kernite
Sign in to saveKernite, also known as rasorite, is a hydrated sodium borate hydroxide mineral with formula . It is a colorless to white mineral crystallizing in the monoclinic crystal system typically occurring as prismatic to acicular crystals or granular masses. It is relatively soft with Mohs hardness of 2.5 to 3 and light with a specific gravity of 1.91. It exhibits perfect cleavage and a brittle fracture.
Key facts
- Mineral.name
- Kernite
- Mineral.category
- Inoborates
- Mineral.image
- Kernite - USGS Mineral Specimens 692.jpg
- Mineral.IMAsymbol
- Ker
- Mineral.molweight
- 273.22 g/mol
- Mineral.strunz
- 6.DB.05
- Mineral.system
- Monoclinic
- Mineral.class
- Prismatic (2/m) (same H-M symbol)
- Mineral.symmetry
- P21/c
- Mineral.unit cell
- a = 7.0172(2) b = 9.1582(2) c = 15.6774(5) [Å] β = 108.861(2)°; Z = 4
- Mineral.color
- Colorless, white
- Mineral.habit
- Crystalline - occurs as well-formed coarse sized crystals
- Mineral.cleavage
- Perfect on [100] and [001], good on [201]
- Mineral.fracture
- Splintery
- Mineral.tenacity
- Brittle
- Mineral.mohs
- 2.5-3
- Mineral.luster
- Vitreous - pearly
- Mineral.refractive
- nα=1.454, nβ=1.472, nγ=1.488
via Wikipedia infobox
Wikidata facts
- Image
- Kernite - USGS Mineral Specimens 692.jpg
Show 6 more facts
- Commons category
- Kernite
- Nickel-Strunz 9th edition (updated 2009)
- 6.DB.05
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 6.DB.05
- IMA Mineral Symbol
- Ker
- chemical formula
- Na₂B₄O₆(OH)₂·3H₂O
- Strunz 8th edition (series ID, updated)
- Vc/C.04
Sources (1)
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Article
3 sectionsContents
- Occurrence and history
- Uses
- References
Kernite, also known as rasorite, is a hydrated sodium borate hydroxide mineral with formula . It is a colorless to white mineral crystallizing in the monoclinic crystal system typically occurring as prismatic to acicular crystals or granular masses. It is relatively soft with Mohs hardness of 2.5 to 3 and light with a specific gravity of 1.91. It exhibits perfect cleavage and a brittle fracture.
Kernite is soluble in cold water and alters to tincalconite when it dehydrates. It undergoes a non-reversible alteration to metakernite () when heated to above 100 °C.