pentahydrocalciten.

Brit.

/ˌpɛntəhʌɪdrə(ʊ)ˈkalsʌɪt/, U.S.

/ˈˌpɛn(t)əˌhaɪdroʊˈkælˌsaɪt/

Origin: Formed within English, by compounding; modelled on a Russian lexical item. Etymons: penta- comb. form, hydro- comb. form, calcite n.

Etymology: < penta- comb. form + hydro- comb. form + calcite n., after Russian pentagidrokal′cit (P. N. Čirvinskij 1906, in Ežegodnik po Geol. i Mineral. Rossii 8 241). Compare earlier hydrocalcite n. at hydro- comb. form 7.

Mineralogy.

A mineral supposedly consisting of a pentahydrated form of calcium carbonate, CaCO₃·5H₂O, the natural occurrence of which is uncertain.

ΘΚΠ

the world > the earth > minerals > types of mineral > carbonates > [noun] > hydrated calcium carbonate

pentahydrocalcite1910

trihydrocalcite1910

scawtite1929

1910 Mineral. Mag. 15 427 Pentahydrocalcite..Hydrated calcium carbonate, CaCO₃·5H₂O, occurring as a mould-like encrustation on chalk-marl near Nova-Alexandria, govt. Lublin, Russian Poland.

1928 Ann. Rep. Progr. Chem. 24 308 The minerals hydroconite, hydrocalcite (trihydrocalcite, pentahydrocalcite), and lublinite periodically come to be regarded as doubtful minerals, because when re-examined on museum material they are found to be merely calcite.

1957 G. E. Hutchinson Treat. Limnol. I. x. 660 The deposition of hydrates, supposedly CaCO₃·3H₂O, trihydrocalcite, and CaCO₃·5H₂O, pentahydrocalcite, in nature has been recorded.

1968 I. Kostov Mineral. 531 Trihydrocalcite..and pentahydrocalcite..are unstable and easily change into calcite.

This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022).

单词	pentahydrocalcite
释义	pentahydrocalciten. Brit. /ˌpɛntəhʌɪdrə(ʊ)ˈkalsʌɪt/, U.S. /ˈˌpɛn(t)əˌhaɪdroʊˈkælˌsaɪt/ Origin: Formed within English, by compounding; modelled on a Russian lexical item. Etymons: penta- comb. form, hydro- comb. form, calcite n. Etymology: < penta- comb. form + hydro- comb. form + calcite n., after Russian pentagidrokal′cit (P. N. Čirvinskij 1906, in Ežegodnik po Geol. i Mineral. Rossii 8 241). Compare earlier hydrocalcite n. at hydro- comb. form 7. Mineralogy. A mineral supposedly consisting of a pentahydrated form of calcium carbonate, CaCO₃·5H₂O, the natural occurrence of which is uncertain. ΘΚΠ the world > the earth > minerals > types of mineral > carbonates > [noun] > hydrated calcium carbonate pentahydrocalcite1910 trihydrocalcite1910 scawtite1929 1910 Mineral. Mag. 15 427 Pentahydrocalcite..Hydrated calcium carbonate, CaCO₃·5H₂O, occurring as a mould-like encrustation on chalk-marl near Nova-Alexandria, govt. Lublin, Russian Poland. 1928 Ann. Rep. Progr. Chem. 24 308 The minerals hydroconite, hydrocalcite (trihydrocalcite, pentahydrocalcite), and lublinite periodically come to be regarded as doubtful minerals, because when re-examined on museum material they are found to be merely calcite. 1957 G. E. Hutchinson Treat. Limnol. I. x. 660 The deposition of hydrates, supposedly CaCO₃·3H₂O, trihydrocalcite, and CaCO₃·5H₂O, pentahydrocalcite, in nature has been recorded. 1968 I. Kostov Mineral. 531 Trihydrocalcite..and pentahydrocalcite..are unstable and easily change into calcite. This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022). < n.1910
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