anorthoclasen.

/ænˈɔːθəkleɪz/

Etymology: < German Anorthoklas (coined in H. Rosenbusch Mikroskopische Physiographie der Mineralien u. Gesteine (1885) I. 550): see an- prefix², orthoclase n.

Min.

A triclinic sodium-rich alkali feldspar, (Na,K)AlSi₃O₈, similar to microcline, occurring in many slightly alkalic lavas.

ΘΚΠ

the world > the earth > minerals > types of mineral > silicates > tectosilicate > [noun] > feldspar > others

sunstone1652

huronite1836

taenite1841

hyalophane1855

belonite1868

microclase1885

anorthoclase1888

barbierite1910

1888 J. P. Iddings tr. Rosenbusch Microsc. Physiogr. Rock-Making Minerals 311 The series of triclinic potash-soda feldspars..is to be designated as the series of anorthoclases in distinction to the plagioclases which plainly cleave obliquely.

1903 A. Geikie Text-bk. Geol. (ed. 4) I. ii. 221 From a half to two-thirds of the rock consists of cryptoperthite (soda-orthoclase) and soda-microcline (anorthoclase of Rosenbusch).

1965 G. J. Williams Econ. Geol. N.Z. xi. 167/2 Among these rocks is a tinguaite consisting of a network of aegirine crystals with phenocrysts of anorthoclase.

1993 Jrnl. Geol. Soc. 150 892 The phonolites contain <5% of anorthoclase phenocrysts.

This entry has not yet been fully updated (first published 1997; most recently modified version published online November 2010).

单词	anorthoclase
释义	anorthoclasen. /ænˈɔːθəkleɪz/ Etymology: < German Anorthoklas (coined in H. Rosenbusch Mikroskopische Physiographie der Mineralien u. Gesteine (1885) I. 550): see an- prefix², orthoclase n. Min. A triclinic sodium-rich alkali feldspar, (Na,K)AlSi₃O₈, similar to microcline, occurring in many slightly alkalic lavas. ΘΚΠ the world > the earth > minerals > types of mineral > silicates > tectosilicate > [noun] > feldspar > others sunstone1652 huronite1836 taenite1841 hyalophane1855 belonite1868 microclase1885 anorthoclase1888 barbierite1910 1888 J. P. Iddings tr. Rosenbusch Microsc. Physiogr. Rock-Making Minerals 311 The series of triclinic potash-soda feldspars..is to be designated as the series of anorthoclases in distinction to the plagioclases which plainly cleave obliquely. 1903 A. Geikie Text-bk. Geol. (ed. 4) I. ii. 221 From a half to two-thirds of the rock consists of cryptoperthite (soda-orthoclase) and soda-microcline (anorthoclase of Rosenbusch). 1965 G. J. Williams Econ. Geol. N.Z. xi. 167/2 Among these rocks is a tinguaite consisting of a network of aegirine crystals with phenocrysts of anorthoclase. 1993 Jrnl. Geol. Soc. 150 892 The phonolites contain <5% of anorthoclase phenocrysts. This entry has not yet been fully updated (first published 1997; most recently modified version published online November 2010). < n.1888
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