data_other_codes
loop_
_symbol_unicode_hex_code
_symbol_cif_special_code
_symbol_unicode_name
_symbol_iucr_description
'°' '°' 'DEGREE SIGN' degree
'–' '–' 'EN DASH'     dash
'—' '—' 'EM DASH'     'single bond'
'=' '=' 'EQUALS SIGN' 'double bond'
'≡' '≡' 'IDENTICAL TO' 'triple bond' 
'⎓' '⎓' 'DIRECT CURRENT SYMBOL FORM TWO'  'delocalized double bond'
'∼' '∼' 'TILDE OPERATOR' '~ (N.B. ~ is the code for subscript)'
'≃' '≃' 'ASYMPTOTICALLY EQUAL TO' ?
'∞' '∞' 'INFINITY' ?
'×' '×' 'MULTIPLICATION SIGN' ?
'±' '±' 'PLUS-MINUS SIGN' ?
'∓' '∓' 'MINUS-OR-PLUS SIGN' ?
'□' '□' 'WHITE SQUARE' ?
'≠' '≠' 'NOT EQUAL TO' ?
'⟩' '⟩' 'MATHEMATICAL RIGHT ANGLE BRACKET' ?
'⟨' '⟨' 'MATHEMATICAL LEFT ANGLE BRACKET' ?
'→' '→' 'RIGHTWARDS ARROW' ?
'←' '←' 'LEFTWARDS ARROW' ?
