todorokiten.

Brit.

/tɒdəˈrɒkʌɪt/,

/tɒˈdɒrəkʌɪt/, U.S.

/ˌtɑdəˈrɑˌkaɪt/,

/ˌtoʊdəˈroʊˌkaɪt/

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

Etymology: < the name of the Todoroki mine, Hokkaido, Japan, where the mineral was first identified + -ite suffix¹.Apparently coined in English by T. Yoshimura (compare quot. 1934), who also coined a Japanese equivalent todoroki-ishi, lit. ‘Todoroki stone’ in the same article.

Mineralogy.

A manganese-containing mineral which occurs typically as aggregates of black crystals and is a major constituent of underwater manganese nodules.Todorokite is a complex hydrated oxide of manganese with variable amounts of several other metals including calcium and magnesium, (Ca,K,Na,Mg,Ba,Mn)(Mn,Mg,Al)₆O₁₂·3H₂O. Crystal system: monoclinic.

ΘΚΠ

the world > the earth > minerals > types of mineral > oxides and hydroxides > [noun] > other oxides > oxides of two plus elements > hydrous or hydrated

julienite1928

todorokite1934

kobeite1950

wölsendorfite1957

1934 T. Yoshimura in Jrnl. Faculty Sci. Hokkaido Imperial Univ. 4th Ser. 2 296 The author now proposes the name ‘todorokite’..for such mineral species, with the new mineral from the Todoroki Mine as one of its representatives.

1981 Science 29 May 1024/1 Todorokites are calcium-bearing manganese oxides found in terrestrial manganese ore deposits, in weathering products of manganese-bearing rocks, and in some manganese nodules.

2004 G. C. Ferdock et al. in S. B. Castor & G. C. Ferdock Minerals of Nevada (Nevada Bureau Mines & Geol. Special Pub. 31) 438/1 Todorokite is derived by weathering or hydrothermal alteration of primary manganese minerals.

This entry has been updated (OED Third Edition, March 2016; most recently modified version published online March 2022).

单词	todorokite
释义	todorokiten. Brit. /tɒdəˈrɒkʌɪt/, /tɒˈdɒrəkʌɪt/, U.S. /ˌtɑdəˈrɑˌkaɪt/, /ˌtoʊdəˈroʊˌkaɪt/ Origin: From a proper name, combined with an English element. Etymons: proper name Todoroki , -ite suffix¹. Etymology: < the name of the Todoroki mine, Hokkaido, Japan, where the mineral was first identified + -ite suffix¹.Apparently coined in English by T. Yoshimura (compare quot. 1934), who also coined a Japanese equivalent todoroki-ishi, lit. ‘Todoroki stone’ in the same article. Mineralogy. A manganese-containing mineral which occurs typically as aggregates of black crystals and is a major constituent of underwater manganese nodules.Todorokite is a complex hydrated oxide of manganese with variable amounts of several other metals including calcium and magnesium, (Ca,K,Na,Mg,Ba,Mn)(Mn,Mg,Al)₆O₁₂·3H₂O. Crystal system: monoclinic. ΘΚΠ the world > the earth > minerals > types of mineral > oxides and hydroxides > [noun] > other oxides > oxides of two plus elements > hydrous or hydrated julienite1928 todorokite1934 kobeite1950 wölsendorfite1957 1934 T. Yoshimura in Jrnl. Faculty Sci. Hokkaido Imperial Univ. 4th Ser. 2 296 The author now proposes the name ‘todorokite’..for such mineral species, with the new mineral from the Todoroki Mine as one of its representatives. 1981 Science 29 May 1024/1 Todorokites are calcium-bearing manganese oxides found in terrestrial manganese ore deposits, in weathering products of manganese-bearing rocks, and in some manganese nodules. 2004 G. C. Ferdock et al. in S. B. Castor & G. C. Ferdock Minerals of Nevada (Nevada Bureau Mines & Geol. Special Pub. 31) 438/1 Todorokite is derived by weathering or hydrothermal alteration of primary manganese minerals. This entry has been updated (OED Third Edition, March 2016; most recently modified version published online March 2022). < n.1934
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