एक दुर्लभ नरम नारंगी खनिज जिसमें आर्सेनिक सल्फाइड होता है; आर्सेनिक का एक महत्वपूर्ण अयस्क

Noun:

रिअलगार,

realgar's Usage Examples:

Realgar >>

Realgar occurs native in orange prisms of specific gravity 3.5; it is prepared artificially by fusing together arsenic and sulphur, but the resulting products vary somewhat in composition; it is readily fusible and sublimes unchanged, and burns on heating in a current of oxygen, forming arsenic trioxide and sulphur dioxide.

There are three known compounds of arsenic and sulphur, namely, realgar As2S2, orpiment As2S3, and arsenic pentasulphide As2S5.

Arsenic is a constituent of the minerals arsenical iron, arsenical pyrites or mispickel, tin-white cobalt or smaltite, arsenical nickel, realgar, orpiment, pharmacolite and cobalt bloom, whilst it is also met with in small quantities in nearly all specimens of iron pyrites.

ORPIMENT (auripigmentum), arsenic trisulphide, As2S3, or yellow realgar, occurring in small quantities as a mineral crystallizing in the rhombic system and of a brilliant goldenyellow colour in Bohemia, Peru, 'c. For industrial purposes an artificial orpiment is manufactured by subliming one part of sulphur with two of arsenic trioxide.

Cinnabar, realgar, orpiment and coal form the rest of the mineral products of Kwei-chow.

Many substances were employed in ancient medicine: galena was the basis of a valuable Egyptian cosmetic and drug; the arsenic sulphides, realgar and orpiment, litharge, alum, saltpetre, iron rust were also used.

Arsenic, in its well-known and beautiful forms, orpiment and realgar, is found in New South Wales and Victoria.

realgar's Meaning':

a rare soft orange mineral consisting of arsenic sulphide; an important ore of arsenic

Synonyms:

mineral, atomic number 33, As, arsenic,

Antonyms:

organic,