Volkert, C. A.; Busch, S.; Heiland, B.; Dehm, G.: Transmission electron microscopy of fluorapatite-gelatine composite particles prepared using focused ion beam milling. Journal of Microscopy 214 (3), pp. 208 - 212 (2004)
If manganese nodules can be mined in an environmentally friendly way, the critical metals needed for the energy transition could be produced with low CO2 emissions