Alkali-beryl
A variety of Beryl
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About Alkali-beryl
Formula:
Be3Al2(Si6O18)
Name:
Name first used by L.J.Spencer (1922) in Min.Abstr. 1, 76 and 446
Variety of beryl high in alkalis (Li2O to 2%, Na2O to 4%, K2O to 2%, Rb2O to 1.3% and Cs2O to 4.6%)
See also:
Caesium beryl;
Rosterite;
Vorobyevite.
See also:
Caesium beryl;
Rosterite;
Vorobyevite.
Unique Identifiers
Mindat ID:
120 (as Alkali-beryl)
819 (as Beryl)
819 (as Beryl)
Long-form identifier:
mindat:1:1:120:9 (as Alkali-beryl)
mindat:1:1:819:6 (as Beryl)
mindat:1:1:819:6 (as Beryl)
Chemistry of Alkali-beryl
Mindat Formula:
Be3Al2(Si6O18)
Element Weights:
Elements listed:
Chemical Analysis
Oxide wt%:
| 1 | |
|---|---|
| SiO2 | 64.56 % |
| Al2O3 | 17.31 % |
| Fe2O3 | 0.07 % |
| FeO | 0.66 % |
| BeO | 11.64 % |
| CaO | 0.25 % |
| MgO | 0.04 % |
| Na2O | 1.66 % |
| K2O | 0.08 % |
| P2O5 | 0.01 % |
| Li2O | 0.63 % |
| Cs2O | 0.89 % |
| Rb2O | 0.09 % |
| Total: | 97.89 % |
Sample references:
Synonyms of Alkali-beryl
Other Language Names for Alkali-beryl
French:Béryl riche en alcalis
Varieties of Alkali-beryl
| Caesium Beryl | The term 'caesium beryl' refers to a caesium-bearing beryl. The names vorobyevite and rosterite have both been used to refer to such material, however the use of these names should be discouraged. |
| Rosterite | An alkali beryl from San Piero in Campo, Elba, Italy. Described as a new species by Grattarola (1880). Discredited by Zambonini and Caglioti (1928) and recognised as an alkali beryl with 0.4% Li2O, 4.2% Na2O, 2.25% K2O and 0.9% Cs2O. Similar to vorobyev... |
Common Associates
Associations Based on Photo Data:
| 11 photos of Alkali-beryl associated with Tourmaline | AD3G6(T6O18)(BO3)3X3Z |
| 11 photos of Alkali-beryl associated with Elbaite | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH) |
| 8 photos of Alkali-beryl associated with 'Smoky Quartz' | SiO2 |
| 6 photos of Alkali-beryl associated with 'Limonite' | |
| 5 photos of Alkali-beryl associated with Beryl | Be3Al2(Si6O18) |
| 4 photos of Alkali-beryl associated with Quartz | SiO2 |
| 3 photos of Alkali-beryl associated with 'Morganite' | Be3Al2(Si6O18) |
| 2 photos of Alkali-beryl associated with Lepidolite | |
| 1 photo of Alkali-beryl associated with Pollucite | (Cs,Na)2(Al2Si4O12) · 2H2O |
| 1 photo of Alkali-beryl associated with Albite | Na(AlSi3O8) |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Alkali-beryl
mindat.org URL:
https://www.mindat.org/min-120.html
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References for Alkali-beryl
Reference List:
Matsuda, Shunji (1960) Alkali Elements in Beryl. Journal of the Mineralogical Society of Japan, 4 (5) 398-403 doi:10.2465/gkk1952.4.398
Sarbajna, Chanchal; Sinha, R. P.; Krishnamurthy, P.; Krishna, K. V. G.; Viswanathan, R.; Banerjee, D. C. (1999) Mineralogy and Geochemistry of Alkali Beryl from the Rare Metal Bearing Pegmatites of Marlagalla-Allapatna, Mandya District, Karnataka. Journal Geological Society of India, 54 (6). 599-608 doi:10.17491/jgsi/1999/540603
Yakubovich, O. V., Pekov, I. V., Steele, I. M., Massa, W., Chukanov, N. V. (2009) Alkali metals in beryl and their role in the formation of derivative structural motifs: Comparative crystal chemistry of vorobyevite and pezzottaite. Crystallography Reports, 54 (3) 399-412 doi:10.1134/s1063774509030067
Morozova, Lyudmila N., Skublov, Sergey G., Zozulya, Dmitry R., Serov, Pavel A., Borisenko, Elena S., Solovjova, Anna N., Gavrilchik, Alexandra K. (2023) Li-Cs-Na-Rich Beryl from Beryl-Bearing Pegmatite Dike No. 7 of the Shongui Deposit, Kola Province, Russia. Geosciences, 13 (10) 309 doi:10.3390/geosciences13100309
Localities for Alkali-beryl
Showing 25 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Afghanistan | |
| Rob Lavinsky coll. analized by Federico ... +1 other reference |
| Orris et al. (2002) |
Australia | |
| Lishmund (1982) |
| |
| Jacobson et al. (2007) |
| Jacobson et al. (2007) | |
Brazil | |
| Revista Brasileira de Geociências 31 (l) |
India | |
| Sarbajna et al. (1999) |
Italy | |
| [Caesium Beryl var: Rosterite] G.Grattarola (1880) |
Madagascar | |
| [Caesium Beryl] Knut Edvard Larsen collection # M13 |
| Lacroix (1922) | |
| Lacroix (1922) | |
| [Caesium Beryl] Knut Edvard Larsen collection # M-107 |
| Lacroix (1922) |
Myanmar | |
| [Caesium Beryl] Martin Slama collection |
Poland | |
| [Caesium Beryl] Pieczka et al. (2015) +1 other reference |
Russia | |
| Igor Savin's data |
| Thomas et al. (2012) |
Tajikistan | |
| Oleg Lopatkin |
USA | |
| Schaller et al. (1962) +1 other reference |
| Rocks & Min. Vol.71 |
| [Caesium Beryl] S.L.Penfield (1888) |
| "Mineralogy of the Ray Mica Mine" by ... |
Deo Darrah, Kuran Wa Munjan District, Badakhshan, Afghanistan