magnesite

/mag-nuh-sahyt/US // ˈmæg nəˌsaɪt //UK // (ˈmæɡnɪˌsaɪt) //

菱镁矿,菱锰矿,镁石,镁矿

Definitions

n.名词 noun

1
- : a mineral, magnesium carbonate, MgCO3, having a characteristic conchoidal fracture and usually occurring in white masses.

The magnesite readily gives up carbonic acid, which fills the tube and sweeps the mercury vapour before it.
As carbonate it occurs in large quantity as magnesite (MgCO3), which is the chief source of magnesia.
All carbonates are soluble with effervescence in dilute acids; some, such as chalybite and magnesite, require the aid of heat.
The salt may be obtained from Kieserite: formerly it was prepared by treating magnesite or dolomite with sulphuric acid.
Other votive inscriptions are found on rings and on knobs of ivory or magnesite.