Cov ntaub ntawv pob zeb zeb siv nyob rau hauv kev kho kom zoo nkauj hauv tsev feem ntau aws hluav taws xob, uas tsuas yog hais txog peb hom scroative cov ntsiab lus: radium, thorium, thiab potassium. Pob zeb dag thiab plaub fab pob zeb tseem muaj hluav taws xob, tab sis feem ntau hluav taws xob yog tsawg heev thiab tsis ua rau muaj kev phom sij, nyob deb hauv qab ntawm tus qauv hauv tebchaws.
Pob zeb quartz yog lub hom pob zeb tshiab ntawm cov pob zeb artificialized los ntawm quartz muaju, cob, thiab lwm yam kab kawm. Pob zeb zoo quartz Pob zeb yog ua kom huv thiab huv cov ntaub ntawv tsim khoom, thiab cov khoom siv raw tsis muaj cov kev pheej hmoo ntawm cov kev pheej hmoo ntawm hluav taws xob voliat. Ntawm chav kawm, yog li ntawd -} hu ua tsis muaj hluav taws xob yog qhov nyuaj rau ua tiav nyob rau hauv ib txwm muaj mob thiab yuav tsum mus txog ncua sijhawm 273.15 degrees Celsius. Nyob rau hauv lub xeev no, quartz muaj tsis muaj thermal hluav taws xob, hluav taws xob hluav taws xob, lub teeb hluav taws xob, suab hluav taws xob, thiab ntawm chav kawm hluav taws xob.