Dear all: How I can know wyckyoff position of the LiC6 and LiC12(Lithuim graphite or Lithiated graphite). LiC6 JCPDS card 34-1320 P6/mmm a=4.305 c=3.706 LiC12 JCPDS card 35-1046 P6/mmm a=4.288 c=7.063 Thank you in davance. Serk-won Jang serkwon2003...@yahoo.com