Back
Esquema molecular
Arrastra para rotar · rueda o pinza para ampliar
Realgar
As4S4
Description
Realgar is an arsenic sulfide mineral with a vivid red color, photosensitive to light.
Chemical composition
Chemical formula
As4S4
Classification
Sulfides
Crystal system
monoclínico
Luster
Resinoso a graso
Streak
Naranja-rojizo
Density
3.56 g/cm³
Temperatura de fusión
320 °C
Mohs Scale — 2/10
1
2
3
4
5
6
7
8
9
10
Referencia: Yeso
Color
#FF4500
#FF8C00
Rojo anaranjado
Usos
Uso cotidiano
Historically used as a pigment in paints and cosmetics.
Uso industrial
Source of arsenic and reagent in fireworks.
Similar minerals
Compare species
| Properties | Realgar | Cinnabar | Orpiment | Cinnabar |
|---|---|---|---|---|
| Chemical formula | As4S4 | HgS | As2S3 | HgS |
| Classification | Sulfides | Sulfides | Sulfides | Sulfides |
| Crystal system | monoclínico | trigonal | monoclínico | trigonal |
| Hardness | 2 | 2.5 | 1.5 | 2.5 |
| Density | 3.56 g/cm³ | 8.1 g/cm³ | 3.49 g/cm³ | 8.1 g/cm³ |
| Luster | Resinoso a graso | adamantino a opaco | Resinoso a perlado | adamantino a submetálico |
| Streak | Naranja-rojizo | rojo escarlata | Amarillo pálido | rojo escarlata |
| Cleavage | Unknown | Unknown | Unknown | Unknown |
| Transparency | Unknown | Unknown | Unknown | Unknown |
Similar minerals: Oropimente · Cinabrio
Derivatives and uses
Arsenic oxides, arsenic acid.
Geographic distribution
Extraction countries: China, Estados Unidos, Rumanía, Italia
Periodic table
Contains elements: As · S
S
Sulfur
#16 · Nonmetals
Atomic mass32.06 u
Density2.07 g/cm³
Melting point115.2 °C
Boiling point444.6 °C
StateSolid
Alkali metalsAlkaline earth metalsTransition metalsPost-transition metalsMetalloidsNonmetalsHalogensNoble gasesLanthanidesActinides