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19_23 - LATTICE SPACING 0F COMMON ANALYZING CRYSTALS...

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Unformatted text preview: LATTICE SPACING 0F COMMON ANALYZING CRYSTALS Reflection a ! Reflection 0 Crystal plane a‘ Spacing {A} 5 Crystal plane d Spacing {A} ADP“ IUI 5.3] Lead stearate 5i ADP“ 110 5.325 LiF 200 2.014 ADP“ 200 3.75 5 UP 220 1.424 Beryl 1010 7.98 : Mica 002 9.96 Calcite 100 3.036 : NaCl 200 2.820 EDDT” 020 4.404 I Oxalic acid 001 5.35 Germanium 1 1 1 3.265 ' PE!" 002 4.371 Graphite 001 6.69 Quartz 10—i0 4.225 Gypsum 0 I 0 2.600 . Quartz 10—11 3.343 KAP“ 001 13.32 Quartz 1 [‘20 2.456 KBr 200 3.29 Silicon 111 3.13 KCI 200 3.14 Topaz 303 1.356 Whi le several of the above spacings have been measured to more than four significant figures. no more than four figures are given how because complications introduced by the index of refraction. anomalous dispersion. temperature coefficient of expansion. and crystal impurities must be considered before the additional figures are useful. “ Ammonium dihydrogen phosphate. 1‘ Ethylenediamine d—tanrate. C Potassium acid phthalate. ‘1 Pentaerythritol. ...
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