5
Experimental geometry from CCCBDB: https://cccbdb.nist.gov/exp2x.asp?casno=74828&charge=0
C   0.0000   0.0000   0.0000
H   0.6276   0.6276   0.6276
H   0.6276  -0.6276  -0.6276
H  -0.6276   0.6276  -0.6276
H  -0.6276  -0.6276   0.6276
