Detection of SI VI 1.962 Microns and New Observations of Infrared H, Fe ii, and H 2 Line Emission in the Seyfert Galaxy NGC 1068

We present measurements of several infrared lines in NGC 1068 including the [Si VI] transition at 1.962 micron which is detected for the first time in an extragalactic object. This line is among the brightest IR features (~ 5 times stronger than H_2_ 2.121 microns), is broad ({DELTA}ν ~ 1100 km s^-1^), and has a profile similar to He I 1.083 microns. The possibility of using the [Si VI] line to trace Seyfert activity and the origin of the H, [Fe II], and H_2_ lines are briefly discussed.