Orthoclase mineral is a silicate of potassium and aluminum, belonging to the Feldspar group. It has the same composition as microcline, but is stable at slightly higher temperatures. It occurs as prismatic, sometimes flat-sided crystals, but in rocks it is usually anhedral. It may be perfectly transparent and yellow or almost colorless, but it ...
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Sep 17, 2024 · Ortoklas Umum Kategori Mineral silikat Rumus (unit berulang) KAlSi 3 O 8 Sistem kristal Monoklinik (2/m) kelompok ruang C2/m Identifikasi Warna Jernih, kehijauan, kuning keabu-abuan, putih, merah muda Perawakan Dapat berupa anhedral atau euhedral.Butiran
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Orthoclase does not have striations on its cleavage plane, and the faces appear smooth. Crystal System: Orthoclase has a monoclinic crystal system, while plagioclase has a triclinic crystal system. Chemical Composition: The chemical formula of orthoclase is KAlSi3O8, while plagioclase has a chemical formula of NaAlSi3O8–CaAl2Si2O8.
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5 days ago · The mineral composition of most feldspars can be expressed in the ternary form including albite, orthoclase, and anorthite. The minerals of which composition is based primarily on the solid solution range between albrite and anorthite is what is known as the plagioclase feldspars while those between albrite and orthoclase or mono line are what …
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Mar 30, 2015 · Orthoclase is often confused with quartz - try looking for cloudy patches on individual crystals in plain polarized light which indicate weathering of the crystal. Occurrence: Found in granite, granodiorite, syenite, and other felsic rocks. Also found in arkoses and certain contact and regional metamorphic rocks.
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Jan 26, 2024 · Orthoclase is a type of feldspar that’s known for its beautiful crystals. It’s mainly made up of potassium, aluminum, and silicate, which give it some interesting properties. This mineral can be found in a range of colors, from colorless and white to shades of pink and red. The variety in colors of orthoclase is due to the different amounts ...
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Jul 13, 2001 · The thermal diffusivity of quartz, orthoclase, and sanidine was measured in different directions by a transient method, to determine the second-rank tensor of thermal transport properties as a function of temperature up to 800 °C. Thermal diffusivity of phonons is described as D=1/3 v l, where v is the phonon velocity and l the mean free …
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6 days ago · Alkali feldspars constitute a solid-solution between K-feldspar or orthoclase molecule (Or) and albite (Ab), which represents also the sodic end-member of the plagioclase series. Anorthite (Ca[Al 2 Si 2 O 8]; An) is present in small quantities in alkali feldspars, usually constituting less than 5% of the solid solution and predominantly found …
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Jul 26, 2022 · If the hardest mineral A scratches apatite (H=5), but orthoclase (H=6) scratches it, the hardness of specimen A is between 5 and 6. For students who want to memorize the Mohs Hardness Scale, a simple mnemonic will be The Geologist Can Find An Ordinary Quartz (that) Tourists Call Diamond. Each of the first or bolded letter represent …
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