Magnetic Properties,Characteristic Spectra and Colors of Turquoise

【摘要】 <正> The unique bright bluish-green color of turquoise as a high-grade jade has long receivedwide attention.The relationship between the color of turquoise and its composition and struc-ture is described in this paper on the basis of chemical data,EPR,magnetic susceptibility,ab-sorption and Mssbauer spectra.The results show that the basic color of turquoise（brightblue）is related to the existence of octahedrally on the amount of iron.EPR,magnetic susce-blue through green to earth-yellow is dependentcoordinated Cu²⁺ and the shade variation fromptibiIity,and crystal-field spectra of Cu²⁺ have been analyzed and compared with the theoreticalcalculations.A preliminary discussion is also made of the color change as a function of tempera-ture.更多还原

【Abstract】 The unique bright bluish-green color of turquoise as a high-grade jade has long received wide attention.The relationship between the color of turquoise and its composition and struc- ture is described in this paper on the basis of chemical data,EPR,magnetic susceptibility,ab- sorption and Mssbauer spectra.The results show that the basic color of turquoise（bright blue）is related to the existence of octahedrally on the amount of iron.EPR,magnetic susce- blue through green to earth-yellow is dependentcoordinated Cu²⁺ and the shade variation from ptibiIity,and crystal-field spectra of Cu²⁺ have been analyzed and compared with the theoretical calculations.A preliminary discussion is also made of the color change as a function of tempera- ture.更多还原