research papers
Complicated hk0 Weissenberg photographs from orthorhombic TlNO2.4tu (tu = thiourea) have been explained in terms of twinning on (110) and (10) planes (three individuals). The more complicated photographs from (isomorphous) Tl2CO3.8tu have been explained in terms of twinning on (110), (10) and (120) planes (six individuals).