trona
Sign in to saveTrona (trisodium hydrogendicarbonate dihydrate, also sodium sesquicarbonate dihydrate, Na2CO3·NaHCO3·2H2O) is a non-marine evaporite mineral. It is mined as the primary source of sodium carbonate in the United States, where it has replaced the Solvay process used in most of the rest of the world for sodium carbonate production. Turkey is also a major producer.
Key facts
- Mineral.name
- Trona
- Mineral.category
- Carbonate mineral
- Mineral.image
- Trona(small).jpg
- Mineral.imagesize
- 260px
- Mineral.formula
- Na2CO3·NaHCO3·2H2O
- Mineral.IMAsymbol
- Tn
- Mineral.strunz
- 5.CB.15
- Mineral.system
- Monoclinic
- Mineral.class
- Prismatic (2/m)(same H-M symbol)
- Mineral.symmetry
- C2/c (no. 15)
- Mineral.color
- Colorless (in transmitted light) or white, grey-white, also grey to yellowish grey, light yellow
- Mineral.habit
- Columnar, fibrous and massive.
- Mineral.cleavage
- [100] perfect, [111] and [001] indistinct
- Mineral.fracture
- Brittle – subconchoidal
- Mineral.mohs
- 2.5
- Mineral.luster
- Vitreous
- Mineral.refractive
- nα = 1.412 nβ = 1.492 nγ = 1.540
- Mineral.opticalprop
- Biaxial (−)
via Wikipedia infobox
~4 min read
Encyclopedic overview
7 sectionsContents
- Etymology
- Natural deposits
- Crystal structure
- Uses
- Mining operations
- See also
- References
Trona (trisodium hydrogendicarbonate dihydrate, also sodium sesquicarbonate dihydrate, Na2CO3·NaHCO3·2H2O) is a non-marine evaporite mineral. It is mined as the primary source of sodium carbonate in the United States, where it has replaced the Solvay process used in most of the rest of the world for sodium carbonate production. Turkey is also a major producer.
== Etymology == The word entered English by way of either Swedish () or Spanish (), with both possible sources having the same meaning as in English: the mineral natron from North Africa. Both the Spanish and Swedish terms derive from the Arabic trōn, which comes from ancient Greek (nitron), derived ultimately from Ancient Egyptian ntry (or nitry).
Excerpted from Wikipedia’s “trona” article, available under the CC BY-SA 4.0 licence.