Qhov sib txawv tseem ceeb ntawm gypsum thiab limestone yog cov calcium sulfate yog cov ntsiab lus tseem ceeb hauv gypsum whereas calcium carbonate yog cov ntsiab lus tseem ceeb ntawm limestone.
Limestone thiab gypsum yog cov zaub mov uas tsim los ntawm calcium ntsev; limestone muaj calcium carbonate thaum gypsum muaj CaSO4·2H2O. Txawm li cas los xij, lawv cov khoom thiab kev siv sib txawv ntawm ib leeg.
Gypsum yog dab tsi?
Gypsum yog hydrated calcium sulfate ntxhia nrog cov mis molecular CaSO 4·2H2O. Nws yog cov ntxhia sulfate tshaj plaws. Ntxiv mus, nws yog cov pob zeb tsim cov pob zeb uas tuaj yeem loj hlob mus txog qhov loj heev. Feem ntau, cov xim ntawm cov siv lead ua yog xim dawb lossis tsis muaj xim tab sis tuaj yeem muaj lwm cov xim xws li grey, liab lossis daj.
Daim duab 02: Gypsum Appearance
Tsis tas li, cov khoom siv lead ua tuaj yeem ua pob tshab lossis pob tshab. Gypsum yog siv lead ua mos uas peb tuaj yeem khawb tau yooj yim los ntawm tus ntiv tes. Tsis tas li ntawd, nws yog hloov tau thiab thermal conductivity tsawg. Gypsum muaj ntau nyob hauv Colorado thiab Mexico hauv Asmeskas. Gypsum feem ntau tsim los ntawm nag lossis daus ntawm dej hiav txwv. Nyob ntawd, thaum tsim, lwm hom pob zeb hauv av, dej lossis cov khoom tsis xav tau tuaj yeem ntxiab hauv cov siv lead ua, uas yog qhov ua rau muaj xim sib txawv. Peb siv cov khoom no feem ntau los ua plaster ntawm Paris, qee cov cement, chiv thiab ua pob zeb ornamental.
Limestone yog dab tsi?
Peb tuaj yeem pom cov pob zeb limestone feem ntau nyob rau hauv ib puag ncig marine, thiab peb tuaj yeem faib lawv li pob zeb sedimentary. Tsis tas li ntawd, cov khoom no feem ntau tsim nyob rau hauv ntiav, sov thiab txias dej. Tsis tas li ntawd, kev ua yeeb yam lom neeg ua lub luag haujlwm tseem ceeb hauv kev tsim cov khoom no.
Feem ntau, lawv tsim nyob rau hauv cov dej uas muaj cov pa roj carbon dioxide tsawg; Yog li ntawd, lub sedimentation yog heev yooj yim. Cov dej hauv hiav txwv tau txais cov calcium los ntawm av, thiab muaj ntau cov calcium carbonate uas muaj cov ntaub ntawv, xws li cov plhaub ntawm cov mollusks thiab lwm yam tsiaj hiav txwv, coral, cov pob txha pob txha ntawm cov tsiaj hiav txwv, thiab lwm yam. Thaum cov ntaub ntawv no sib sau ua cov calcite (lwm cov pov tseg. cov ntaub ntawv kuj zoo li koom ua ke rau hauv qhov no thaum accumulating), peb hu nws li limestone.
Daim duab 02: Limestone Appearance
Ntxiv mus, muaj lwm hom limestone; chemical sedimentary pob zeb. Lawv tsim los ntawm nag lossis daus ncaj qha ntawm calcium carbonate hauv dej hiav txwv. Txawm li cas los xij, cov pob zeb biological sedimentary muaj ntau dua li cov pob zeb chemical sedimentary. Hauv cov limestone ntshiab, muaj calcite nkaus xwb, tab sis feem ntau lawv tuaj yeem muaj impurities los ntawm kev sib xyaw lwm cov ntaub ntawv xws li xuab zeb. Yog li, limestone yog pob zeb sedimentary uas muaj ntau tshaj 50% ntawm calcium carbonate nyob rau hauv daim ntawv ntawm calcite.
Ntxiv mus, tsis yog hauv hiav txwv thiab hiav txwv, cov ntaub ntawv limestone hauv pas dej lossis lwm lub cev dej uas tsim nyog. Nyob rau hauv lub ntiaj teb no, peb tuaj yeem soj ntsuam cov limestone tsim nyob rau hauv Hiav Txwv Caribbean, Dej Hiav Txwv Khab, Persian Gulf, Gulf of Mexico, nyob ib ncig ntawm dej hiav txwv Pacific Islands, thiab lwm yam.
Nature and Uses
Qhov xwm ntawm limestone nyob ntawm seb nws tsim li cas. Lawv tuaj yeem tshwm sim hauv qhov ntau thiab tsawg, crystalline, granular, thiab lwm yam. Peb tuaj yeem muab faib ua ob peb pawg raws li lawv hom kev tsim, muaj pes tsawg leeg lossis cov tsos. Muaj ntau yam kev faib tawm thiab. Qee cov limestones feem ntau yog chalk, coquina, lithographic limestone, oolitic limestone, fossiliferous limestone, tufa, thiab lwm yam.
Ntxiv mus, muaj ntau yam kev siv limestone ib yam nkaus. Peb feem ntau siv lawv los ua cov khoom xyaw rau cov cement thiab iav tsim, yog li cov khoom siv tseem ceeb. Txij li limestone muaj ib qho xwm txheej; Nws yog siv los neutralize acidic dej lub cev.
Qhov txawv ntawm Gypsum thiab Limestone yog dab tsi?
Gypsum yog hydrated calcium sulfate ntxhia nrog cov qauv molecular CaSO 4·2H2O thiab limestone yog pob zeb sedimentary, tsim Feem ntau ntawm cov pob txha tawg ntawm cov kab mob marine xws li coral thiab mollusks. Yog li, qhov sib txawv tseem ceeb ntawm gypsum thiab limestone yog calcium sulfate yog lub ntsiab lus tseem ceeb hauv gypsum whereas calcium carbonate yog cov ntsiab lus tseem ceeb ntawm limestone.
Ntxiv mus, gypsum yog soluble ntau dua limestone. Raws li lwm qhov sib txawv tseem ceeb ntawm gypsum thiab limestone, limestone yog cov ntxhia acidic. Nws tuaj yeem hloov cov av pH vim yog pawg carbonate, tab sis gypsum yog cov ntxhia hauv nruab nrab; yog li ntawd, nws tsis tuaj yeem hloov av pH. Tsis tas li ntawd, gypsum tuaj yeem loj hlob mus rau hauv cov muaju loj dua limestone.
Cov duab hauv qab no qhia meej ntxiv txog qhov sib txawv ntawm gypsum thiab limestone.
Summary – Gypsum vs Limestone
Gypsum thiab limestone yog calcium ntsev. Qhov sib txawv tseem ceeb ntawm gypsum thiab limestone yog calcium sulfate yog lub ntsiab lus tseem ceeb hauv gypsum whereas calcium carbonate yog cov ntsiab lus tseem ceeb ntawm limestone.
