Anthophyllite is an Amphibole (Hornblende) Amphibole defines an important group of dark-colored rock-forming inosilicate minerals composed of double chain SiO4 tetrahedra linked at the vertices and generally containing ions of iron and/ or magnesium in their structures. In chemical composition and general characteristics they are very similar to the pyroxenes and... amphibole Minerals are natural compounds formed through geological processes. The term mineral encompasses not only the materials chemical composition but also the mineral structures. Minerals range in composition from pure elements and simple salts to very complex silicates with thousands of known forms (organic compounds are usually excluded). The study... mineral: (Mg, Fe)₇Si₈O₂₂(OH)₂, General Name, Symbol, Number magnesium, Mg, 12 Series alkaline earth metals Group, Period, Block 2 (IIA), 3, s Density, Hardness 1738 kg/m³, 2.5 Appearance silvery white Atomic properties Atomic weight 24.305 amu Atomic radius (calc.) 150 pm (145 pm) Covalent radius 130 pm van der Waals radius... magnesium General Name, Symbol, Number iron, Fe, 26 Chemical series transition metal Group, Period, Block 8 (VIIIB), 4 , d Density, Hardness 7874 kg/m3, 4.0 Appearance lustrous metallic with a greyish tinge Atomic properties Atomic weight 55.845 amu Atomic radius (calc.) 140 (156) pm Covalent radius 125 pm van... iron The silicate minerals make up the the largest and most important class of rock-forming minerals. They are classified based on the structure of their silicate anion group. Subclasses: Nesosilicates Nesosilicates (or orthosilicates) have SiO4 tetrahedra that are isolated and connected by interstitial cations. Phenacite group Phenacite Willemite Olivine group... inosilicate Hydroxide is a functional group consisting of oxygen and hydrogen: -O−H It has a charge of 1-. The term hydroxyl group is used when the functional group -OH is counted as a substituent of an organic compound. Organic molecules containing a hydroxyl group are known as alcohols (CnH2n... hydroxide. Anthophyllite is In general, a polymorph is something that can exist in several states or forms. A polymorph can be: In biology, Dreissena polymorpha is the scientific name for the Zebra mussel. In materials science, a polymorph is a solid material which shares chemical composition with another material but is composed of... polymorphic with Cummingtonite or magnesium iron silicate hydroxide is a mineral with the chemical composition (Mg,Fe)7Si8O22(OH)2. It was originally discovered in Cummington, Massachusetts, hence the name. External Links Mineral Galleries Categories: Mineral stubs | Silicate minerals ... cummingtonite. It is a mineral of Metamorphic rock is the result of the transformation of a pre-existing rock type, the protolith, in a process called metamorphism, which means change in form, derived from the Greek words meta, change, and morphe, form. The protolith is subjected to extreme heat (>150 degrees Celsius) and pressure causing... metamorphic origin produced by the alteration of magnesium rich Igneous rocks are formed when molten rock (magma) cools and solidifies, with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks. This magma can be derived from either the Earths mantle or pre-existing rocks made molten by extreme... igneous rocks and impure For the European mountain range, see Dolomites Dolomite from Touissite, Morocco Dolomite is a mineral (formula CaMg(CO3)2) consisting of a calcium magnesium carbonate found in crystals and in beds as dolostone. A pure form of dolostone would be rare, however; it usually intergrades with limestone and is referred... dolomitic Limey shale overlaid by limestone. Cumberland Plateau, Tennessee Limestone is a sedimentary rock composed of the mineral calcite (calcium carbonate). The primary source of this calcite is usually marine organisms. These organisms secrete shells that settle out of the water column and are deposited on ocean floors as pelagic ooze... limestone. Thus it is found in Categories: Mineral stubs | Metamorphic rocks ... gneisses, Categories: Mineral stubs | Metamorphic rocks ... schists, and some Marble This page is about the metamorphic rock. For the game with little glass spheres - see marbles. Marble is metamorphosed limestone, composed of fairly pure calcite (a crystalline form of calcium carbonate, CaCO3). It is extensively used for sculpture, as a building material, and in many other applications. Faux marble... marbles. Anthophyllite also occurs as a retrograde metamorphic mineral derived from Ultramafic rocks are igneous rocks with very low silica content (less than 45%) and are composed of usually greater than 90% mafic minerals (dark colored, high magnesium and iron content). Ultramafic rocks are typical of the Earths mantle. Rock types include intrusive dunite and peridotite and rare volcanic komatiite... ultramafic rocks along with Serpentine Serpentine is a group of common rock-forming hydrous magnesium iron phyllosilicate ((Mg,Fe)3Si2O5(OH)4) minerals. In mineralogy, serpentine may refer to any of 20 minerals belonging to the serpentine group. Owing to admixture, these minerals are not always easy to individualize, and distinctions are not usually... serpentine. Some forms of anthophyllite are lamellar or fibrous and are used as Asbestos (Greek a-, not; sbestos, extinguishable) is a group of fibrous metamorphic minerals. The name is derived for its historical use in lamp Wicks; the resistance of asbestos to fire has long been exploited for a variety of purposes. It was used in fabrics such as Egyptian burial cloths and... asbestos.

References

• Mindat (http://www.mindat.org/min-254.html)
• Webmineral  (http://webmineral.com/data/Anthophyllite.shtml)
• Mineral galleries (http://mineral.galleries.com/minerals/silicate/anthophy/anthophy.htm)