Sep 17, 2024 · You have struck orthoclase! Orthoclase is a common chestnut-colored stone which conveniently happens to be magma-safe.Along with microcline, it is one of the most common types of stone most players will encounter.. In Real Life []. Orthoclase, a potassium-aluminum silicate, is an Alkali feldspar mineral that forms in relatively …
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Feb 15, 2022 · Orthoclase (KAlSi 3 O 8) is an aluminosilicate mineral [43].It belongs to monoclinic system and C2/m space group [44].The unit cell structure of orthoclase is formed by corner sharing AlO 4 and SiO 4 tetrahedral and K + ions filled in the cavities to compensate for the charge discrepancy caused by Al isomorphic substitution for Si …
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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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Jun 1, 2020 · Metallic Fe, orthoclase, albite, enstatite and spinel were used as standards for Fe, K, Na, Mg and Al, respectively. Andradite was used as a standard for Ca and Si. Atomic number effects ...
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Oct 23, 2021 · Activity–composition (a-x) relations for feldspars for petrological calculations in KAlSi 3 O 8 −NaAlSi 3 O 8 −CaAl 2 Si 2 O 8 are calibrated using literature data for (i) plagioclase cation exchange experiments at 600 and 700°C, (ii) experimental ternary feldspar pairs at 880 − 900°C, (iii) the alkali feldspar solvus, and (iv) the dry melting loop …
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Relief: Low negative Habit/Form: Common as anhedral and euhedral grains in igneous rocks. Crystals are commonly elongated parallel to c or a, and roughly tabular parallel to (010).Some orthoclase is perthitic, and much of it is cryptoperthitic. Color: Colorless, frequently cloudy due to incipient alteration (kaolinization) Pleochroism:–
Sep 30, 2022 · Orthoclase KAlSi3O8 °c 2001 Mineral Data Publishing, version 1.2 Crystal Data: Monoclinic. Point Group: 2=m: Crystals commonly short prismatic along [100] or [001], tabular on [010],to 20cm. Cleavable, granular, massive. Twinning: Common as simple, contact, or penetration twins according to the Carlsbad, Baveno, or Manebach laws.
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Jul 29, 2024 · Orthoclase (Formula KAlSi3O8), is an important tectosilicate mineral, which forms from or near igneous rock. It's known as Alkali Feldspar; is common in granite and some related rocks. Orthoclase is derived from the Greek phrase, "Straight Fracture". Orthoclase is also known as Moonstone. Orthoclase is the birthstone of June, along with …
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Orthoclase: R070001: K(AlSi 3 O 8) Michael Scott S102869: Lengenbach Quarry, Binnental, Valais, Switzerland: Orthoclase: R150014: K(AlSi 3 O 8) Jennifer Schmidt (LDP12-02) Locality: Cathedral Peak granite, near Toulumne meadows, Yosemite National Park, California, USA: Displaying: 1 - 10
Nov 1, 2000 · An in situ atomic force microscopy (AFM) image of a freshly cleaved orthoclase (001) surface is shown in Figure 4. This image shows that the predominant defect structure on the surface is in the form of individual steps with a measured height of 6.2 ± 0.4 Å and a typical separation of 0.5 μm.
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