laumontite
Sign in to saveAlso known as lomonite, laumonite
right|thumb|250px|Laumontite crystals Laumontite is a mineral, one of the zeolite group. Its molecular formula is , a hydrated calcium-aluminium silicate. Potassium or sodium may substitute for the calcium but only in very small amounts.
In the Vinony graph
Within Vinony's link graph, laumontite is referenced by 27 other articles, and connects out to Mohs scale of mineral hardness, India and Iceland.
It is catalogued under topics including Aluminium minerals, Calcium minerals and Luminescent minerals.
Its subject is documented across 20 Wikipedia language editions.
Key facts
- Mineral.fracture
- Uneven
- Mineral.mohs
- 4
- Mineral.name
- Laumontite
- Mineral.category
- Tectosilicate minerals
- Mineral.group
- Zeolite group
- Mineral.image
- Laumontita.jpg
- Mineral.imagesize
- 260px
- Mineral.IMAsymbol
- Lmt
- Mineral.strunz
- 9.GB.10
- Mineral.system
- Monoclinic
- Mineral.class
- Prismatic (2/m) (same H-M symbol)
- Mineral.symmetry
- C2/m
- Mineral.color
- White, colorless, yellowish, brownish
- Mineral.cleavage
- Perfect, two directions
via Wikipedia infobox
Wikidata facts
- Image
- Prehnite-Laumontite-132299.jpg
Show 8 more facts
- Nickel-Strunz 9th edition (updated 2009)
- 9.GB.10
- Commons category
- Laumontite
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 9.GB.10
- crystal system
- monoclinic crystal system
- type locality (geology)
- Huelgoat
- IMA Mineral Symbol
- Lmt
- chemical formula
- CaAl₂Si₄O₁₂·4H₂O
- Strunz 8th edition (series ID, updated)
- VIII/F.11 – Anhang
Sources (1)
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Encyclopedic overview
2 sectionsContents
- References
- External links
right|thumb|250px|Laumontite crystals Laumontite is a mineral, one of the zeolite group. Its molecular formula is , a hydrated calcium-aluminium silicate. Potassium or sodium may substitute for the calcium but only in very small amounts.
It is monoclinic, space group C2/m. It forms prismatic crystals with a diamond-shaped cross-section and an angled termination. When pure, the color is colorless or white. Impurities may color it orange, brownish, gray, yellowish, pink, or reddish. It has perfect cleavage on [010] and [110] and its fracture is conchoidal. It is very brittle. The Mohs scale hardness is 3.5-4. It has a vitreous luster and a white streak. It is found in hydrothermal deposits left in calcareous rocks, often formed as a result of secondary mineralization. Host rock types include basalt, andesite, metamorphic rocks and granites. It forms at a temperature of about , and becomes unstable above about , and so its presence in sedimentary rocks indicates that these have experienced intermediate diagenesis.
Excerpted from Wikipedia’s “laumontite” article, available under the CC BY-SA 4.0 licence.
Gallery (2)
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