Elements of X-ray Diffraction |
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Page 34
... Symmetry . Both Bravais lattices and the real crystals which are built up on them exhibit various kinds of symmetry . A body or structure is said to be symmetrical when its component parts are arranged in such balance , so to speak ...
... Symmetry . Both Bravais lattices and the real crystals which are built up on them exhibit various kinds of symmetry . A body or structure is said to be symmetrical when its component parts are arranged in such balance , so to speak ...
Page 35
... symmetry at all , while a 5 - fold axis or one of higher degree than 6 is impossible , in the sense that unit cells ... symmetry elements is a fundamental property of each crystal system , and one system is dis- tinguished from another ...
... symmetry at all , while a 5 - fold axis or one of higher degree than 6 is impossible , in the sense that unit cells ... symmetry elements is a fundamental property of each crystal system , and one system is dis- tinguished from another ...
Page 372
... symmetry about directions of the form ( 111 ) . Inasmuch as this is the minimum symmetry requirement for the cubic system , this cell [ Fig . 13-7 ( a ) ] is not cubic . There is , how- ever , four - fold rotational symmetry about [ 001 ] ...
... symmetry about directions of the form ( 111 ) . Inasmuch as this is the minimum symmetry requirement for the cubic system , this cell [ Fig . 13-7 ( a ) ] is not cubic . There is , how- ever , four - fold rotational symmetry about [ 001 ] ...
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Common terms and phrases
a₁ absorption coefficient absorption edge alloy analysis angle atomic number austenite axis back-reflection Bragg angle Bragg law Bravais lattice calculated camera circle composition constant copper atoms cos² counter cubic curve Debye ring Debye-Scherrer decrease determined diffracted beam diffraction lines diffraction pattern diffractometer direction distance electrons elements equation error example face-centered face-centered cubic factor film fluorescent fluorescent radiation given grain hexagonal incident beam indices integrated intensity lattice parameter martensite measured metal normal obtained orientation Orthorhombic parallel percent phase photograph pinhole pole figure position powder pattern produced projection pulses rays reciprocal lattice reciprocal-lattice reflecting planes relative residual stress rhombohedral rotation sample scattering shown in Fig sin² slit solid solution spacing specimen spectrometer sphere spot stereographic substance surface temperature tetragonal thickness tion transmission twin unit cell values vector voltage wave wavelength x-ray diffraction x-ray method x-ray tube zero zone