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siderite
siderite
siderite (chalybite, spathose iron) Mineral, FeCO
3; sp. gr. 3.8–4.0;
hardness 3.5–4.5;
trigonal; grey to grey-brown or yellowish-brown, translucent when pure; white
streak; vitreous
lustre; uneven
fracture; crystals
rhombohedral with curved faces, but also occurs
massive, granular, fibrous, compact,
botryoidal, and
earthy in habit;
cleavage perfect rhombohedral {1011}; widespread in
sedimentary rocks, especially
clays and
shales where it is
concretionary and makes clay into
ironstone, also as a
gangue mineral in hydrothermal veins together with other metallic ores (e.g.
pyrite,
chalcopyrite, and
galena) and as a replacement mineral in
limestone; dissolves slowly in cold, dilute hydrochloric acid, which effervesces when warmed.
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Predicting iron staining of siderite-bearing microsyenites intended for dimension stone use.
Magazine article from: Construction and Building Materials; 3/1/2008; ; 700+ words
; ...performance of a microsyenite rock containing siderite, as a secondary mineral phase, from...have shown through petrography that the siderite secondary mineral in the Mt Gibraltar...Although the in situ oxidation of the siderite is visually observable, as pinhole...
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Longmen Steel starts development of the largest siderite mine in China.
Newspaper article from: China Business News; 7/4/2005; 700+ words
; ...Steel starts development of the largest siderite mine in China Shanghai. July 4. INTERFAX...started development of the Daxigou siderite mine, the largest of its kind in China...City, Sha'anxi Province, the Daxigou siderite mine's reserves total 302 mln tons...
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Yaxing Group commissions 2 mln-ton siderite selecting facility in Xinjiang.
Newspaper article from: China Business News; 11/20/2007; 567 words
; Yaxing Group commissions 2 mln-ton siderite selecting facility in Xinjiang Shanghai...kicked off operations at a 2 million-ton siderite selecting facility in Artux City in the...selecting capacity of 2 million tons of siderite per year, as well as 1.2 million tons...
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Materials handbook.(Magnesium Aluminate--Siderite)(Buyers Guide)
Magazine article from: Ceramic Industry; 1/1/2005; 700+ words
; MAGNESIUM ALUMINATE. (Spinel.) MgO-[Al.sub.2][O.sub.3]. M.p. 2135[degrees]C; softens at 1000-1100[degrees]. (See SPINEL.) MAGNESIUM ALUMINUM SILICATE. (See BINDERS.) MAGNESIUM ALUMINUM SILICATE SUPPLIERS R. T. VANDERBILT, CO. INC. P.O. Box 5150 Norwalk, CT 06856-5150 U.S.A. (203) 853-1400 Fax:
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Structurally preserved Paleozoic plant fossils: from the Cahaba coal field Jefferson Country, Alabama.
Magazine article from: Rocks & Minerals; 5/1/2007; ; 700+ words
; ...large amounts of coalified plant debris and siderite nodules (figs. 3, 4). Rarely, the plant...tissue present. Most were simply fine-grained siderite replacing pith cavities and siderite masses with compressed and coalified plant...
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Mineralogical examination of carbonates in the Crandon tailings
Magazine article from: Minerals & Metallurgical Processing; 5/1/2003; ; 700+ words
; ...to 15% (by weight) iron and lesser amounts of siderite and magnesian siderite. The proportion of calcium and magnesium-rich...However, some types of carbonates (e.g., siderite) are not capable of buffering acidity (Lapakko...
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LAWRENCE, Kan.: Kansas Geological Survey Researchers Receive Grant To Study Ancient Climate
News Wire article from: Targeted News Service; 8/20/2007; 566 words
; ...will use it to study the formation of siderite, a type of iron mineral, in today...environment. By better understanding how siderite is formed at present, they can learn more about the climate when siderite was formed in the past. In particular...
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Fluid Inclusion, Stable Isotope and Geochronologic Evidence of Cretaceous Collision-Related Formation of Hydrothermal Veins in the Gemeric Basement (Western Carpathians)
Magazine article from: Geolines; 1/1/2006; ; 700+ words
; ...Gemeric tectonic unit contains around 1300 siderite-sulphide and quartz-stibnite veins...gradient of 33.5 5.5C/km for the siderite stage of the Drozdiak vein in the northern...22 3C/km have been obtained from the siderite veins in the Roznava ore field of the...
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Almaden Minerals Ltd.: Progress Report on the San Carlos Project, Mexico.
News Wire article from: Canadian Corporate News; 11/23/2004; 700+ words
; ...skarn 50 cm chip N114545 2.22 9.9 2000 Siderite Vein specimen M058190 0.85 4.3 5270 7010 Siderite Vein 25 cm chip M058194 0.587 2.3 7430...disseminations of pyrite and limonitic pits. The siderite samples came from northeast trending...
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Bakalskoye Mining to boost output 8% in 2007.
Newspaper article from: Russia & CIS Business and Financial Newswire; 1/18/2007; 408 words
; ...plans to increase production of roasted siderite concentrate by 9.8% to 860,000 tonnes and output of sintered siderite by 14.8% to 490,000 tonnes. Commercial...than in 2005. Iron content in roasted siderite and sintered siderite amounted to respectively...
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siderite
Book article from: The Concise Oxford Dictionary of English Etymology
siderite †loadstone XVI; various min. uses from XVIII. In early use — F. sidérite or L. sidē...
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Siderite
Encyclopedia entry from: Encyclopedia of Occultism and Parapsychology
Siderite An old name for a loadstone or magnet. The term has also been variously used to indicate a steel-colored stone (possibly sapphire), a blue-colored quartz, carbonate of iron, and meteorites containing iron.
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ironstone
Book article from: A Dictionary of Earth Sciences
...These include: ( a ) replacement of carbonate particles by hematite , siderite , or chamosite ; ( b ) diagenetic development of nodules, and more continuous horizons, of siderite within claystone sequences; ( c ) primary deposition of ooids from...
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Iron
Encyclopedia entry from: The Gale Encyclopedia of Science
...primary constituent of Earth ’ s core as well as of siderite meteorites. Soil samples taken from the moon indicate that...3 O 4 ), limonite (FeO[OH] • nH 2 O), and siderite (FeCO 3 ). The element also occurs as the sulfide, iron...
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meteorite
Book article from: The Columbia Encyclopedia, Sixth Edition
...Three general categories are used to classify meteorites. The siderites, or irons, are composed entirely of metal (chiefly nickel...of meteorites have been found weighing a ton or more each. Siderites weighing more than a ton have been discovered in Brazil...
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