Forsterite Mg2SiO4
Zụrụ nkume eke na ụlọ ahịa anyị
mineral forsterite
Ọ bụ akụkụ njedebe nke magnesium bara ụba nke usoro ngwọta siri ike olivine. Ọ bụ isomorphic na ọnụ fayalite nke nwere ígwè nwere kristal n'ụdị orthorhombic.
Anyị na-ekwenyekarị na forsterite na-ejikọta ya na nkume ndị na-egbuke egbuke na metamorphic. Anyị hụkwara ya na meteorites. N'afọ 2005, a hụkwara ya na uzuzu ọchị nke Stardust nyocha weghachiri. N'afọ 2011, a hụrụ ya dị ka obere kristal dị n'ígwé ojii nke uzuzu uzuzu n'akụkụ kpakpando na-apụta.
Enwere polymorphs abụọ nke nkume a. Wadsleyite, rhombic, dị ka ringwoodite, isometric. Ha abụọ sitere na meteorites.
Kristal dị ọcha bụ magnesium, yana oxygen na silicon. Usoro ọgwụ Mg2SiO4. Forsterite, fayalite Fe2SiO4 na tephroite Mn2SiO4 bụ ndị ikpeazụ so na usoro ngwọta olivine. Ihe ndị ọzọ dị ka Ni na Ca dochie Fe na Mg na olivine. Ma ọ bụ naanị na obere nha na ihe ndị sitere n'okike.
Ọkụ mineral ndị ọzọ dị ka monticellite CaMgSiO4. Ihe ịnweta pụrụ iche nke bara ụba na calcium nwere nhazi nke olivine. Ma enwere obere ngwọta siri ike n'etiti olivine na mineral ndị ọzọ. Anyị nwere ike ịhụ monticellite na kọntaktị na dolomites gbanwere.
Ihe mejupụtara Forsterite: Mg2SiO4
Ngwakọta kemịkalụ bụ tumadi anion SiO44- na cation Mg2+ n'ogo molar nke 1:2. Silicon bụ etiti etiti nke SiO44-anion. Otu njikọ covalent na-ejikọta atom oxygen ọ bụla na silicon. Atọm oxygen anọ na-akwụ ụgwọ na-adịghị mma.
N'ihi njikọ nke covalent na silicon. Ya mere, ikuku oxygen ga-adị n'ebe dị anya. Iji belata ike nke ịchụ nta n'etiti ha. Geometry kacha mma iji belata mkpofu bụ ọdịdị tetrahedral.
Ebu ụzọ kọwaa nke a na 1824 maka ikpe n'elu ugwu. Somma, Vesuvius, Italy. Aha ya sitere n'aka onye na-anakọta ihe okike na mineral Adolarius Jacob Forster.
A na-enyocha nkume ahụ ugbu a dị ka ihe nwere ike ime ihe na-emepụta ihe. N'ihi magburu onwe n'ibu Njirimara.
Gemological Njirimara
- Atiri: mesosilicates
- Ụdị: magnesium silicate (Mg2SiO4)
- Sistemụ kristal diamond
- Klas kristal: dipyramidal
- Agba: enweghị agba, akwụkwọ ndụ akwụkwọ ndụ, odo, odo-acha akwụkwọ ndụ, ọcha;
- Ọdịdị nke kristal: dipyramidal prisms, mgbe mgbe tabular, na-emekarị granular ma ọ bụ kọmpat, nnukwu.
- Mmekọrịta ugboro abụọ: {100}, {011} na {012}
- Akara olu: zuru oke maka {010} ezughị oke maka {100}
- Mgbaji: conchoidal
- Isi ike nke Mohs: 7
- Luster: vitreous
- Mpekere: ọcha
- Nghọta: nghọta na translucent
- Nnukwu ike ndọda: 3.21 - 3.33
- Njirimara anya: biaxial (+)
- Ntụgharị ntụgharị: nα = 1.636 - 1.730 nβ = 1.650 - 1.739 nγ = 1.669 - 1.772
- Mkpebi: δ = 0.033-0.042
- Akụkụ 2B: 82°
- Ebe mgbaze: 1890°C
forsterite pụtara na ọgwụ Njirimara, metaphysical uru
Nkebi na-esonụ bụ pseudo-sayensị sayensị ma dabere na nkwenkwe omenala.
kristal nwere ihe ọ pụtara na ọgwụgwọ nke ọnyá ndị gara aga. Ọ bụ nkume dị oké ọnụ ahịa nwere ike ịgwọ ọrịa siri ike. Nke a ga-eme ka ihe mgbu na-adịte aka n'oge gara aga kwụsị. Ọ na-enyekwa gị ike ile anya n'ọdịnihu.
FAQ
Kedu ihe bụ ngwa maka forsterite?
Dị ka nkume dị oké ọnụ ahịa maka ụlọ ọrụ mmepụta ihe dị ka ájá refractory na abrasives, magnesium ore na dị ka ịnweta ụdị. A na-akpọ kristal aha onye German okike Johann Forster. Ọ bụ otu n'ime mineral abụọ a na-akpọ olivine. Nke abụọ ịnweta bụ fayalite.
Kedu ihe dị iche na fayalite?
Fayalite bụ nkume nwere ígwè nwere usoro dị ọcha Fe2SiO4. Forsterite bụ ihe mejupụtara magnesium nwere usoro dị ọcha nke Mg2SiO4. Ma ọ bụghị ya, ha siri ike ịmata ọdịiche dị na ya, na ihe fọrọ nke nta ka ọ bụrụ ihe atụ nile nke mineral abụọ a nwere ma ígwè na magnesium.
Ebee ka a na-egwupụta egwu forsterite?
A na-ahụkarị nkume na dunites, gabbras, diabases, basalt na trachytes. Obere fayalite dị n'ọtụtụ nkume mgbawa ugwu ebe sodium na-adịkarị karịa potassium. A na-ahụkwa mineral ndị a na nkume limestones dolomitic, marble, na metamorphoses bara ụba nke ígwè.
Kedu ka esi gbakọọ ọdịnaya olivine na forsterite?
Atụmatụ ọdịnaya olivine-forsterite (Fo = 100 * Mg / (mkpokọta Mg + Fe), oke nke cations) na ọnụọgụ Ca cations (usoro ịnweta nke dabere na atọm oxygen anọ).
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