Orthoclase, a potassium-aluminum silicate, is an Alkali feldspar mineral that forms in relatively moderate temperature for an igneous mineral, between 500 and 900 degrees centigrade. What is the chemical formula for Moonstone?
Rock-forming Minerals (Deer, Howie & Zussmann), 2nd ed., 4A. Mineralogical Magazine 33 (1962), 263. Orthoclase's chemical formula is identical to that of Microcline (KAlSi 3 O 8 ), but microcline forms at lower temperatures (usually below 400 degrees Celsius).
Moonstone is a variety of the feldspar-group mineral orthoclase. ((Na,K)AlSi 3 O 8) How Is The Moonstone Formed? Chemical Properties of Orthoclase gives us information about the mineral's chemical composition. It’s composed of two feldspar minerals, orthoclase and albite. Orthoclase is … It is a type of potassium feldspar, also known as K-feldspar.The gem known as moonstone (see below) is largely composed of orthoclase. This gemstone would help you catch what is really needed in the world, and make it come true. Feldspars are further divided into … It would make you have more innovative and unorthodox ideas. Orthoclase is a rare gemstone that belongs to the feldspar group, which also includes moonstone, amazonite, spectrolite and labradorite.Therefore, orthoclase is sometimes also called "K-spar". At first, the two minerals are intermingled. It makes up approximately 60-percent of these igneous rocks and gives granite its porphyritic texture (a mix of large grains with intersticial smaller grains). General Orthoclase Information : Chemical Formula: KAlSi3O8 : Composition: Molecular Weight = 278.33 gm Potassium 14.05 % K 16.92 % K 2 O: Aluminum 9.69 % Al 18.32 % Al 2 O 3: Silicon 30.27 % Si 64.76 % SiO 2: Oxygen 45.99 % O: 100.00 % 100.00 % = TOTAL OXIDE
Mineral Data, Mineralienatlas Lexikon, Orthoclase. Orthoclase, or orthoclase feldspar (endmember formula K Al Si 3 O 8), is an important tectosilicate mineral which forms igneous rock.The name is from the Ancient Greek for "straight fracture," because its two cleavage planes are at right angles to each other. Orthoclase gemstones are typically champagne yellow, golden yellow … Orthoclase definition, a common white or pink mineral of the feldspar group, KAlSi3O8, having two good cleavages at right angles, and found in silica-rich igneous rocks: used in … Orthoclase is a gemstone that has a meaning and properties of broadening the owner's horizon.
Feldspar is the principle ground mineral of granite, monzonite and syenite.