What is "canadolite"

The Canadian oil tanker Canadolite was a 11,309 grt. tanker. She was laid down in 1926 and launched later that year. She was owned by the Imperial Oil company and was built in Germany. On March 25, 1941, she was captured by the German auxiliary cruiser Kormoran and was subsequently turned into a German tanker. Canadolite was sunk by the British Cruiser Sydney in 1941. Her original crew was saved and captured, however they were sent to a German Internment camp.