1) Barium mineral 2) Mineral 3) Oxide mineral
Found on
https://www.crosswordclues.com/clue/psilomelane
Psilomelane, also known as black hematite (but not related to true hematite, which is an iron ore), is a group name for hard black manganese oxides such as hollandite and romanechite. Psilomelane consists of hydrous manganese oxide with variable amounts of barium and potassium. ==Formula== Generalized formula may be represented as Ba(Mn2+)(Mn4+)8O...
Found on
http://en.wikipedia.org/wiki/Psilomelane
• (n.) A hydrous oxide of manganese, occurring in smooth, botryoidal forms, and massive, and having an iron-black or steel-gray color.
Found on
http://thinkexist.com/dictionary/meaning/psilomelane/
Psi·lom'e·lane noun [ Greek ... bare + ..., ..., black.]
(Min.) A hydrous oxide of manganese, occurring in smooth, botryoidal forms, and massive, and having an iron-black or steel-gray color.
Found on
http://www.encyclo.co.uk/webster/P/187
Psilomelane is an ore of manganese. It usually occurs with pyrolusite but is different from other manganese oxides in that it is of greater hardness and has an apparent lack of crystal structure. It has the formulae BaMnO16(OH)4 and a relative hardness of 6.
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http://www.probertencyclopaedia.com/browse/HP.HTM
[
n] - a mineral consisting of hydrated basic oxide of manganese and barium
Found on
http://www.webdictionary.co.uk/definition.php?query=psilomelane
psilomelane, psilomelanic 1. Any mixture of black manganese oxide minerals. 2. Smooth hydrous manganese oxide compositions. 3. A common ore of manganese, a hydrated oxide, occurring in smooth black amorphous masses, or in botryoidal or stalactitic shape. 4. Etymology: Greek psilos, 'bare' plus melanos, 'black'.
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http://www.wordinfo.info/words/index/info/view_unit/1774/
noun a mineral consisting of hydrated basic oxide of manganese and barium; a source of manganese
Found on
https://www.encyclo.co.uk/local/20974
a common mineral consisting of a mixture of pyrolusite and other oxides of manganese, usually found in black, rounded masses: an ore of manganese.
Found on
https://www.infoplease.com/dictionary/psilomelane
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