Phasen: Die Koexistenz von rhomboedrischen LiTMO2- (TM=Ni, Co, Mn) und monoklinen Strukturen vom Li2MnO3-Typ in Li1.2Mn0.567Ni0.166Co0.067O2 wird mit atomarer Auflösung direkt nachgewiesen. Die beobachtete Heterogrenzfläche entlang der [001]rh/[103]mon-Zonenachsenrichtung belegt den Zweiphasencharakter dieser lithiumreichen Kathodenmaterialien. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.