----- file created by makedoc on: Tue Mar  3 17:24:54 2009
----- Documentation for /scisoft/xop2.3/src_idl/optics/p_table.pro -----

 function p_table
 periodic table of the elements
 under construction v 0.1 MSR/94/03/02

 the returned value depends on the keyword set
 /density returns density
 /symbol returns the atomic symbol
 /shadow returns the symbol as shadow wants (i.e. CC for carbon)

 Modification: MSR 16/1/95 add entries for Diamond and He20 (He at 20 degrees)
 srio@esrf.fr C density is 2.62 and not 2.22 <bagnasco@SLAC.Stanford.EDU>

