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Sanidine crystallizes in the monoclinic crystal system.Orthoclase is a monoclinic polymorph stable at lower temperatures.

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The translations of sanidine from English to other languages presented in this section have been obtained through automatic statistical translation; where the essential translation unit is the word «sanidine» in English.

The graph expresses the annual evolution of the frequency of use of the word «sanidine» during the past 500 years.

Significantly, 40Ar/39Ar step-heating analyses resolve distinct age gradients for both FCT and ACR sanidine.

Possible explanations for these gradients include combinations of recoil loss of 39Ar, instrumental bias, isotopic fractionation during step-heating, thermally induced argon loss and/or extraneous argon contamination.

Due to the long half life of 1.25 x 10Ar dating system (see photo at the top of this page) includes: (1) a Micromass 5400 high sensitivity-low background sector-type noble gas mass spectrometer, (2) a New Wave Research Dual Wave laser system comprising a CO continuous laser and an UV pulsed laser, and (3) a ultra-high vacuum metal purification line which includes Zr-Al SAES alloy getters and a cold trap.