Sejo se seholo sa corundum?

Karolo e ka sehloohong ea corundum ke aluminium oxide.

corundum, lebitso le tsoang India, ke lebitso la mineralogical. Ho na le mefuta e meraro e ka sehloohong ea homogeneity ea corundum Al2O3, e leng α-Al2O3, β-Al2O3, le γ-Al2O3. Ho thatafala ha corundum ke ea bobeli feela ho daemane.

Corundum ke lejoe la majoe le entsoeng ka likristale tsa alumina (Al2O3). Corundum e tsoakiloeng le metallic chromium e bofubelu bo khanyang ‘me ka kakaretso e bitsoa ruby; athe corundum e putsoa kapa e se nang ‘mala hangata e hlalosoa e le safire.

Corundum e boemong ba bo-9 tafoleng ea boima ba Mohs. Matla a khoheli a itseng ke 4.00, ‘me e na le sebopeho sa letiti sa kholumo ea hexagonal. Ka lebaka la boima ba eona le theko e batlang e le tlase ho feta litaemane, corundum e fetohile thepa e ntle bakeng sa sandpaper le lisebelisoa tsa ho sila.

Corundum e na le khanya ea khalase, boima ba 9. Karolo ke 3.95-4.10. E thehiloe tlas’a maemo a mocheso o phahameng, aluminium e ruileng le silicon e futsanehileng ea C, ‘me e amana haholo le magmatism, metamorphism ea ho kopana le metamorphism ea libaka.

Corundum ke thepa e entsoeng ke motho e entsoeng ka bauxite e le thepa e ka sehloohong e tala ka sebōping sa merafo. E ka sebelisoa e le thepa ea abrasive le refractory. Corundum e tšoeu e nang le bohloeki bo phahameng e bitsoa white corundum, ‘me corundum e sootho e nang le litšila tse nyenyane e bitsoa brown corundum.

Haholo-holo ho na le mefuta e meraro ea homogeneity ea corundum Al2O3, e leng α-Al2O3, β-Al2O3, γ-Al2O3, le η-Al2O3 (equaxial crystal system) le ρ-Al2O3 (crystal system) ho latela tlhahlobo ea X-ray diffraction. Tsamaiso e sa tsitsang), χ-Al2O3 (tsamaiso ea hexagonal), κ-Al2O3 (hexagonal system), δ-Al2O3 (tetragonal system), θ-Al2O3 (monoclinic system). Corundum e na le mebala e mengata, ho kenyelletsa le e se nang mebala, e tšoeu, ea khauta (pigment ion Ni, Cr), e mosehla (pigment ion Ni), e khubelu (pigment ion Cr), e putsoa (pigment ion Ti, Fe), e tala (pigment ion Co, Ni) , V), pherese (Ti, Fe, Cr), e sootho, e ntšo (pigment ion Fe, Fe), blue-violet tlas’a lebone la incandescent, phello e khubelu-pherese tlas’a lebone la fluorescent (pigment ion V).