1 results about "Cryptomelane" patented technology

Cryptomelane is a potassium manganese oxide mineral with formula K(Mn⁴⁺,Mn²⁺)₈O₁₆. In 1942 the name cryptomelane was proposed as part of an effort to sort out the manganese oxide minerals referred to as psilomelane. Cryptomelane was identified and defined based on X-ray diffraction studies of samples from Tombstone, Arizona; Deming, New Mexico; Mena, Arkansas; and Philipsburg, Montana.