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Esquema molecular
Borax
Na2B4O5(OH)4·8H2O
Description
Borax is an evaporite mineral found in dry lake beds, composed of hydrated sodium borate.
Chemical composition
Chemical formula
Na2B4O5(OH)4·8H2O
Classification
boratos
Crystal system
monoclínico
Luster
vítreo a opalescente
Streak
blanca
Density
1.72 g/cm³
Temperatura de fusión
743 °C
Mohs Scale — 2.5/10
1
2
3
4
5
6
7
8
9
10
Referencia: Calcita
Color
#ffffff
#f0f8ff
incoloro a blanco
Usos
Uso cotidiano
Household cleaner, water softener, and bleaching agent.
Uso industrial
Flux in welding, ceramic glazes, and manufacture of borosilicate glass.
Similar minerals
Compare species
| Properties | Borax | Colemanite |
|---|---|---|
| Chemical formula | Na2B4O5(OH)4·8H2O | Ca2B6O11·5H2O |
| Classification | Borates | Borates |
| Crystal system | monoclínico | monoclínico |
| Hardness | 2.5 | 4.5 |
| Density | 1.72 g/cm³ | 2.42 g/cm³ |
| Luster | vítreo a opalescente | Vítreo a adamantino |
| Streak | blanca | Blanca |
| Cleavage | Unknown | Unknown |
| Transparency | Unknown | Unknown |
Similar minerals: Ulexita · Colemanita · Kernita
Derivatives and uses
Boric acid, elemental boron.
Geographic distribution
Extraction countries: Estados Unidos, Turquía, Argentina, Chile, China
Galería de la comunidad
Periodic table
Contains elements: Na · B · O · H
H
Hydrogen
#1 · Nonmetals
Atomic mass1.008 u
Density0.0899 g/cm³
Melting point-259.2 °C
Boiling point-252.9 °C
StateGas
Alkali metalsAlkaline earth metalsTransition metalsPost-transition metalsMetalloidsNonmetalsHalogensNoble gasesLanthanidesActinides
