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The effect of quartz on the magnetic anisotropy of quartzite

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Монокрuсmaллы квaрцa являюmся ¶rt;uaмaгнumнымu (восnрuuмчuвосmь−14 × 10−6 в сuсmеме СИ) u оченъ мaло aнuзоmроnuынмu (не более1%). Эmо знaчum, чmо восnрuuмчuвосmь основноŭ квaрцевоŭ мaссы в квaрцumaх можеm быmь nрuняma nрaкmuческu uсоmроnноŭ. Из мamемamuческого мо¶rt;елuровaнuя сле¶rt;уеm, чmо nо nрuчuне влuянuя оmрuцamельноŭ u uзоmроnноŭ восnрuuмчuвосmu основноŭ квaрцевоŭ мaссы сmеnень aнuзоmроnносmu квaрцuma выше, чем сmеnень aнuзоmроnносmu феромaгнumноŭ фрaкцuu. Эmо влuянuе нauбольее mог¶rt;a, ког¶rt;a сре¶rt;нaя восnрuuмчuвосmь блuзкa нулю.

Summary

The magnetic susceptibility of quartz single crystals is diamagnetic (−14×10−6 in SI units) and exhibits only very small anisotropy (mostly less than 1%); thus the susceptibility of the quartz matrix in quartzite can be regarded as virtually isotropic. Owing to the influence of the negative and isotropic susceptibility of the quartz matrix, the degree of anisotropy of quartzite, as inferred from model calculations, is higher than that of the ferrimagnetic fraction. This influence is very strong if the mean susceptibility of quartzite is in the vicinity of zero.

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Hrouda, F. The effect of quartz on the magnetic anisotropy of quartzite. Stud Geophys Geod 30, 39–45 (1986). https://doi.org/10.1007/BF01630853

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