For the plant structure, see Spore The term spore has several different meanings in biology. ...

Diaspore from Slovakia

Diaspore is a native aluminium hydroxide, AlO(OH), crystallizing in the orthorhombic system and isomorphous with goethite and manganite. It occurs sometimes as flattened crystals, but usually as lamellar or scaly masses, the flattened surface being a direction of perfect cleavage on which the luster is markedly pearly in character. It is colorless or greyish-white, yellowish, sometimes violet in color, and varies from translucent to transparent. It may be readily distinguished from other colorless transparent minerals with a perfect cleavage and pearly luster, like mica, talc, brucite, and gypsum by its greater hardness of 6.5 - 7. The specific gravity is 3.4. When heated before the blowpipe it decrepitates violently, breaking up into white pearly scales. Image File history File links Kryšt. ... Image File history File links Kryšt. ... In crystallography, the orthorhombic crystal system is one of the 7 lattice point groups. ... Goethite is a hydrated iron oxide, HFeO2 or Fe3+O(OH) (known as lepidocrocite). ... Manganite is a mineral consisting of manganese oxide hydroxide, MnO(OH), crystallizing in the orthorhombic system and isomorphous with diaspore and goethite. ... For the file system called Lustre, see Lustre (file system) Lustre (American English: luster) is a description of the way light interacts with the surface of a crystal, rock or mineral. ... rock with mica Mica sheet mica flakes The mica group of minerals includes several closely related materials having highly perfect basal cleavage. ... Talc block Talc is a mineral composed of hydrated magnesium silicate with the chemical formula H2Mg3(SiO3)4 or Mg3Si4O10(OH)2. ... Brucite is the mineral form of magnesium hydroxide, with the chemical formula Mg(OH)2. ... Gypsum is a very soft mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4·2H2O. // Chemical structure Gypsum from New South Wales, Australia Heating gypsum above approximately 150°C (302°F) partially dehydrates the mineral by driving off exactly 75% of the water contained in its chemical structure. ...

The mineral occurs as an alteration product of corundum or emery and is found in granular limestone and other crystalline rocks. Well-developed crystals are found in the emery deposits of the Urals and at Chester, Massachusetts, and in kaolin at Schemnitz in Hungary. If obtainable in large quantity, it would be of economic importance as a source of aluminium. 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. ... Limey shale overlaid by limestone. ... 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. ... State nickname: Bay State Other U.S. States Capital Boston Largest city Boston Governor Mitt Romney (R) Official languages English Area 27,360 km² (44th)  - Land 20,317 km²  - Water 7,043 km² (25. ... Kaolin Kaolinite (Aluminium Silicate Hydroxide) Kaolinite is a mineral with the chemical composition Al2Si2O5(OH)4. ...

The chemical compound aluminium hydroxide is the major component of the mineral gibbsite, which itself is a component of the composite rock bauxite. Aluminium hydroxide is used as an antacid in the treatment of heartburn or acid indigestion. Aluminium hydroxide can also be used as a base. A chemical compound is a chemical substance formed from two or more elements, with a fixed ratio determining the composition. ... Aluminium hydroxide, Al(OH)3, is the most stable form of aluminium in normal conditions. ... This article is about minerals in the geologic sense; for nutrient minerals see dietary mineral; for the band see Mineral (band). ... Gibbsite, Al(OH)3, is an important ore of aluminium and is one of three minerals that make up the rock bauxite. ... Bauxite Bauxite is a naturally occurring, heterogeneous material composed primarily of one or more aluminium hydroxide minerals, plus various mixtures of silica, iron oxide, titania, aluminosilicate, and other impurities in minor or trace amounts. ... An antacid is any substance that counteracts stomach acidity. ... Acid indigestion is a type of indigestion involving an excess of hydrochloric acid in the stomach. ...

Other names for Diaspore

• Diasporit
• Diasporita
• Diasporite
• Diasporogelit
• Diasporogelita
• Diasporogelite
• Empholit
• Empholita
• Empholite
• Kayserit
• Kayserita
• Kayserite
• Tanatarit
• Tanatarita
• Tanatarite

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, in many ways, the sum of knowledge at the beginning of the 20th century. ... 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. ...