Provided is a material selecting method used upon purifying an iridium complex by sublimation which includes: selecting an iridium complex having a specific structure and having a rate of weight loss of 45% or greater when heated to 500\xb0 C. Another team member’s unified messaging inboxoutbox can receive the collaboration information and provide the collaboration information to the other team member in accordance with a receiving communication modality. 5 and 5; the Si atomic composition in the magnetic recording layer is between about 3 and 6 atomic %; and the O atomic composition in the magnetic recording layer is between about 12 and 20 atomic %, is used. The sprinklers of the operational area are preferably: configured so as to provider provide sufficient fluid volume and cooling to address the fire event with a surround and drown configuration,. This results in the improvement of the cornering traction of the vehicle, the braking traction of the vehicle, the acceleration traction of the vehicle, the simultaneous cornering and braking traction of the vehicle, and the simultaneous cornering and acceleration traction of the vehicle. This invention thus relates to the seeds of soybean variety XB31E09, to the plants of soybean XB31E09 to plant parts of soybean variety XB31E09 and to methods for producing a soybean plant produced by crossing plants of the soybean variety XB31E09 with another soybean plant, using XB31E09 as either the male or the female parent.