argentite. argentite (silver glance) Ag 2 S, ore mineral for silver; sp. gr. 7.2–7.4; hardness 2.0–2.5 (can be cut with a knife); cubic; black and opaque; slimy black streak; metallic lustre; crystals commonly cubes or octahedra, but can be massive; cleavage poor, cubic; occurs in hydrothermal veins in association with native silver and as ...

Other articles where argentite is discussed: acanthite: Argentite is the high-temperature form of acanthite. Like several other sulfides, selenides, and tellurides of silver and copper, argentite forms isometric crystals at high temperatures. Upon cooling these crystals invert from isometric (cubic) to monoclinic structures while remaining unchanged in external …

Argentite, a mineral which belongs to the galena group, is cubic silver sulfide (Ag 2 S). It is occasionally found as uneven cubes and octahedra, but more often as dendritic or …

(d) Argentite. View Solution. Q2. Match the column (I) and (II) and select the correct answer using the codes given below. Column-I: Column-II (a) Argentite (1) Halide ore of magnesium (b) Cuprite (2) Carbonate ore of iron (c) Siderite (3) Oxide ore of copper (d) Carnallite (4) Sulphide ore of silver:

argentite as small crystals growing on the starting-alloy sample. To our knowledge, this is the fust report of either the hydrothermal synthesis of millimeter-scale gold crystals or the simultaneous deposition of electrum and argentite from sulfide media. EXPERIMENTAL Acid systems The acid solutions investigated were 36N and l8N

Total 100.0. 99.9 100.00. (1) Guanajuato, Mexico; by electron microprobe. (2) Santa Lucia mine, La Luz, Guanajuato, Mexico; by electron microprobe. (3) Ag2S. Polymorphism & …

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Total 100.0. 99.9 100.00. (1) Guanajuato, Mexico; by electron microprobe. (2) Santa Lucia mine, La Luz, Guanajuato, Mexico; by electron microprobe. (3) Ag2S. Polymorphism & Series: The high-temperature cubic form ("argentite") inverts to acanthite at about 173 C; below this temperature acanthite is the stable phase and forms directly ...

Formula Ag2S Crystal System Isometric Crystal Habit Blocky, Skeletal, Arborescent Cleavage Poor, Poor, None Luster Metallic Color black, lead gray

Argentite. Argentite is the high-temperature form of the mineral Acanthite, and it crystallizes in the isometric system. However, Argentite cannot exist at normal temperatures, and converts to Acanthite. All specimens labelled as Argentite are really Acanthite pseudomorph s after Argentite.

Argentite: Mineral information and data on mindat. Learn about the properties, occurrence and uses of this rare and valuable silver sulphide mineral. Compare it with acanthite, its low-temperature modification, and find out …

This is a beautiful thumbnail-sized delicate tree of acanthite crystals (pseudomorphs after argentite). The crystals are sharp, well-articulated and have great lustre for Imiter acanthites. Sits perfectly. The second photo is a "'s-eye view" showing the cross-section with the crystal branches intersecting at 90 degrees, Gorgeous ...

Argentite is a name applied to one polymorph (meaning many shapes) of Ag2S. Acanthite and argentite have the same chemistry, Ag2S, but different structures. Argentite has an …

The finds at Imiter (Africa's largest silver mine) in recent years have placed it among the world's best localities for crystallized acanthite. Although these crystals formed as argentite, argentite is not stable below 179C, at which point it changes to monoclinic acanthite. The specimens are acanthite pseudomorphs after argentite ...

ARGENTITE definition: a dark grey mineral that consists of silver sulphide, usually in cubic crystalline... | Meaning, pronunciation, translations and examples in American English

Argentite definition, a dark lead-gray sectile mineral, silver sulfide, Ag2S, occurring in crystals and as formless aggregates: an important ore of silver. See more.

The unit cell of argentite. In mineralogy, argentite (from the Latin argentum, silver) is cubic silver sulfide (Ag 2 S), which can only exist at temperatures above 173 °C, [1] 177 °C [2] or 179 °C. [3] When it cools to ordinary temperatures it turns into its monoclinic polymorph, acanthite. [2] [3] Argentite belongs to the galena group.

Argentite, a mineral which belongs to the galena group, is cubic silver sulfide (Ag 2 S). It is occasionally found as uneven cubes and octahedra, but more often as dendritic or earthy masses, with a blackish lead-grey color and metallic lustre. The cubic cleavage, which is so prominent a feature in galena, here present only in traces.

The mineral was mentioned so long ago as 1529 by G. Agricola, but the name argentite (from the Lat. argentum, "silver") was not used till 1845 and is due to W. von Haidinger. Old names for the species are Glaserz, silver-glance and vitreous silver. A cupriferous variety, from Jalpa in Tabasco, Mexico, is known as jalpaite.

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Argentite definition: a dark grey mineral that consists of silver sulphide, usually in cubic crystalline... | Meaning, pronunciation, translations and examples

Argentite is an ore of silver, it is a cubic silver sulphide i.e, Ag 2 S. It contains about 87 % silver. It forms blackish-grey masses or coating with luster of metal and shinny black Streak. The argentite crystal after cooling converted into monoclinic form from cubic without change in external appearance. Silver is extracted from argentite ...

α-Argentite mineral data, information about α-Argentite, its properties and worldwide locations.

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View Solution. Q 2. Find the number of native ores out of given ores. Pyrolusite, Chromite, Siderite, Cassiterite, Calamine, Argentite, Lime stone, Chalcopyrite. View Solution. Q 3. In cyanide extraction process of silver from argentite ore, the oxidizing and reducing agents are respectively. View Solution.

Acanthite is a low-temperature hydrothermal mineral. It can form from inversion of argentite, a mineral that forms in higher temperature hydrothermal deposits. ONEIDA COUNTY: Acanthite occurs with gold, silver and other silver minerals in the Lynn massive sulfide deposit. Galena, sphalerite, and chalcopyrite are the major ore minerals in this …

The name "argentite" sometimes also refers to pseudomorphs of argentite: specimens of acanthite which still display some of the outward signs of the cubic crystal form, even though their actual crystal structure is monoclinic due to the lower temperature. This form of acanthite is occasionally found as uneven cubes and octahedra, but more …

Argentite is a name applied to one polymorph (meaning many shapes) of Ag 2 S. Acanthite and argentite have the same chemistry, Ag 2 S, but different structures. Argentite has an isometric structure and is only stable at temperatures above 173 degrees Celsius and if cooling from a melt, will form isometric crystals such as cubes, octahedrons ...

Similar words for Argentite. Definition: noun. a valuable silver ore consisting of silver sulfide (Ag2S).

Silver. Silver is an element with the chemical symbol Ag and atomic number 47. Opaque and bright silvery white with a slightly pink tint, it readily tarnishes to either gray or black. Natural crystals of silver are uncommon, but when found they are cubic, octahedral, or dodecahedral. It is usually found in granular habit and as wiry, branching ...

The Mineral acanthite. Acanthite is composed mostly of silver, and is its most important ore . Acanthite and Argentite are usually grouped together in mineral guides as one mineral. However, they are scientifically recognized as two unique minerals, even though they are composed of the same substance. They only differ in crystal structure.

argentite. Quick Reference. A sulphide ore of silver, Ag 2 S. It crystallizes in the cubic system but most commonly occurs in massive form. It is dull grey-black in colour but bright when first cut and occurs in veins associated with other silver minerals. Important deposits occur in Mexico, Peru, Chile, Bolivia, and Norway.

Acanthite, ac, is the only Ag 2 S species directly observable in nature, as it is the only silver sulphide stable under surface conditions. Its paramorph argentite is only …

Argentite is stable above 179 C. Acanthite is stable below 179 deg. C. Acanthite, Ag 2 S, crystallizes in the monoclinic system and is the stable form of silver sulfide below 173 °C. Argentite is the stable …

Argentite. Argentite is the high-temperature form of the mineral Acanthite, and it crystallizes in the isometric system. However, Argentite cannot exist at normal temperatures, and …