I-Opal evela eMondulkiri, eCambodia - Isibuyekezo Esisha sango-2022 - Ividiyo
Okuqukethwe:
Thenga i-opal yemvelo esitolo sethu samatshe ayigugu
I-opal yaseCambodian
I-Opal iwuhlobo lwe-amorphous e-hydrated ye-silica (SiO2 nH2O); okuqukethwe kwayo kwamanzi kungahluka kusuka ku-3 kuya ku-21% ngesisindo, kodwa ngokuvamile ku-6 kuya ku-10%. Ngenxa yemvelo yayo ye-amorphous, ihlukaniswa njenge-mineraloid, ngokungafani nezinhlobo ze-crystalline ze-silica, ezihlukaniswa njengamaminerali.
Ifakwa ezingeni lokushisa eliphansi uma kuqhathaniswa futhi ingatholakala emifantwini cishe yanoma yiluphi uhlobo lwamadwala, evame ukwenzeka nge-limonite, sandstone, rhyolite, marl, ne-basalt. I-Opal iyigugu likazwelonke lase-Australia.
Isakhiwo sangaphakathi sombala odlalwayo we-opal senza ukukhanya kwe-refract. Kuye ngezimo okwenziwa kuzo, kungathatha imibala eminingi. Amatshe asukela kokucacile kuye kokumhlophe, okumpunga, okubomvu, okuwolintshi, okuphuzi, okuluhlaza okwesibhakabhaka, okunsomi, okubomvana, okupinki, okucwebile, omnqumo, okunsundu nokumnyama.
Kulawa ma-shades, amatshe amnyama yiwona angavamile, kanti amhlophe kanye nohlaza yiwona avame kakhulu. I-Opal iyahlukahluka ekumineni kokubona ukusuka kokukhanyayo kuye kokuguquguqukayo.
Umdlalo we-opal wombala ubonisa ukusebenzisana okuguquguqukayo kwemibala yangaphakathi futhi, nakuba i-mineraloid, inesakhiwo sangaphakathi. Ngesikali se-microscopic, i-opal edlala umbala yakhiwe ngama-silica sphere 150 kuya ku-300 nm ububanzi kugridi ecinene eyi-hexagonal noma i-cubic.
I-JW Sanders yabonisa maphakathi nawo-1960s ukuthi lawa ma-quartz sphere a-ode akhiqiza imibala yangaphakathi ngokubangela ukuphazamiseka nokuphazamiseka kokukhanya okudlula ku-opal microstructure.
Ubukhulu obufanele kanye nokupakishwa kwalobu buhlalu bunquma izinga letshe. Uma ibanga eliphakathi kwezindiza ezinqwabelene njalo zama-sphere licishe libe uhhafu wobude beza bengxenye yokukhanya ebonakalayo, ukukhanya kuleyo wavelength kungase kuhlakazwe ngegridi eyakhiwe izindiza ezistakiwe.
Imibala ebhekiwe inqunywa ibanga eliphakathi kwezindiza nokuma kwezindiza ngokuphathelene nokukhanya kwesigameko. Le nqubo ingachazwa ngumthetho we-Bragg diffraction.
U-Opal waseMondulkiri, eCambodia.
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