Forsterite Mg2SiO4
Tusmo:
Ka iibso dhagaxyada dabiiciga ah dukaankayaga
macdanta forsterite
Waa qaybta dhamaadka magnesium-hodanka ah ee taxanaha xalka adag olivine. Waa isomorphic ilaa fayalite terminal bir qani ku ah oo lagu soo krayraysiiyay qaab orthorhombic ah.
Waxaan had iyo jeer aaminsannahay in forsterite ay la xiriirto dhagaxyada igneous iyo metamorphic. Waxaan sidoo kale ka helnay meteorites. Sannadkii 2005, waxa kale oo laga helay siigada majaajilada ah ee uu soo celiyay baadhitaanka Stardust. Sannadkii 2011, waxa loo arkay sida kiristaalo yaryar oo ku jira daruur gaas boodh leh oo ku wareegsan xiddig soo baxaya.
Waxaa jira laba polymorphs dhagaxan. Wadsleyite, rhombic, sida ringwoodite, isometric. Labaduba waxay inta badan ka yimaadaan saadaasha hawada.
crystal saafi ah waa magnesium, iyo sidoo kale oksijiin iyo silikon. Kiimikada Mg2SiO4. Forsterite, fayalite Fe2SiO4 iyo tephroite Mn2SiO4 waa xubnihii ugu dambeeyay ee taxanaha xalka olivine. Waxyaabaha kale sida Ni iyo Ca waxay beddelaan Fe iyo Mg ee olivines. Laakiin kaliya qaybo yar oo ka mid ah dhacdooyinka dabiiciga ah.
Macdano kale sida monticellite CaMgSiO4. Macdano aan caadi ahayn oo hodan ku ah calcium ayaa leh qaab-dhismeedka olivine. Laakiin waxaa jira qadar yar oo xal adag ah oo u dhexeeya olivine iyo macdanta kale. Waxaan ka heli karnaa monticellite xiriir la leh dolomites la beddelay.
Halabuurka Forsterite: Mg2SiO4
Halabuurka kiimikaad inta badan waa anion SiO44- iyo cation Mg2+ ee saamiga molar ee 1:2. Silikoon waa atamka dhexe ee SiO44- anion. Hal dammaanad oo isku xidhan ayaa atom kasta oo ogsijiin ah ku xidhaa silikoon. Afar atamka oksijiin ayaa qayb ahaan si xun loo dallacay.
Sababo la xiriira bond covalent leh silicon. Sidaa darteed, atamka ogsijiinta waa inay kala fogaadaan. Si loo yareeyo cududa iska celinaysa dhexdooda. Joomatari ugu fiican si loo yareeyo nacsigu waa qaabka tetrahedral.
Tan waxaa markii ugu horreysay lagu sharraxay 1824 kiis buur ku yaal. Somma, Vesuvius, Italy. Magaceedu wuxuu ka yimid dabiiciga Ingiriisi iyo ururiyaha macdanta Adolarius Jacob Forster.
Dhagaxa ayaa hadda la baarayaa in uu yahay maadada noole ee suurtogalka ah ee la geliyo. Sababo la xiriira sifooyinka farsamada ee aad u fiican.
Tilmaamaha Gemological
- Qaybta: mesosilicates
- Formula: magnesium silicate (Mg2SiO4)
- Nidaamka crystal dheeman
- fasalka Crystal: dipyramidal
- Midabka: midab la'aan, cagaar, jaalle, jaalle-cagaaran, caddaan;
- Qaabka crystals: prisms dipyramidal, inta badan tabular, badiyaa granular ama is haysta, weyn.
- Laba jeer iskaashi: {100}, {011} iyo {012}
- Qoorta: ku fiican {010} mid aan qummanayn {100}
- Jab: conchoidal
- Mohs adag: 7
- Luster: vitreous
- Xarig: cad
- Daah-furnaan: hufan oo hufan
- Culayska gaarka ah: 3.21 - 3.33
- Qalabka indhaha: biaxial (+)
- Tusmada dib-u-celinta: nα = 1.636 - 1.730 nβ = 1.650 - 1.739 nγ = 1.669 - 1.772
- Bireefringe: δ = 0.033-0.042
- Xagasha 2B: 82°
- Meesha dhalaalka: 1890°C
macnaha forsterite iyo guryaha dawooyinka, faa'iidooyinka metaphysical
Qaybta soo socota waa cilmi been abuur ah oo ku salaysan caqiidada dhaqameed.
Karistanku wuxuu leeyahay macno iyo sifooyin bogsiinaya boogaha hore. Waa dhagax dhagax leh oo leh tamar bogsiineed oo xooggan. Tani waxay soo afjari doontaa xanuunka ka dib markii hore. Waxa kale oo ay ku siinaysaa xoogga aad mustaqbalka ku eegto.
FAQ
Waa maxay codsiyada forsterite?
Sida dhagaxyada dhagaxa ah ee loogu isticmaalo warshadaha sida ciid ceeriyeyaasha iyo abrasives, magnesium ore iyo sida muunado macdanta ah. Crystal waxaa loogu magac daray dabiiciga Jarmalka Johann Forster. Waa mid ka mid ah laba macdan oo si fudud loogu tilmaamo olivine. Macdanta labaad waa fayalite.
Waa maxay farqiga u dhexeeya fayalite?
Fayalite waa dhagax bir qani ku ah oo leh qaacidada saafiga ah ee Fe2SiO4. Forsterite waa maaddo magnesium hodan ku ah oo leh qaacido saafi ah oo Mg2SiO4 ah. Haddii kale, way adag tahay in la kala saaro, oo ku dhawaad dhammaan shaybaarrada labadan macdan waxay ka kooban yihiin birta iyo magnesium labadaba.
Aaway forsterite miinada?
Dhagaxa waxaa caadi ahaan laga helaa dunites, gabbras, diabases, basalt iyo trachytes. Xaddi yar oo fayalite ah ayaa ku jira dhagaxyo foolkaanooyin badan oo soodhiyamku ka badan yahay potassium. Macdantan waxa kale oo laga helaa limestones dolomititic, marbles, iyo metamorphoses-ka qani ku ah birta.
Sida loo xisaabiyo waxyaabaha olivine ee forsterite?
Shirqoolkii olivine-forsterite content (Fo = 100 * Mg / (wadarta Mg + Fe), saamiga cations) oo ka soo horjeeda cadadka Ca cations (Qaabka macdanta oo ku salaysan afar atamka oxygen).
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