Elements of X-ray Diffraction |
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Page 31
... axes , equally inclined Rhombohedral α = = b = = C , a = B = Y 90 ° Simple R Hexagonal Two equal coplanar axes at 120 ° , third axis at right angles Simple P a = bc . a = B = 90 ° , γ = 120 ° Three unequal axes , Simple P Monoclinic one ...
... axes , equally inclined Rhombohedral α = = b = = C , a = B = Y 90 ° Simple R Hexagonal Two equal coplanar axes at 120 ° , third axis at right angles Simple P a = bc . a = B = 90 ° , γ = 120 ° Three unequal axes , Simple P Monoclinic one ...
Page 35
... axes . Such a lattice would be classified in the tetragonal system , which has no 3 - fold axes and in which accidental equality of the a and c axes is TABLE 2-2 SYMMETRY ELEMENTS invi'y System Minimum symmetry elements Cubic Four 3 ...
... axes . Such a lattice would be classified in the tetragonal system , which has no 3 - fold axes and in which accidental equality of the a and c axes is TABLE 2-2 SYMMETRY ELEMENTS invi'y System Minimum symmetry elements Cubic Four 3 ...
Page 38
... axes , and , since these axes form a convenient frame of reference , we might describe the orientation of the plane by giving the actual distances , measured from the origin , at which it intercepts the three axes . Better still , by ...
... axes , and , since these axes form a convenient frame of reference , we might describe the orientation of the plane by giving the actual distances , measured from the origin , at which it intercepts the three axes . Better still , by ...
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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