Erratum to: Phys Chem Minerals DOI 10.1007/s00269-012-0482-3

Unfortunately, four authors were inadvertently not included in the author group/affiliation of the original publication. The complete authors group should read as:

Bing Zhou · Vladimir K. Michaelis · Stanton R. Giesbrecht · Scott Kroeker · Barbara L. Sherriff · Zhaohua Sun · Yefeng Yao · Yuanming Pan

There is also an error in the acknowledgement section, and the corrected text is given below:

Acknowledgments We thank Dr. M. Matsui and two reviewers for incisive criticisms and helpful suggestions. Funding for this study was provided by the “One Hundred People Plan” by Chinese Academy of Sciences (BZ). YY also acknowledges financial support from NSFC grant no. 20804016. The authors would like to thank Dr. Kimberly Tait, Mr. Brendt C. Hyde and Prof. Mianping Zheng for provision of samples, and SK is grateful to NSERC of Canada for operating funds and the Canada Foundation for Innovation for infrastructure support. VKM thanks NSERC of Canada for a post-graduate scholarship. Access to the 21 T NMR spectrometer was provided by the National Ultrahigh-Field NMR Facility for Solids (Ottawa, Canada), a national research facility funded by the Canada Foundation for Innovation, the Ontario Innovation Trust, Recherche Quebec, the National Research Council Canada, and Bruker BioSpin and managed by the University of Ottawa (http://www.nmr900.ca).