redonditen.

Brit.

/rəˈdɒndʌɪt/, U.S.

/rəˈdənˌdaɪt/

Origin: From a proper name, combined with an English element. Etymons: proper name Redonda , -ite suffix¹.

Etymology: < Redonda, the name of an island in the West Indies (now part of the territory of Antigua and Barbuda), where the mineral was discovered + -ite suffix¹ (see quot. 1870).

Mineralogy.

A rare phosphate mineral of the variscite group which occurs as whitish amorphous masses.Redondite is a hydrated phosphate of aluminium and iron; (Al,Fe)PO₄·2H₂O. Crystal system: orthorhombic.

ΘΚΠ

the world > the earth > minerals > types of mineral > phosphates > [noun] > aluminium or iron phosphates

redondite1870

paravauxite1922

vauxite1922

1870 C. U. Shepard in Amer. Jrnl. Sci. 50 96 Redondite. I have examined still farther the hydrous phosphate of alumina and iron described by me in a previous number of this journal..as occurring so abundantly in the island of Redonda, W. I., and am now of the opinion that it constitutes a species distinct from barrandite... Barrandite has gr. = 2·576. Redondite gives gr. = 2·019.

1907 Science 15 Mar. 409/2 The most remarkable feature was the wonderful effect of liming in increasing the efficiency of the roasted Redondite (iron and aluminum phosphate).

1964 Amer. Mineralogist 49 445 X-ray powder data are given on redondite from Ponikla and Listenec, Czechoslovakia, from Redonda Island, and for tangaite from Tanganyika... Redondite (and tangaite) give patterns that are identical and distinct from those of variscite and clinovariscite... The authors feel that the name redondite should be used for all material of this type with Al > Fe and the name tangaite is superfluous.

1975 Mineral Abstr. 26 225/2 Variscite, crandallite, and redondite, relatively rare phosphate minerals, are found in phosphatic rocks associated with carbonatites and syenites in the Grande islet (Brava island) Cape Verde.

This entry has been updated (OED Third Edition, September 2009; most recently modified version published online March 2022).

单词	redondite
释义	redonditen. Brit. /rəˈdɒndʌɪt/, U.S. /rəˈdənˌdaɪt/ Origin: From a proper name, combined with an English element. Etymons: proper name Redonda , -ite suffix¹. Etymology: < Redonda, the name of an island in the West Indies (now part of the territory of Antigua and Barbuda), where the mineral was discovered + -ite suffix¹ (see quot. 1870). Mineralogy. A rare phosphate mineral of the variscite group which occurs as whitish amorphous masses.Redondite is a hydrated phosphate of aluminium and iron; (Al,Fe)PO₄·2H₂O. Crystal system: orthorhombic. ΘΚΠ the world > the earth > minerals > types of mineral > phosphates > [noun] > aluminium or iron phosphates redondite1870 paravauxite1922 vauxite1922 1870 C. U. Shepard in Amer. Jrnl. Sci. 50 96 Redondite. I have examined still farther the hydrous phosphate of alumina and iron described by me in a previous number of this journal..as occurring so abundantly in the island of Redonda, W. I., and am now of the opinion that it constitutes a species distinct from barrandite... Barrandite has gr. = 2·576. Redondite gives gr. = 2·019. 1907 Science 15 Mar. 409/2 The most remarkable feature was the wonderful effect of liming in increasing the efficiency of the roasted Redondite (iron and aluminum phosphate). 1964 Amer. Mineralogist 49 445 X-ray powder data are given on redondite from Ponikla and Listenec, Czechoslovakia, from Redonda Island, and for tangaite from Tanganyika... Redondite (and tangaite) give patterns that are identical and distinct from those of variscite and clinovariscite... The authors feel that the name redondite should be used for all material of this type with Al > Fe and the name tangaite is superfluous. 1975 Mineral Abstr. 26 225/2 Variscite, crandallite, and redondite, relatively rare phosphate minerals, are found in phosphatic rocks associated with carbonatites and syenites in the Grande islet (Brava island) Cape Verde. This entry has been updated (OED Third Edition, September 2009; most recently modified version published online March 2022). < n.1870
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