What is Allanite used for?

Chemistry: (Ca, Ce, La, Y)2(Al, Fe)3(SiO4)3(OH), Calcium Cerium Lanthanum Yttrium Aluminum Iron Silicate Hydroxide. Uses: As a source of rare earth metals and mineral specimens.

Is allanite radioactive?

Allanite is one of the most common rare earth minerals; up to 20% of allanite’s weight could be composed of these rare earth elements, making allanite a potentially valuable ore. Because of these rare earth metals, especially thorium, which are frequently radioactive, allanite is frequently slightly radioactive.

Where is xenotime found?

Occurring as a minor accessory mineral, xenotime is found in pegmatites and other igneous rocks, as well as gneisses rich in mica and quartz.

Is thorite radioactive?

Thorite, (Th,U)SiO4, is a rare nesosilicate of thorium that crystallizes in the tetragonal system and is isomorphous with zircon and hafnon. It is the most common mineral of thorium and is nearly always strongly radioactive. It was named in 1829 to reflect its thorium content.


[KEY]How do you identify Allanite?[/KEY]

Allanite is usually black in color, but can be brown or brown-violet. It is often coated with a yellow-brown alteration product, likely limonite. It crystallizes in the monoclinic system and forms prismatic crystals. It has a Mohs hardness of 5.5–6 and a specific gravity of 3.5–4.2.


Does apatite react to acid?

During digestion of apatite with sulfuric acid to make phosphoric acid, hydrogen fluoride is produced as a byproduct from any fluorapatite content.


[KEY]What is amphibolite rock?[/KEY]

Amphibolite, a rock composed largely or dominantly of minerals of the amphibole group. The term has been applied to rocks of either igneous or metamorphic origin. In igneous rocks, the term hornblendite is more common and restrictive; hornblende is the most common amphibole and is typical of such rocks.


Is xenotime a mineral?

Xenotime, widely distributed phosphate mineral, yttrium phosphate (YPO4), though large proportions of erbium commonly replace yttrium), that occurs as brown, glassy crystals, crystal aggregates, or rosettes in igneous rocks and associated pegmatites, in quartzose and micaceous gneiss, and commonly in detrital material.

What is the hardness of barite?

The chemical formula for barite is BaSO4. It has a high specific gravity of 4.50 g/cm3. Its Mohs hardness is 3.0 to 3.5. Barite, which may be found in a variety of colors including yellow, brown, white, blue, gray, or even colorless, typically has a vitreous to pearly luster.

What is the meaning of xenotime?

: a mineral YPO4 that is a phosphate of yttrium occurring in usually brown or yellow tetragonal crystals and rolled grains and that often also contains thorium, erbium, cerium, or other elements (hardness 4–5, specific gravity 4.45–4.56)

Can you find uranium in nature?

Uranium occurs naturally in the Earth’s crust, water, air, and living organisms.

What type of rock is monazite?

Monazite is a rare phosphate mineral with a chemical composition of (Ce,La,Nd,Th)(PO4,SiO4). It usually occurs in small isolated grains, as an accessory mineral in igneous and metamorphic rocks such as granite, pegmatite, schist, and gneiss.

What is columbite ore?

Columbite, also called niobite, niobite-tantalite and columbate [(Fe, Mn)Nb. 2O. 6], is a black mineral group that is an ore of niobium. It has a submetallic luster and a high density and is a niobate of iron and manganese. This mineral group was first found in Haddam, Connecticut, in the United States.


[KEY]Is albite a gemstone?[/KEY]

Albite is used as a gemstone, albeit semi-precious. Albite is also used by geologists as it is identified as an important rock forming mineral. There is some industrial use for the mineral such as the manufacture of glass and ceramics.


Is albite a rock or mineral?

Albite, common feldspar mineral, a sodium aluminosilicate (NaAlSi3O8) that occurs most widely in pegmatites and felsic igneous rocks such as granites. It may also be found in low-grade metamorphic rocks and as authigenic albite in certain sedimentary varieties.

What is microcline feldspar?

Microcline is one of the most common feldspar minerals. The mineral occurs in feldspar-rich rocks, such as granite, syenite, and granodiorite. It is found in granite pegmatites and in metamorphic rocks, such as gneisses and schists.

How is chlorite formed?

Chlorite forms by the alteration of mafic minerals such as pyroxenes, amphiboles, biotite, staurolite, cordierite, garnet, and chloritoid. Chlorite can also occur as a result of hydrothermal alteration of any rock type, where recrystallization of clay minerals or alteration of mafic minerals produce chlorite.

Is Earth an element?

The rare-earth elements, also called the rare-earth metals or (in context) rare-earth oxides, or the lanthanides (though yttrium and scandium are usually included as rare-earths) are a set of 17 nearly-indistinguishable lustrous silvery-white soft heavy metals. Rare-earth element.

Hydrogen Caesium

Does apatite react to hydrochloric acid?

Apatite is acidulated with HCl to the stoichiometric level needed for generating dicalcium phosphate. The reaction product when mixed with ammonium sulphate sufficient to doubledecompose calcium chloride and dicalcium phosphate yields a nonhygroscopic product containing almost all phosphorus in the water-soluble form.

Which type of minerals do not react to HCl?

Non-carbonate minerals, especially silicates will not react to HCl.

Does chert fizz in acid?

Limestone fizzes in dilute hydrochloric (HCl) acid, because it is composed of the mineral calcite, CaC03. Some limestone contains chert, which is very, very hard silica (like flint). It typically weathers to brown on the surface and occurs in nodules and occasionally replaces fossil shells.


[KEY]Why is almandine garnet red?[/KEY]

Almandine Garnet Color Almandine garnet colors can range from pure red, reddish-orange and slightly purplish-red to dark, brownish-red. The unique deep red color of almandine is a direct result from the presence of iron.


What chakra is almandine garnet?

Almandine Garnet is associated with the First Chakra, the Base Chakra which is located at the base of the spine and radiates through the legs and feet. This is the grounding Chakra and deals with the health of the physical body. When out of balance, one may feel flighty and physically adrift.

What is the difference between amphibole and amphibolite?

Amphibolite (/æmˈfɪb. əˌlaɪt/) is a metamorphic rock that contains amphibole, especially hornblende and actinolite, as well as plagioclase feldspar. Amphibolite is a grouping of rocks composed mainly of amphibole and plagioclase, with little or no quartz. Amphibolite need not be derived from metamorphosed mafic rocks.

What is amphibolite protolith?

Amphibolites are often associated with other metamorphic rocks like quartzite, schist, marble, gneiss. These rocks represent different protoliths that were metamorphosed during the same mountain building episode. Stripes of metamorphic rocks like these are often next to one another in geological maps.

How is amphibolite used?

It is used as paving stones and as a veneer or facing on buildings (both for interior and exterior use). It is also used as crushed stone for the usual crushed stone applications such as road and railroad bed construction. In this application it is used locally, near the source of the amphibolite.

What is pyrochlore structure?

Pyrochlores are ceramics with the cubic fluorite-type structure, and the general chemical formula A2B2O7, where A is a 3+ cation (La3+, Nd3+, Gd3+, Sm3+, Y3+) B is a 4+ cation (e.g., Zr4+, Ti4+, Mo4+), and 1/8th of the oxygen positions are vacant. From: Encyclopedia of Electrochemical Power Sources, 2009.

What are phosphate minerals used for?

It is the major resource mined to produce phosphate fertilizers for the agriculture sector. Phosphate is also used in animal feed supplements, food preservatives, anti-corrosion agents, cosmetics, fungicides, ceramics, water treatment and metallurgy.

Does scheelite glow?

Scheelite’s intense fluorescence under SW UV light and X-rays can help distinguish it from other stones of similar appearance. Although they typically glow an intense bluish white or whitish blue, scheelites that contain some Mo can fluoresce a creamy yellow in SW.

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