hematite

he·ma·tite

H0141200 (hē′mə-tīt′)n. A black or blackish-red to brick-red mineral, essentially Fe₂O₃, the chief ore of iron.

[Middle English emathite, ematites, from Latin haematītēs, from Greek (lithos) haimatītēs, bloodlike (stone), from haima, haimat-, blood.]

he′ma·tit′ic (-tĭt′ĭk) adj.

hematite

(ˈhɛmətaɪt) or

haematite

n (Minerals) a red, grey, or black mineral, found as massive beds and in veins and igneous rocks. It is the chief source of iron. Composition: iron (ferric) oxide. Formula: Fe2O3. Crystal structure: hexagonal (rhombohedral). Also called: iron glance [C16: via Latin from Greek haimatitēs resembling blood, from haima blood] hematitic, haematitic adj

he•ma•tite

(ˈhi məˌtaɪt)

n. a mineral, ferric oxide, Fe₂O₃, occurring in brilliant black crystals and in earthy masses: the principal ore of iron. [1535–45; < Latin haematītēs bloodstone < Greek haimatitēs (lithós) bloodlike (stone). See hemato-, -ite¹] he`ma•tit′ic (-ˈtɪt ɪk) adj.

he·ma·tite

(hē′mə-tīt′) A reddish-brown to silver-gray mineral consisting of iron oxide. Hematite occurs in igneous, metamorphic, and sedimentary rocks and is the most abundant iron ore. It is usually slightly magnetic.

hematite

iron oxide

Thesaurus

Noun

hematite - the principal form of iron ore; consists of ferric oxide in crystalline form; occurs in a red earthy formhaematiteemery - a hard grey-black mineral consisting of corundum and either hematite or magnetite; used as an abrasive (especially as a coating on paper)iron ore - an ore from which iron can be extracted

Translations

ematite

hematite

(hĕm`ətīt), mineral, an oxide of iron, Fe₂O₃, containing about 70% metal, occurring in nature in red to reddish-brown earthy masses and in steel-gray to black crystalline forms. Hematite that has a metallic luster is called specular hematite, or specular iron. The red powdered hematite is used as a pigment (ocherocher
, mixture of varying proportions of iron oxide and clay, used as a pigment. It occurs naturally as yellow ocher (yellow or yellow-brown in color), the iron oxide being limonite, or as red ocher, the iron oxide being hematite.
..... Click the link for more information. ) and as rouge in polishing. Hematite is the most important ore of iron. Extensive and richly productive deposits occur in the Lake Superior region (Michigan, Minnesota, and Wisconsin) and the Birmingham district (Alabama). The mineral is widely distributed throughout the world and is responsible for the red coloration of many sedimentary rocks. See limonitelimonite
or brown hematite
, yellowish to dark brown mineral, a hydrated oxide of iron, FeO(OH)·nH₂O, occurring commonly in deposits of secondary origin, i.e., those formed by the alteration of minerals containing iron.
..... Click the link for more information. .

Hematite

a widely distributed ferrous mineral, Fe₂0₃, containing up to 70 percent iron. Hematite is crystallized in a trigonal system. Its crystals are steel gray with a semimetallic shine. Depending on the mineral aggregate structures and the crystallic concretion shapes, a distinction is made among (1) hematite iron glance (macrocrystalline concretions); (2) ferrous mica (flaky aggregates); (3) ferrous rosette (crystal concretions reminiscent of corollas of dog rose); (4) red ironstone (dense red microcrystallic units); (5) kidney ore (red dense reniform conglomerations); and (6) martite (dense or porous ore formations). On the mineralogical scale, the hardness is 5.5-6; the density, 5,260 kg per cu m. The powder is cherry red in color. The melting point is 1594° C.

Together with magnetite, geothite, and quartz, hematite is formed in deposits of different genetic types and in various rocks, when the oxidizing potential of the medium is sufficiently high. Hematite ores are ferrous ores of great importance, being used for smelting cast iron and steel. Iron content in solid hematite ores fluctuates from 50 percent to 65 percent. The largest deposits are connected with the oldest Precambrian ferriferous quartzites (jaspilites).

In the USSR the Krivoi Rog hematite ore deposit (in the Ukrainian SSR), the Kursk Magnetic Anomaly, and the Urals and Siberian deposits are well known. The biggest deposits abroad are situated near Lake Superior, Birmingham, and elsewhere in the USA; in the state of Minas Gerais in Brazil; and in Canada (Labrador), India (states of Bihar, Orissa, and Madhya Pradesh), and several countries of Africa.

hematite

[′hē·mə‚tīt] (mineralogy) Fe₂O₃ An iron mineral crystallizing in the rhombohedral system; the most important ore of iron, it is dimorphous with maghemite, occurs in black metallic-looking crystals, in reniform masses or fibrous aggregates, or in reddish earthy forms. Also known as bloodstone; red hematite; red iron ore; red ocher; rhombohedral iron ore.

hematite

he·ma·tite

hematite

haematite

he•ma•tite

he·ma·tite

hematite

hematite

hematite

Hematite

hematite

hematite

Synonyms for hematite

noun the principal form of iron ore

Synonyms

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