What about RAW file size, assuming the resolution is correct => 8,142 x 5,428 x 16 = 707,116,416 bits so divide by 8 ( 8 bits = 1 byte) becomes 88,389,552 bytes, so divide by 1,024 to get kilobytes = 86,317 Kb (or about 86MB) per image shot x 5 shots per second equals nearly half a gigabyte of your card gone in just 1 sec, so 30 secs @ hi-speed continuous shooting and your 16GB CF card is full!
edit: had to re-read that was 46.1MP and not 48.1MP