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Esquema molecular
Arrastra para rotar · rueda o pinza para ampliar
Almandine
Fe3Al2(SiO4)3
Description
A mineral of the garnet group, it is the most common member of the pyralspite series.
Chemical composition
Chemical formula
Fe3Al2(SiO4)3
Classification
silicatos
Crystal system
cúbico
Luster
vítreo a subresinoso
Streak
blanca
Density
4.3 g/cm³
Temperatura de fusión
1315 °C
Mohs Scale — 7.5/10
1
2
3
4
5
6
7
8
9
10
Referencia: Topacio
Color
#8b0000
#a52a2a
#800000
rojo oscuro a marrón rojizo
Usos
Uso cotidiano
Jewelry and gemology.
Uso industrial
Industrial abrasive for sandblasting.
Similar minerals
Compare species
| Properties | Almandine | Spessartine | Andradite |
|---|---|---|---|
| Chemical formula | Fe3Al2(SiO4)3 | Mn3Al2(SiO4)3 | Ca3Fe2(SiO4)3 |
| Classification | Silicates | Silicates | Silicates |
| Crystal system | cúbico | cúbico | cúbico |
| Hardness | 7.5 | 7.5 | 7 |
| Density | 4.3 g/cm³ | 4.19 g/cm³ | 3.86 g/cm³ |
| Luster | vítreo a subresinoso | Vítreo | Vítreo a resinoso |
| Streak | blanca | Blanca | Blanca |
| Cleavage | Unknown | Unknown | Unknown |
| Transparency | Unknown | Unknown | Unknown |
Similar minerals: Piropo · Espesartina · Andradita
Derivatives and uses
Abrasive powders, cut gemstones.
Geographic distribution
Extraction countries: India, Estados Unidos, Brasil, Sri Lanka, Australia
Periodic table
Contains elements: Fe · Al · Si · O
O
Oxygen
#8 · Nonmetals
Atomic mass15.999 u
Density1.429 g/cm³
Melting point-218.8 °C
Boiling point-183 °C
StateGas
Alkali metalsAlkaline earth metalsTransition metalsPost-transition metalsMetalloidsNonmetalsHalogensNoble gasesLanthanidesActinides