Wad (mineral)
{{Short description|Porous secondary manganese oxyhydroxide}}
{{Other uses|WAD (disambiguation)}}
Wad is an old mining term for any black manganese oxide or hydroxide mineral-rich rock in the oxidized zone of various ore deposits. Typically closely associated with various iron oxides. Specific mineral varieties include pyrolusite, lithiophorite, nsutite, takanelite and vernadite.[https://www.mindat.org/min-4225.html Wad on Mindat.org] Wad can be considered to be the manganese equivalent to the iron mineraloid limonite.
References
{{reflist}}
- {{Citation|first=Charles |last=Palache |first2=Harry |last2=Berman |first3=Clifford |last3=Frondel |year=1944 |title=The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides |publisher=John Wiley and Sons, Inc. |location=New York |edition=7th, revised and enlarged |pages=566-567}}
External links
{{wiktionary|wad|WAD}}
{{EB1911 poster|Wad}}