SECTION VI - PRODUCTS OF THE CHEMICAL OR ALLIED INDUSTRIES > CHAPTER 28 - INORGANIC CHEMICALS; ORGANIC OR INORGANIC COMPOUNDS OF PRECIOUS METALS, OF RARE-EARTH METALS, OF RADIOACTIVE ELEMENTS OR OF ISOTOPES > VI. MISCELLANEOUS > 2845 Isotopes other than those of heading 2844; compounds, inorganic or organic, of such isotopes, whether or not chemically defined > Lithium enriched in lithium-6 and its compounds