???? Nickelin – Definition and Explanations

2023-07-21 01:31:03

Introduction

Nickelline

Nickeline – Silver Bar Mine, Cobalt, Ontario,Canada (6x4cm)

General Category Mineral Identification Mass (The term mass is used to designate two quantities attached to a…) form 134 g/mol Color (The color is the subjective perception that the eye has of one or more wave frequencies…) lead gray (Lead is a chemical element of the family of crystallogens, symbol Pb and…), copper (Copper is a chemical element with symbol Cu and atomic number 29. Copper…), black Crystal class and space group hexagonal bipyramidal, 6/ mmm Crystal system (A crystal system is a classification of crystals on the basis of their…) hexagonal Bravais lattice (In crystallography, a Bravais lattice is a regular distribution of points…) primitive hexagonal Cleavage (Cleavage is the ability of certain minerals to fracture along flat surfaces…) imperfect on [1010] et, [0001] Habitus Massive (The word massive can be used as:);Very rare crystals in twisted isoscelohedra Fracture (In traumatology, the term fracture designates by definition a solution of…) regular, conchoidal Mohs scale 5.5 Metallic luster Optical properties Line brown-black Transparency (A material or an object is qualified as transparent when it lets the…) opaque Other properties Density (The density or relative density of a body is the ratio of its density at…) 7.78 to 7.8 Fusibility 2 Solubility In aqua regia (Aqua regia (Latin, aqua regia, eau royale) is a mixture of acids…) Distinctive characters Magnetism (Magnetism is a physical phenomenon, through which forces manifest…) none Radioactivity (Radioactivity, a phenomenon which was discovered in 1896 by Henri Becquerel on…) none Main varieties Nickeline (nickeline is a mineral composed of nickel arsenide with the formula NiAs,…) General CAS No 27016-75-7
12795-30-1 EINECS No. 248-169-1 SMILES InChI Chemical properties Molecular formula AsNiNiAs Molar mass 133.615 ± 0.0004 g mol-1 SI & CNTP units, unless otherwise indicated.

Nickeline is a mineral composed of nickel arsenide (Nickel is a chemical element, symbol Ni and atomic number 28.) of formula NiAs, containing 43.9% arsenic (Arsenic is a chemical element of the family of pnictogens, symbol…) and 56.1% nickel. Small amounts of sulfur (Sulphur is a chemical element of the chalcogen family, symbol S and …), iron (Iron is a chemical element, symbol Fe and atomic number 26. It is …) and cobalt (Cobalt is a chemical element, symbol Co and atomic number 27 and …) are usually present; arsenic can be significantly replaced by antimony (Antimony is a chemical element of the family of pnictogens, symbol Sb…). Nickeline forms an isomorphic series with breithauptite. Because of its copper-red color the ore is often called “copper-nickel”: the German equivalent “Kupfernickel” was used as early as 1694. Associated ores include: arsenopyrite, barite, silver (Silver or silver metal is a chemical element with the symbol Ag — du…), cobaltine, pyrrhotite, pentlandite, chalcopyrite (Chalcopyrite is a mineral composed of double sulphide (35% by mass), copper…), breith auptite and macherite. In contact with air (Air is the mixture of gases constituting the atmosphere of the Earth. It is odorless and…) humid nickeline can give a pseudomorphosis by coating annabergite (Annabergite is a mineral species, composed of hydrated arsenate…) (green arsenate (Green is a complementary color corresponding to light which has a wavelength…) of nickel).

Inventor and etymology

Described by François Sulpice Beudant in 1832. In allusion to its chemical composition (nickel)

Structure

Nickeline has a hexagonal structure, space group P 63/mmc, hardness (There are different definitions of hardness: for a solid (mineral or metal) and…) of the order of 5-5½ on the Mohs scale (The Mohs hardness scale was invented in 1812 by the German mineralogist Friedrich Mohs…). This is the hexagonal equivalent of the galena structure (Galena is a mineral species composed of lead sulphide with the formula PbS…).

The occupied octahedra share faces: this arrangement (The notion of arrangement is used in probabilities, and in particular for…) is rare among ionic structures, but in nickeline each metallic atom (An atom (from the Greek ατομος, atomos, “that cannot be…) metallic is close not only to the non-metal (The non-metals form a chemical series of the periodic table which groups together the…), but also other metallic atoms, with which it forms metallic bonds An alternative description of the structure can be made by placing the nickel at the vertices of a primitive hexagonal network and the arsenic at the center of the trigonal prisms formed by the nickel.

Gytology

Nickeline is formed by hydrothermal action on ultramafic rocks and on associated deposits and can be formed by replacement of nickel-copper sulphides (replacement of pentlandite and association with copper sulpho-arsenides), or by metasomatosis of ultramafic rocks devoid of sulphides, where sulphur, as well as arsenic and carbonates, is brought by metasomatic fluids. The result is typically an association that includes millerite, heazelwoodite, pentlandite and pyrite (Pyrite is a mineral species composed of iron sulphide, with the formula FeS2…). Significant deposits of nickeline and associated minerals are found in Ontario and Australia (Australia (officially the Commonwealth of Australia) is a country of…).

Associated minerals

Annabergite, heazelwoodite, millérite, pentlandite, pyrite.
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