Magnesite

magnasite
Magnesite is a mineral with the chemical formula MgCO 3 (magnesium carbonate).wikipedia
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Magnesium carbonate

nesquehonitechalkMgCO 3
Magnesite is a mineral with the chemical formula MgCO 3 (magnesium carbonate).
The most common magnesium carbonate forms are the anhydrous salt called magnesite (MgCO 3 ) and the di, tri, and pentahydrates known as barringtonite (MgCO 3 ·2 H 2 O), nesquehonite (MgCO 3 ·3 H 2 O), and lansfordite (MgCO 3 ·5 H 2 O), respectively.

Magnesium

MgMg 2+ Mg2+
Magnesite is a mineral with the chemical formula MgCO 3 (magnesium carbonate).
It is found in large deposits of magnesite, dolomite, and other minerals, and in mineral waters, where magnesium ion is soluble.

Talc carbonate

talc-carbonation
Magnesite can be formed via talc carbonate metasomatism of peridotite and other ultramafic rocks.
The term refers to the two most common end-member minerals found within ultramafic rocks which have undergone talc-carbonation or carbonation reactions: talc and the carbonate mineral magnesite.

Ultramafic rock

ultramaficultrabasicultramafic rocks
Magnesite occurs as veins in and an alteration product of ultramafic rocks, serpentinite and other magnesium rich rock types in both contact and regional metamorphic terrains.
Often thick, magnesite-calcrete caprock, laterite and duricrust forms over ultramafic rocks in tropical and subtropical environments.

Metamorphic reaction

reactionmetamorphic activitymetamorphic reactions
Magnesite can also be formed via the carbonation of magnesium serpentine (lizardite) via the following reaction:

Dolomite (mineral)

dolomitedolomiticcalcium magnesium carbonate
Magnesite can also be formed by way of metasomatism in skarn deposits, in dolomitic limestones, associated with wollastonite, periclase, and talc.
Reproducible, inorganic low-temperature syntheses of dolomite and magnesite were published for the first time in 1999.

Carbonate minerals

carbonate mineralcarbonatecarbonates

Screed

clay floorlaser screedmagnesite screed
Magnesite can also be used as a binder in flooring material (magnesite screed).

Carbon sequestration

sequestrationsequesteredsequester
The low-temperature formation of magnesite might well be of significance toward large-scale carbon sequestration.
Researchers from British Columbia, developed a low cost process for the production of magnesite, also known as magnesium carbonate, which can sequester CO 2 from the air, or at the point of air pollution, e.g. at a power plant.

Refractory

refractoriesrefractory brickrefractory material
Large quantities of magnesite are burnt to make magnesium oxide: an important refractory material used as a lining in blast furnaces, kilns and incinerators.
For the first half of the twentieth century, the steel making process used artificial periclase (roasted magnesite) as a furnace lining material.

Turquoise

turqoiseturquoise gemtourquoise
Magnesite beads can be dyed into a broad spectrum of bold colors, including a light blue color that mimics the appearance of turquoise.
The most common imitation of turquoise encountered today is dyed howlite and magnesite, both white in their natural states, and the former also having natural (and convincing) black veining similar to that of turquoise.

Mineral

mineralsmineral depositsaccessory mineral
Magnesite is a mineral with the chemical formula MgCO 3 (magnesium carbonate).

Carbon

Ccarbonaceouscarbon atom
Magnesite is a mineral with the chemical formula MgCO 3 (magnesium carbonate).

Oxygen

OO 2 molecular oxygen
Magnesite is a mineral with the chemical formula MgCO 3 (magnesium carbonate).

Iron

FeFe 2+ Fe(III)
Iron, manganese, cobalt and nickel may occur as admixtures, but only in small amounts.

Manganese

Mnmanganese oreMn 2+
Iron, manganese, cobalt and nickel may occur as admixtures, but only in small amounts.

Cobalt

CoCo 2+ bush sickness
Iron, manganese, cobalt and nickel may occur as admixtures, but only in small amounts.

Nickel

NiNi 2+ Nickel (Ni)
Iron, manganese, cobalt and nickel may occur as admixtures, but only in small amounts.

Serpentinite

serpentineserpentinizationserpentinized
Magnesite occurs as veins in and an alteration product of ultramafic rocks, serpentinite and other magnesium rich rock types in both contact and regional metamorphic terrains.

Metamorphic rock

metamorphicmetamorphosedmetamorphic rocks
Magnesite occurs as veins in and an alteration product of ultramafic rocks, serpentinite and other magnesium rich rock types in both contact and regional metamorphic terrains.

Cryptocrystalline

cryptocrystalpolycrystalline
These magnesites are often cryptocrystalline and contain silica in the form of opal or chert.

Opal

black opalfire opalopals
These magnesites are often cryptocrystalline and contain silica in the form of opal or chert.

Chert

Chertychert miningChert rock
These magnesites are often cryptocrystalline and contain silica in the form of opal or chert.

Regolith

megaregolithlunar dustlunar soil
Magnesite is also present within the regolith above ultramafic rocks as a secondary carbonate within soil and subsoil, where it is deposited as a consequence of dissolution of magnesium-bearing minerals by carbon dioxide in groundwaters.

Subsoil

substratasub soilsub-soil
Magnesite is also present within the regolith above ultramafic rocks as a secondary carbonate within soil and subsoil, where it is deposited as a consequence of dissolution of magnesium-bearing minerals by carbon dioxide in groundwaters.