hollandite

hollandite

[′hä·lən‚dīt]
(mineralogy)
Ba(Mn2+,Mn4+)8O16 A silvery-gray to black mineral composed of manganate of barium and manganese; occurs as crystals.
References in periodicals archive ?
One example is hollandite that is dug out of the Italian Alps and shows promise for housing cesium.
New materials inspired by nature could provide safe methods for waste storage
Hollandite occurs rarely at Ilfeld as druses of tiny crystals in fissures in massive manganese ores, or encrusting barite (www.
Nsutite has been found, mixed with hollandite and other manganese oxide species, in a single Ilfeld specimen; tiny nsutite pseudomorphs after manganite crystals are discernible on the specimen (www.
Ilfeld Harz Mountains: Thuringia, Germany
Mineralogical composition of the fines at Balaghat and Ukwa mines is similar in nature and consists of Hollandite, Braunite, Psilomelane, Hematite, Apatite and Quartz.
Problems related to processing of manganese ore fines
French scientists summarize results from their research into hollandite, zirconolite, zirconolite-base glass-ceramics, and borosilicate glasses as matrices in which to store highly radioactive nuclear waste for a very long time.
Glass, glass-ceramics and glasses for immobilization of high-level nuclear wastes
The rarest specimens include scepters, crystals with moveable gas bubbles in fluid inclusions, fuschite inclusions, and star-shaped hollandite inclusions.
Jourmaline for breakfast a trip to Madagascar
One sample gave an XRD pattern that is a fairly good match for hollandite.
Zagi Mountain: Northwest Frontier Province Pakistan
A sub-district of this district is Animas-Chocaya district, Ferberite Aullagas See Colquechaca Avicaya Cassiterite, jarosite, stannite, vivianite Ayoreita Amethyst, hollandite, smoky quartz Berenguela Cassiterite, pyrite, pyrrhotite, silver sulfosalts Berenguela Apatite, greenockite, quartz, siderite, sphalerite.
A Guide to Mineral Localities in Bolivia
Associated minerals are: braunite, quartz, the "violan" variety of diopside-aegirine-jadeite, strontiopiemontite, hollandite, cryptomelane, jadeite, antimony-bearing titanite and arsenic-bearing titanite and arsenic-bearing fluorapatite.
ABSTRACTS OF NEW MINERAL DESCRIPTIONS
In the limonite orebodies of the Andrdssy I section, opaque, black, fibrous hollandite fills 0.
Famous Mineral Localities: RUDABANYA, HUNGARY
Relationship to other species: probably related to akaganeite and hollandite.
Abstracts of new mineral descriptions
Short, silver-gray prisms of hollandite, the barium analog of cryptomelane, have been found associated with calcite at the 3-km point along the old Laurium-Kamareza road.
New mineral occurrences from the Laurium mines: Greece
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