables for Crystallography (2006). Vol. C, ch. 3.3, p. 160 © International Union of Crystallography 2006 | ...
Optimization of counting times
International Tables for Crystallography (2006). Vol. C, Section 7.5.7, pp. 667-668 [ doi:10.1107/97809553602060000608 ]
... and Ij if , and is the variance of , , if i = j. There is very little correlation2 between successive intensity measurements in ... becomes These equations are strictly accurate only if F is a linear function of the I's, a condition satisfied for the integrated intensity, but for few ...
Treatment of measured-as-negative (and other weak) intensities
International Tables for Crystallography (2006). Vol. C, Section 7.5.6, p. 667 [ doi:10.1107/97809553602060000608 ]
... those for which the subtraction of background has resulted in a negative net intensity, at their measured values will lead to a bias in the parameters resulting from a least-squares refinement. This is, however, inconsistent with the ...
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