Citation: Sch\"afer, Martin J; Jantz, Stephan G.; Pielnhofer, Florian; H\"oppe, Henning A (2019). The very first normal-pressure tin borate Sn3B4O9, and the intermediate Sn2[B7O12]F.. Dalton transactions (Cambridge, England : 2003), 48, pp. 10398-10402.