tincalconite
Sign in to saveTincalconite is a hydrous sodium borate mineral closely related to borax, and is a secondary mineral that forms as a dehydration product of borax. Its formula is Na2B4O7·5H2O or Na2[B4O5(OH)4]·3H2O.
Key facts
- Mineral.name
- Tincalconite
- Mineral.image
- TincalconiteUSGOV.jpg
- Mineral.imagesize
- 260px
- Mineral.category
- Nesoborates
- Mineral.formula
- Na2[B4O5(OH)4]·3H2O
- Mineral.IMAsymbol
- Tnc
- Mineral.strunz
- 6.DA.15
- Mineral.system
- Trigonal
- Mineral.class
- Trapezohedral (32) H-M symbol: (32)
- Mineral.symmetry
- R32
via Wikipedia infobox
Wikidata facts
- Named after
- powder
- Image
- TincalconiteUSGOV.jpg
Show 8 more facts
- Commons category
- Tincalconite
- Nickel-Strunz 9th edition (updated 2009)
- 6.DA.15
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 6.DA.15
- type locality (geology)
- Searles Lake
- crystal system
- trigonal crystal system
- IMA Mineral Symbol
- Tnc
- chemical formula
- Na₂B₄O₅(OH)₄·3H₂O
- Strunz 8th edition (series ID, updated)
- Vc/B.05
Sources (1)
via Wikidata · CC0
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Encyclopedic overview
2 sectionsContents
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Tincalconite is a hydrous sodium borate mineral closely related to borax, and is a secondary mineral that forms as a dehydration product of borax. Its formula is Na2B4O7·5H2O or Na2[B4O5(OH)4]·3H2O.
Tincalconite typically occurs as a fine grained white powder. It crystallizes in the hexagonal crystal system and has been found as primary euhedral di-rhombohedral, pseudo-octahedral crystals. It is also found pseudomorphically replacing borax crystals. It has a specific gravity of 1.88 and a Mohs hardness of 2. Refractive index values are nω=1.460 and nε=1.470.
Excerpted from Wikipedia’s “tincalconite” article, available under the CC BY-SA 4.0 licence.