The old term for the mineral is magnesia. Stones from the Magnesia region in ancient Anatolia contained both magnesium oxide and hydrated magnesium carbonate as well as iron oxides (such as magnetite). Thus these stones, called Stones from Magnesia in antiquity, with their unusual magnetic properties were the reason the terms magnet and magnetism were coined.
The crystal structure of periclase corresponds to that of halite and has been studied extensively due to its simplicity. As a consequence, the physical properties of periclase are well known, which makes the mineral a popular standard in experimental work. The mineral has been shown to remain stable at pressures up to at least 360 GPa.[7]
Mantle occurrenceedit
Ferropericlase(Mg,Fe)O makes up about 20% of the volume of the lower mantle of the Earth, which makes it the second most abundant mineral phase in that region after silicate perovskite(Mg,Fe)SiO3; it also is the major host for iron in the lower mantle.[8][9] At the bottom of the transition zone of the mantle, the reaction
γ–(Mg,Fe)2[SiO4] ↔ (Mg,Fe)[SiO3] + (Mg,Fe)O
transforms γ-olivine into a mixture of perovskite and ferropericlase and vice versa. In the literature, this mineral phase of the lower mantle is also often called magnesiowüstite.[6]
^ abAnthony, John W.; Bideaux, Richard A.; Bladh, Kenneth W.; Nichols, Monte C. (2005). "Periclase" (PDF). Handbook of Mineralogy. Mineral Data Publishing. Retrieved 14 March 2022.
^McWilliams, R. Stewart; Spaulding, Dylan K.; Eggert, Jon H.; Celliers, Peter M.; Hicks, Damien G.; Smith, Raymond F.; Collins, Gilbert W.; Jeanloz, Raymond (7 December 2012). "Phase Transformations and Metallization of Magnesium Oxide at High Pressure and Temperature". Science. 338 (6112): 1330–1333. Bibcode:2012Sci...338.1330M. doi:10.1126/science.1229450. PMID 23180773. S2CID 42129866.
^Lin, Jung-Fu; Vankó, György; Jacobsen, Steven D.; Iota, Valentin; Struzhkin, Viktor V.; Prakapenka, Vitali B.; Kuznetsov, Alexei; Yo, Choong-Shik (21 September 2007). "Spin transition zone in Earth's lower mantle". Science. 317 (5845): 1740–1743. Bibcode:2007Sci...317.1740L. doi:10.1126/science.1144997. PMID 17885134. S2CID 43215223.
^Researchers locate mantle’s spin transition zone, leading to clues about earth’s structure 2010-05-27 at the Wayback Machine
February 15, 2024
periclase, magnesium, mineral, that, occurs, naturally, contact, metamorphic, rocks, major, component, most, basic, refractory, bricks, cubic, form, magnesium, oxide, nature, usually, forms, solid, solution, with, wüstite, then, referred, ferropericlase, magne. Periclase is a magnesium mineral that occurs naturally in contact metamorphic rocks and is a major component of most basic refractory bricks It is a cubic form of magnesium oxide MgO In nature it usually forms a solid solution with wustite FeO and is then referred to as ferropericlase or magnesiowustite 6 PericlaseWhite to light greenish periclase with black srebrodolskite from Ronneburg Thuringia Germany Picture size 5 mm GeneralCategoryOxide mineralsFormula repeating unit MgOIMA symbolPer 1 Strunz classification4 AB 25Crystal systemIsometricCrystal classHexoctahedral m3 m H M symbol 4 m 3 2 m Space groupFm3 mUnit cell4 21 A Z 4IdentificationColorColorless grayish white yellow brownish yellow green blackCrystal habitGranular generally occurs as anhedral to subhedral octahedral crystals in matrixCleavage 001 perfect 111 imperfect may exhibit parting on 011 FractureConchoidalTenacityBrittleMohs scale hardness6LusterVitreousStreakWhiteDiaphaneityTransparent to translucentSpecific gravity3 56 3 68 meas 3 58 calc Optical propertiesIsotropicRefractive indexn 1 735 1 745Other characteristicsFluorescent long UV light yellow References 2 3 4 5 It was first described in 1840 and named from the Greek periklaw to break around in allusion to its cleavage The type locality is Monte Somma Somma Vesuvius Complex Naples Province Campania Italy 5 The old term for the mineral is magnesia Stones from the Magnesia region in ancient Anatolia contained both magnesium oxide and hydrated magnesium carbonate as well as iron oxides such as magnetite Thus these stones called Stones from Magnesia in antiquity with their unusual magnetic properties were the reason the terms magnet and magnetism were coined Periclase is usually found in marble produced by metamorphism of dolomitic limestones It readily alters to brucite under near surface conditions 5 In addition to its type locality it is reported from Predazzo Trentino Italy Carlingford County Louth Ireland Broadford Skye and the island of Muck Scotland Leon Spain the Bellerberg Volcano Eifel district Germany Nordmark and Langban Varmland Sweden and Kopeysk southern Ural Mountains Russia In the US it occurs at the Crestmore quarry Riverside County California Tombstone Arizona Gabbs district Nye County Nevada In Canada it occurs at Oka Quebec and in Australia west of Cowell Eyre Peninsula South Australia 3 The crystal structure of periclase corresponds to that of halite and has been studied extensively due to its simplicity As a consequence the physical properties of periclase are well known which makes the mineral a popular standard in experimental work The mineral has been shown to remain stable at pressures up to at least 360 GPa 7 Mantle occurrence editFerropericlase Mg Fe O makes up about 20 of the volume of the lower mantle of the Earth which makes it the second most abundant mineral phase in that region after silicate perovskite Mg Fe SiO3 it also is the major host for iron in the lower mantle 8 9 At the bottom of the transition zone of the mantle the reaction g Mg Fe 2 SiO4 Mg Fe SiO3 Mg Fe Otransforms g olivine into a mixture of perovskite and ferropericlase and vice versa In the literature this mineral phase of the lower mantle is also often called magnesiowustite 6 References edit Warr L N 2021 IMA CNMNC approved mineral symbols Mineralogical Magazine 85 3 291 320 Bibcode 2021MinM 85 291W doi 10 1180 mgm 2021 43 S2CID 235729616 Mineralienatlas a b Anthony John W Bideaux Richard A Bladh Kenneth W Nichols Monte C 2005 Periclase PDF Handbook of Mineralogy Mineral Data Publishing Retrieved 14 March 2022 Periclase data on Webmineral a b c Periclase Mindat org a b Ferropericlase Mindat org McWilliams R Stewart Spaulding Dylan K Eggert Jon H Celliers Peter M Hicks Damien G Smith Raymond F Collins Gilbert W Jeanloz Raymond 7 December 2012 Phase Transformations and Metallization of Magnesium Oxide at High Pressure and Temperature Science 338 6112 1330 1333 Bibcode 2012Sci 338 1330M doi 10 1126 science 1229450 PMID 23180773 S2CID 42129866 Lin Jung Fu Vanko Gyorgy Jacobsen Steven D Iota Valentin Struzhkin Viktor V Prakapenka Vitali B Kuznetsov Alexei Yo Choong Shik 21 September 2007 Spin transition zone in Earth s lower mantle Science 317 5845 1740 1743 Bibcode 2007Sci 317 1740L doi 10 1126 science 1144997 PMID 17885134 S2CID 43215223 Researchers locate mantle s spin transition zone leading to clues about earth s structure Archived 2010 05 27 at the Wayback Machine Retrieved from https en wikipedia org w index php title Periclase amp oldid 1187666358, wikipedia, wiki, book, books, library,
