howlite
Sign in to saveHowlite, a calcium borosilicate hydroxide (Ca2B5SiO9(OH)5), is a borate mineral found in evaporite deposits.
Key facts
- Mineral.name
- Howlite
- Mineral.category
- Inoborates
- Mineral.image
- Howlite.jpg
- Mineral.imagesize
- 260px
- Mineral.formula
- Ca2B5SiO9(OH)5
- Mineral.IMAsymbol
- How
- Mineral.strunz
- 6.CB.20
- Mineral.dana
- 25.3.5.1
- Mineral.system
- Monoclinic
- Mineral.class
- Prismatic (2/m) (same H-M symbol)
- Mineral.symmetry
- P21/c
- Mineral.unit cell
- a = 12.82 Å, b = 9.351(1) Å c = 8.608(2) Å; β = 104.84(2)°; Z = 4
- Mineral.color
- White, colorless
- Mineral.habit
- Massive to nodular, occurs as tabular prisms flattened parallel to [100]
- Mineral.cleavage
- None
- Mineral.fracture
- Conchoidal, uneven
- Mineral.mohs
- 3.5
- Mineral.luster
- Subvitreous, glimmering
via Wikipedia infobox
Wikidata facts
- Image
- Howlite - tumble polished stone.jpg
Show 6 more facts
- Strunz 8th edition (series ID, updated)
- VIII/A’.13
- Commons category
- Howlite
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 6.CB.20
- Nickel-Strunz 9th edition (updated 2009)
- 6.CB.20
- IMA Mineral Symbol
- How
- chemical formula
- Ca₂B₅SiO₉(OH)₅
Sources (1)
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Article
7 sectionsContents
- History
- Geology
- Jewelry
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- See also
- References
- Bibliography
Howlite, a calcium borosilicate hydroxide (Ca2B5SiO9(OH)5), is a borate mineral found in evaporite deposits.
== History == Howlite was discovered near Windsor, Nova Scotia, in 1868 by Henry How (1828–1879), a Canadian chemist, geologist, and mineralogist. How was alerted to the unknown mineral by miners in a gypsum quarry, who found it to be a nuisance. He called the new mineral silico-boro-calcite; it was given the name howlite by the American geologist James Dwight Dana shortly thereafter.