Agrellite: Difference between revisions
Content deleted Content added
→top: link IMA |
→top: links, ce |
||
| (9 intermediate revisions by 6 users not shown) | |||
| Line 5: | Line 5: | ||
| caption = Agrellite showing fluorescence in ultraviolet light |
| caption = Agrellite showing fluorescence in ultraviolet light |
||
| formula = NaCa<sub>2</sub>Si<sub>4</sub>O<sub>10</sub>F |
| formula = NaCa<sub>2</sub>Si<sub>4</sub>O<sub>10</sub>F |
||
|IMAsymbol=Are<ref>{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|journal=Mineralogical Magazine|volume=85|issue=3|pages=291–320|doi=10.1180/mgm.2021.43|bibcode=2021MinM...85..291W|s2cid=235729616|doi-access=free}}</ref> |
|||
| molweight = |
| molweight = |
||
| strunz = 9.DH.75 |
| strunz = 9.DH.75 |
||
| Line 32: | Line 33: | ||
}} |
}} |
||
'''Agrellite''' ([[Sodium|Na]][[Calcium|Ca]]<sub>2</sub>[[Silicon|Si]]<sub>4</sub>[[Oxygen|O]]<sub>10</sub>[[Fluorine|F]]) is a rare triclinic inosilicate [[mineral]] with four-periodic single chains of silica tetrahedra. |
|||
'''Agrellite''' ([[sodium|Na]][[calcium|Ca]]<sub>2</sub>[[silicon|Si]]<sub>4</sub>[[oxygen|O]]<sub>10</sub>[[fluorine|F]]) is a [[mineral]] found in [[Quebec]], [[Canada]] and a few other locations. The [[International Mineralogical Association|IMA]] symbol is Are.<ref>{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA-CNMNC approved mineral symbols|url=https://www.cambridge.org/core/journals/mineralogical-magazine/article/imacnmnc-approved-mineral-symbols/62311F45ED37831D78603C6E6B25EE0A|journal=Mineralogical Magazine|volume=85|pages=291-320}}</ref> Agrellite displays pink [[fluorescence]] under both shortwave and longwave [[ultraviolet light]].<ref>[http://rruff.geo.arizona.edu/doclib/hom/agrellite.pdf Handbook of Mineralogy]</ref> It is named in honour of [[Stuart Olof Agrell]] (1913–1996).<ref>first reported in the Canadian Mineralogist (1976), vol. 14, pp. 120-126</ref> |
|||
It is a white to grey translucent mineral, with a pearly luster and white streak. It has a Mohs hardness of 5.5 and a specific gravity of 2.8. Its type locality is the Kipawa Alkaline Complex, [[Quebec]], [[Canada]], where it occurs as tabular laths in [[pegmatite]] lenses.<ref name=":0">{{Cite web|title=Agrellite|url=https://www.mindat.org/min-57.html|access-date=2021-12-08|website=www.mindat.org}}</ref> Other localities include Murmansk Oblast, Russia, Dara-i-Pioz Glacier, Tajikistan, and Saima Complex, Liaoning, China.<ref name=":0" /> Common associates at the type locality include [[zircon]], [[eudialyte]], [[vlasovite]], miserite, mosandrite-(Ce), and [[calcite]].<ref name=":0" /> |
|||
Agrellite displays pink [[fluorescence]] strongly under shortwave and weakly under longwave [[ultraviolet light]].<ref>{{Cite web|title=Handbook of Mineralogy|url=http://www.handbookofmineralogy.org/|access-date=2021-12-08|website=www.handbookofmineralogy.org}}</ref><ref name=":1">{{Cite web|title=Luminescence, fluorescence and phosphorescence of minerals|url=https://www.fluomin.org/uk/fiche.php?id=62|access-date=2021-12-08|website=www.fluomin.org}}</ref> The fluorescent activator is dominantly Mn<sup>2+</sup>, with minor Eu<sup>2+</sup>, Sm<sup>3+</sup>, and Dy<sup>3+</sup>.<ref name=":1" /> |
|||
It is named in honor of [[Stuart Olof Agrell]] (1913–1996), a British mineralogist at Cambridge University. |
|||
==See also== |
|||
* [[List of minerals]] |
|||
* [[List of minerals named after people]] |
|||
==References== |
==References== |
||
Latest revision as of 04:39, 13 January 2024
| Agrellite | |
|---|---|
 Agrellite showing fluorescence in ultraviolet light | |
| Allgemein | |
| Kategorie | Inosilicates |
| Formula (repeating unit) | NaCa2Si4O10F |
| IMA symbol | Are[1] |
| Strunz classification | 9.DH.75 |
| Crystal system | Triclinic |
| Crystal class | Pinacoidal (1) (same H-M symbol) |
| Space group | P1 |
| Identification | |
| Color | White, grayish-white, greenish-white |
| Crystal habit | Lath - shaped like a small, thin plaster lath, rectangular in shape |
| Cleavage | perfect [110] |
| Mohs scale hardness | 5.5 |
| Luster | pearly |
| Streak | white |
| Diaphaneity | translucent |
| Specific gravity | 2.88 |
| Optical properties | biaxial |
| Refractive index | nα = 1.567 nβ = 1.579 nγ = 1.581 |
| Birefringence | δ = 0.014 |
| References | [2][3] |
Agrellite (NaCa2Si4O10F) is a rare triclinic inosilicate mineral with four-periodic single chains of silica tetrahedra.
It is a white to grey translucent mineral, with a pearly luster and white streak. It has a Mohs hardness of 5.5 and a specific gravity of 2.8. Its type locality is the Kipawa Alkaline Complex, Quebec, Canada, where it occurs as tabular laths in pegmatite lenses.[4] Other localities include Murmansk Oblast, Russia, Dara-i-Pioz Glacier, Tajikistan, and Saima Complex, Liaoning, China.[4] Common associates at the type locality include zircon, eudialyte, vlasovite, miserite, mosandrite-(Ce), and calcite.[4]
Agrellite displays pink fluorescence strongly under shortwave and weakly under longwave ultraviolet light.[5][6] The fluorescent activator is dominantly Mn2+, with minor Eu2+, Sm3+, and Dy3+.[6]
It is named in honor of Stuart Olof Agrell (1913–1996), a British mineralogist at Cambridge University.
See also
[edit]References
[edit]
Wikimedia Commons has media related to Agrellite.
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ http://www.mindat.org/min-57.html Mindat
- ^ http://www.webmineral.com/data/Agrellite.shtml Webmineral
- ^ a b c "Agrellite". www.mindat.org. Retrieved 2021-12-08.
- ^ "Handbook of Mineralogy". www.handbookofmineralogy.org. Retrieved 2021-12-08.
- ^ a b "Luminescence, fluorescence and phosphorescence of minerals". www.fluomin.org. Retrieved 2021-12-08.
 | This article about a specific silicate mineral is a stub. You can help Wikipedia by expanding it. |