manganite

It also occurs in bogs and often results from alteration of manganite.

Its ores occur abundantly in nature as the minerals pyrolusite, manganite, etc.

In other words, the material consists of lanthanum manganite doped with strontium oxide.

The resulting calcium manganite can be reacted with HCl as in related processes:

It is a member of the diaspore group and is trimorphous with manganite and feitknechtite.

The todorokite has been altered near the surface and along faults or fissures to pyrolusite, and perhaps to manganite.

Other minerals from the sedimentary rocks include pyrite, calcite, barite, manganite, and pyrolusite.

The area of Wadh is rich in mineral resources, with large deposits of barite, chromite, magnesite, manganite.

Although described with various other names as early as 1772, the name manganite was first applied in a publication by W. Haidinger in 1827.

It occurs in association with pyrolusite, nsutite, braunite, chalcophanite, manganite and various other manganese oxides.

Commonly associated minerals are pyrolusite, cryptomelane, manganite, psilomelane, quartz, feldspar and calcite.

Crystals of manganite are prismatic and deeply striated parallel to their length; they are often grouped together in bundles.

Lanthanum strontium manganite exhibits colossal magnetoresistance.

Lanthanum calcium manganite (LCM)

The mineral Manganite of formula MnO(OH)

Lanthanum strontium manganite (LSM)

Pyrolusite occurs associated with manganite, hollandite, hausmannite, braunite, chalcophanite, goethite and hematite under Redox conditions in hydrothermal deposits.

The waste manganese(II) chloride solution is treated with lime, steam and oxygen, producing calcium manganite(IV):

Manganite occurs with other manganese oxides in deposits formed by circulating meteoric water in the weathering environment in clay deposits and laterites.

Currently, lanthanum strontium manganite (LSM) is the cathode material of choice for commercial use because of its compatibility with doped zirconia electrolytes.

The mineral is readily distinguished from other hydrous manganese oxides (manganite and wad) by its greater hardness 5 to 6; the specific gravity varies from 3.7 to 4.7.

This article is about the mineral of formula MnO(OH), for other uses of the term manganite see Manganite (disambiguation)

Although most gossans are red, orange, or yellow, black gossans from manganese oxides such as pyrolusite, manganite, and especially psilomelane form at the oxidized portion of Mn-rich mineral deposits.

Manganite occurs in specimens exhibiting good crystal form at Ilfeld in the Harz Mountains of Germany, where the mineral occurs with calcite and barite in veins traversing porphyry.