Clintonite is a group of micaceous minerals known as the brittle micas. Like the micas and chlorites, they are monoclinic in crystallization and have a perfect cleavage parallel to the flat surface of the plates or scales, but differ markedly from these in the brittleness of the laminae; they are also considerably harder, the hardness of chioritoid being as high as 6.5 on Mohs scale. They differ chemically from the micas in containing less silica and no alkalis, and from the chlorites in containing much less water; in many respects they are intermediate between the micas and chlorites. This article is about minerals in the geologic sense; for nutrient minerals see dietary mineral; for the band see Mineral (band). ... rock with mica Mica sheet mica flakes The mica group of minerals includes several closely related materials having highly perfect basal cleavage. ... Chlorite is a group of phyllosilicate minerals often classified as clays. ... Cleaveage, in mineralogy, is the tendency of crystalline materials to split along definite planes, creating smooth surfaces, of which there are several named types: Basal cleavage: cleavage parallel to the base of a crystal, or to the plane of the lateral axes. ... In materials science, hardness is the characteristic of a solid material expressing its resistance to permanent deformation. ... Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer. ... The chemical compound silicon dioxide, also known as silica, is the oxide of silicon, chemical formula SiO2. ... For the battery, see alkaline battery The word alkali can mean:- In chemistry, an alkali is a specific type of base, formed as a carbonate, hydroxide or other ionic salt of an alkali metal or alkali earth metal element. ...

The following species are distinguished: Margarite is a basic calcium aluminium silicate, H₂CaAl₄SiIO₁₁, and is classed by some authors as a lime-mica. It forms white pearly scales, and was at first known as pearl-mica and afterwards as margarite, from uap/aptrfll, a pearl. It is a characteristic associate of corundum, of which it is frequently an alteration product (facts which suggested the synonymous names corundellite and emerylite), and is found in the emery deposits of Asia Minor and the Greek Archipelago, and with corundum at several localities in the United States. General Name, Symbol, Number calcium, Ca, 20 Chemical series alkaline earth metals Group, Period, Block 2, 4, s Appearance silvery white Atomic mass 40. ... General Name, Symbol, Number aluminium, Al, 13 Chemical series poor metals Group, Period, Block 13, 3, p Appearance silvery Atomic mass 26. ... In chemistry, a silicate is a compound consisting of silicon and oxygen (SixOy), one or more metals, and possibly hydrogen. ... Lime has several meanings: Look up Lime in Wiktionary, the free dictionary Lime (mineral) - a group of calcium compounds and minerals in which they predominate, including: Limestone Agricultural lime - a mineral soil additive Calcium oxide (also quicklime) - a chemical compound Calcium hydroxide (also slaked lime) - a chemical compound Lime (fruit... Japanese pearl diver A pearl is a hard, rounded object produced by certain mollusks, primarily oysters. ... Corundum is the crystalline form of aluminium oxide and one of the rock-forming minerals. ... Emery can refer to the following topics: Emery (mineral) Emery Air Freight Emery (band) Emery, Wisconsin Emery County, Utah This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... Anatolia (Greek: ανατολη anatole, rising of the sun or East; compare Orient and Levant, by popular etymology Turkish Anadolu to ana mother and dolu filled), also called by the Latin name of Asia Minor, is a region of Southwest Asia which corresponds today to the Asian portion of Turkey. ... An archipelago is a landform which consists of a chain or cluster of islands. ...

Seybertite, Brandisite and Xanthophyllite are closely allied species consisting of basic magnesium, calcium and aluminium silicate, and have been regarded as isomorphous mixtures of a silicate (H₂CaMg₄SiaO₁₁) and an aluminate (HICaMgAl1O₁₁). Seybertite (the original clintonite) occurs as reddish-brown to copper-red, brittle, foliated masses in metamorphic limestone at Amity, New York; brandisite as yellowish-green hexagonal prisms in metamorphic limestone in the Fassathal, Tirol; xanthophyllite as yellow folia and as distinct crystals (waluewite) in chloritic schists in the Urals. General Name, Symbol, Number magnesium, Mg, 12 Chemical series alkaline earth metals Group, Period, Block 2, 3, s Appearance silvery white Atomic mass 24. ... Limey shale overlaid by limestone. ... State nickname: Empire State Other U.S. States Capital Albany Largest city New York City Governor George Pataki (R) Official languages None (English is de facto) Area 141,205 km² (27th)  - Land 122,409 km²  - Water 18,795 km² (13. ... Categories: Mineral stubs | Metamorphic rocks ... The Ural Mountains, (Russian: Ура́льские го́ры = Ура́л) also known simply as the Urals, are a mountain range that run roughly north and south through western Russia. ...

Chioritoid has the formula H₂(Fe,Mg)Al1SiO₇. It forms tabular crystals and scales, with indistinct hexagonal outlines, which are often curved or bent and aggregated in rosettes. The color is dark grey or green; a characteristic feature is the pleochroism, the pleochroic colors varying from yellowish-green to indigo-blue. Hardness is 6.5, and specific gravity is 3.4 - 3.6. It occurs as isolated scales scattered through schistose rocks and phyllites of dynamo-metamorphic origin. The ottrelites of the phyllites and ottrelite-schists of Ottrez and other localities in the Belgian Ardennes is a manganiferous variety of chloritoid, but owing to enclosed impurities the analyses differ widely from those of typical chioritoid. Pleochroism is an optical phenomenon where due to double refraction of light by a colored gem or crystal, the light is divided into two paths which are polarized at a 90° angle to each other. ... In materials science, hardness is the characteristic of a solid material expressing its resistance to permanent deformation. ... Relative density (also known as specific gravity) is a measure of the density of a material. ... Phyllite Phyllite is a type of metamorphic rock primarily composed of quartz, sericite mica, and chlorite; the rock is intermediate in grade between slate and mica schist. ... Metamorphism can be defined as the mineralogical, chemical and crystallographic changes in a solid-state rock, i. ... The Ardennes is a region of extensive forests and rolling hill country, primarily in Belgium and Luxembourg, but stretching into France (lending its name to the Ardennes département and the Champagne-Ardenne région). ... General Name, Symbol, Number manganese, Mn, 25 Chemical series transition metals Group, Period, Block 7, 4, d Appearance silvery metallic Atomic mass 54. ...

Contrary to popular belief, it's name was not derived from United States President Bill Clinton. William Jefferson Clinton (born William Jefferson Blythe III on August 19, 1946) was the 42nd President of the United States from 1993 to 2001. ...

This article incorporates text from the 1911 Encyclopædia Britannica, which is in the public domain. Supporters contend that the Eleventh Edition of the Encyclopædia Britannica (1911) represents the sum of human knowledge at the beginning of the 20th century; indeed, it was advertised as such. ... The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. ...