pyrolusite

American  

[pahy-ruh-loo-sahyt, pahy-rol-yuh-sahyt] / ˌpaɪ rəˈlu saɪt, paɪˈrɒl jəˌsaɪt /

noun

1. a common mineral, manganese dioxide, MnO 2 , the principal ore of manganese, used in various manufactures, as a decolorizer of brown or green tints in glass, and as a depolarizer in dry-cell batteries.

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pyrolusite British  

/ ˌpaɪrəʊˈluːsaɪt /

noun

1. a blackish fibrous or soft powdery mineral consisting of manganese dioxide in tetragonal crystalline form. It occurs in association with other manganese ores and is an important source of manganese. Formula: MnO 2

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Etymology

Origin of pyrolusite

1820–30; pyro- + Greek loûs ( is ) washing + -ite ¹

Example Sentences

See Examples For:

pyrolusite

Manganese is found in nature chiefly as the dioxide MnO2, called pyrolusite.

From An Elementary Study of Chemistry by McPherson, William

Generally resembles pyrolusite, but is distinguished from it by its superior hardness.

From The Elements of Blowpipe Analysis by Getman, Frederick Hutton

A sample of pyrolusite weighing 0.6000 gram is treated with 0.9000 gram of oxalic acid.

From An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes by Talbot, Henry P.

Appended are two analyses of pyrolusite containing sesquioxide of iron.

From British Manufacturing Industries Pottery, Glass and Silicates, Furniture and Woodwork. by Arnoux, L.

The chlorine generated by the pyrolusite is passed into a solution of potassium iodide.

From An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes by Talbot, Henry P.