ramsdelliten.

Brit.

/ˈramzdəlʌɪt/, U.S.

/ˈræmzdəˌlaɪt/

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

Etymology: < the name of Lewis S. Ramsdell (1895–1975), U.S. mineralogist, who described the mineral in 1932 ( Amer. Mineral. 17 143–9) + -ite suffix¹.

Mineralogy.

A manganese-containing mineral that occurs as grey to black, platy, or finely crystalline masses, and is dimorphous with pyrolusite.Ramsdellite is an oxide of manganese, MnO₂. Crystal system: orthorhombic.

ΘΚΠ

the world > the earth > minerals > types of mineral > oxides and hydroxides > [noun] > rutile and uranite groups A02 > others

plattnerite1849

ramsdellite1943

1943 M. Fleischer & W. E. Richmond in Econ. Geol. 38 278 Ramsdellite. [Note] This is the first use of this name in print. The mineral was described in 1932 by Ramsdell..as a possible dimorph of pyrolusite.

1972 Mineral. Rec. 3 210 Ramsdellite, a relatively common mineral in the Chihuahua geodes, is found as fibrous dendritic masses on quartz.

1999 Proc. National Acad. Sci. U.S.A. 96 3449/2 Ramsdellite is a relatively rare mineral, usually occurring in low-temperature hydrothermal deposits and commonly associated with, and probably altering to, pyrolusite.

This entry has been updated (OED Third Edition, June 2008; most recently modified version published online March 2022).

单词	ramsdellite
释义	ramsdelliten. Brit. /ˈramzdəlʌɪt/, U.S. /ˈræmzdəˌlaɪt/ Origin: From a proper name, combined with an English element. Etymons: proper name Ramsdell , -ite suffix¹. Etymology: < the name of Lewis S. Ramsdell (1895–1975), U.S. mineralogist, who described the mineral in 1932 ( Amer. Mineral. 17 143–9) + -ite suffix¹. Mineralogy. A manganese-containing mineral that occurs as grey to black, platy, or finely crystalline masses, and is dimorphous with pyrolusite.Ramsdellite is an oxide of manganese, MnO₂. Crystal system: orthorhombic. ΘΚΠ the world > the earth > minerals > types of mineral > oxides and hydroxides > [noun] > rutile and uranite groups A02 > others plattnerite1849 ramsdellite1943 1943 M. Fleischer & W. E. Richmond in Econ. Geol. 38 278 Ramsdellite. [Note] This is the first use of this name in print. The mineral was described in 1932 by Ramsdell..as a possible dimorph of pyrolusite. 1972 Mineral. Rec. 3 210 Ramsdellite, a relatively common mineral in the Chihuahua geodes, is found as fibrous dendritic masses on quartz. 1999 Proc. National Acad. Sci. U.S.A. 96 3449/2 Ramsdellite is a relatively rare mineral, usually occurring in low-temperature hydrothermal deposits and commonly associated with, and probably altering to, pyrolusite. This entry has been updated (OED Third Edition, June 2008; most recently modified version published online March 2022). < n.1943
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