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Mordenite

Zeolite mineral

Field	Value
name	Mordenite
image	Mordenite-178958.jpg
imagesize	260px
category	Tectosilicate minerals
group	Zeolite group
formula
IMAsymbol	Mor
strunz	9.GD.35
system	Orthorhombic
class	Pyramidal (mm2)
(same H-M symbol)
symmetry	Cmc21
references

(same H-M symbol) | length fast/slow =

Mordenite is a zeolite mineral with the chemical formula . and it is one of the six most abundant zeolites and is used commercially.

It was first described in 1864 by Henry How. He named it after the small community of Morden, Nova Scotia, Canada, along the Bay of Fundy, where it was first found.

Mordenite is orthorhombic (a,b,c unequal & all angles 90 degree). It crystallizes in the form of fibrous aggregates, masses, and vertically striated prismatic crystals. It may be colorless, white, or faintly yellow or pink. It has Mohs hardness of 5 and a density of 2.1 g/cm3. When it forms well developed crystals they are hairlike; very long, thin, and delicate.

Mordenite’s molecular structure is a framework containing chains of five-membered rings of linked silicate and aluminate tetrahedra (four oxygen atoms arranged at the points of a triangular pyramid about a central silicon or aluminium atom). Its high ratio of silicon to aluminum atoms makes it more resistant to attack by acids than most other zeolites.

Mordenite is one of the most abundant zeolites in altered volcanic deposits; it is found in volcanic rock such as rhyolite, andesite, and basalt. It is associated with other zeolites such as stilbite and heulandite. Good examples have been found in Iceland, India, Italy, Oregon, Washington, and Idaho.

Use

Synthetic Mordenite is used as a catalyst in the petrochemical industry for the acid-catalyzed isomerisation of alkanes and aromatics.
In New Zealand mordenite-bearing zeolitic tuff is dried and crushed to produce a variety of products including adsorbents for soaking up oil/chemical spills and animal wastes, animal feed supplements, water treatment, and sports turf and slow release fertilizer.
Sedimentary deposits of mordenite are present in several countries, especially in Bulgaria, Hungary, Japan and the United States. Quarried material is generally substantial, e.g., a recent estimate of the yearly production in Japan is 150,000 tons.
Apart from generic applications in the fields of agriculture and building industry (as dimension stone), uses are known as sorbent and molecular sieve
Gas separation processes are reported for the production of high-grade O2 from air by pressure-swing operating generators. Full-scale plants based on mordenite-rich tuffs have been operating in Japan since the end of the 1960.

References

Warr, L.N.. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine.
[https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Mordenite Mineralienatlas]
(2005). "Ullmann's Encyclopedia of Industrial Chemistry".
[http://mineral.galleries.com/minerals/silicate/mordenit/mordenit.htm Mordenite information from Mineral galleries]
[http://webmineral.com/data/Mordenite.shtml Webmineral]
[http://www.mindat.org/show.php?id=2779&ld=1&pho= Mindat with location data]
It is also found in marine sediments, as in the Ural Mountains and in dikes where water has attacked and altered [[volcanic glass]]es, as on the Isle of Arran in Scotland.[http://www.britannica.com/EBchecked/topic/391980/mordenite "mordenite"] Encyclopædia Britannica. 2009. Encyclopædia Britannica Online. Access date 15 Apr. 2009
{{Citation. Colella. R.. (2005). Elsevier

Info: Wikipedia Source

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calcium-minerals sodium-minerals potassium-minerals aluminium-minerals zeolite-group orthorhombic-minerals minerals-in-space-group-36

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