Farashin Mg2SiO4
Sayi duwatsu na halitta a cikin kantinmu
ma'adinai forsterite
Yana da ma'auni na ƙarshe na magnesium-arziƙi na olivine solid bayani jerin. Yana da isomorphic zuwa fayalite mai arziƙin ƙarfe wanda aka yi masa crystallized a sigar orthorhombic.
Koyaushe mun yi imani cewa forsterite yana da alaƙa da igneous da metamorphic duwatsu. Mun same shi a cikin meteorites kuma. A cikin 2005, an kuma same shi a cikin ƙurar barkwanci ta Stardust bincike. A cikin 2011, an lura da shi azaman ƙananan lu'ulu'u a cikin gajimare mai ƙura a kusa da tauraro mai tasowa.
Akwai polymorphs guda biyu na wannan dutse. Wadsleyite, rhombic, kamar ringwoodite, isometric. Dukansu sun fito ne daga meteorites.
Kyakkyawan crystal shine magnesium, da oxygen da silicon. Tsarin sinadaran Mg2SiO4. Forsterite, fayalite Fe2SiO4 da tephroite Mn2SiO4 sune mambobi na ƙarshe na jerin mafita na olivine. Sauran abubuwa kamar Ni da Ca maye gurbin Fe da Mg a cikin zaitun. Amma kawai a cikin ƙananan rabbai a cikin al'amuran halitta.
Sauran ma'adanai irin su monticellite CaMgSiO4. Wani sabon abu mai ma'adinai mai arziki a cikin calcium yana da tsarin olivine. Amma akwai ɗan ƙaramin bayani mai ƙarfi tsakanin olivine da waɗannan ma'adanai. Za mu iya samun monticellite cikin hulɗa tare da dolomites da aka canza.
Haɗin Forsterite: Mg2SiO4
Abubuwan sinadaran sun fi anion SiO44- da cation Mg2+ a cikin rabon molar na 1:2. Silicon shine tsakiyar zarra na SiO44-anion. Covalent bond guda ɗaya yana haɗa kowane atom na oxygen zuwa silicon. Ana cajin zarra guda huɗu mara kyau.
Sakamakon covalent bond tare da silicon. Don haka, dole ne atom ɗin oxygen su kasance da nisa. Domin rage karfin tunkuda a tsakaninsu. Mafi kyawun juzu'i don rage ƙima shine siffar tetrahedral.
An fara bayyana wannan a cikin 1824 don shari'ar kan dutse. Somma, Vesuvius, Italy. Sunanta ya fito ne daga masanin halitta da mai tara ma'adinai na Ingilishi Adolarius Jacob Forster.
A halin yanzu ana binciken dutsen a matsayin yuwuwar biomaterial don sakawa. Saboda kyawawan kaddarorin inji.
Gemological Properties
- Category: mesosilicates
- Formula: magnesium silicate (Mg2SiO4)
- Tsarin lu'ulu'u na lu'u-lu'u
- Crystal class: dipyramidal
- Launi: mara launi, kore, rawaya, rawaya-kore, fari;
- Siffar lu'ulu'u: dipyramidal prisms, sau da yawa tabular, yawanci granular ko m, m.
- Haɗin kai sau biyu: {100}, {011} da {012}
- Layin wuya: cikakke don {010} ajizai don {100}
- Karya: conchoidal
- Taurin Mohs: 7
- Luster: vitreous
- Tafi: fari
- Bayyanawa: m zuwa translucent
- Musamman nauyi: 3.21 - 3.33
- Abubuwan gani: biaxial (+)
- Fihirisar magana: nα = 1.636 - 1.730 nβ = 1.650 - 1.739 nγ = 1.669 - 1.772
- Ƙaddamarwa: δ = 0.033-0.042
- kusurwa 2B: 82°
- Matsayin narkewa: 1890 ° C
forsterite ma'anar da magani Properties, metaphysical amfanin
Sashe mai zuwa na jabu ne-kimiyya kuma ya dogara da imanin al'adu.
crystal yana da ma'ana da kayan warkarwa na raunukan da suka gabata. Dutsen dutse ne mai ƙarfi da ƙarfin warkarwa. Wannan zai kawo ƙarshen radadin da ke faruwa a baya. Hakanan yana ba ku ƙarfi don duba gaba.
FAQ
Menene aikace-aikacen forsterite?
A matsayin duwatsu masu daraja don amfani da masana'antu a matsayin yashi mai raɗaɗi da abrasives, magnesium tama da samfuran ma'adinai. An sanya wa lu'ulu'u suna bayan ɗan asalin Jamus Johann Forster. Yana daya daga cikin ma'adanai guda biyu da ake kira olivine kawai. Ma'adinai na biyu shine fayalite.
Menene bambanci da fayalite?
Fayalite dutse ne mai arzikin ƙarfe tare da tsantsar dabara Fe2SiO4. Forsterite wani sinadari ne mai arzikin magnesium tare da tsantsar tsari na Mg2SiO4. In ba haka ba, suna da wahalar bambancewa, kuma kusan dukkanin samfuran waɗannan ma'adanai biyu sun ƙunshi ƙarfe da magnesium.
Ina ake hako ma'adinan forsterite?
Ana samun dutsen a dunites, gabbras, diabases, basalt da trachytes. Ƙananan fayalite suna samuwa a yawancin duwatsu masu aman wuta inda sodium ya fi yawa fiye da potassium. Hakanan ana samun waɗannan ma'adanai a cikin duwatsun dolomitic, marmara, da metamorphoses masu arzikin ƙarfe.
Yadda za a lissafta abun ciki na olivine a cikin forsterite?
Makircin abun ciki na olivine-forsterite (Fo = 100 * Mg / (jimlar Mg + Fe), adadin cations) tare da adadin Ca cations (ma'anar ma'adinai dangane da kwayoyin oxygen guda hudu).
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