from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A basic oxide of lithium, manganese and aluminium found in hydrothermal ore deposits and sedimentary manganese deposits, with the chemical formula (Al,Li)Mn4+O2(OH)2.

from The Century Dictionary and Cyclopedia

  • n. An impure hydrated manganese ore related to psilomelane, but peculiar in yielding lithium.


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