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Adularia

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Formula:
KAlSi
 
3
O
 
8
System:Monoclinic
Name:Named in 1780 by Ermenegildo Pini for the type locality, the Adula Massif (part of the Gotthard massif), Switzerland.
A variety of K Feldspar

A more ordered low-temperature variety of Orthoclase or partially disordered Microcline. Individual localities should be verified because the adularia structural state is nearly equally represented by microcline and orthoclase specimens. Generally found in alpine-type parageneses.

Originally described from the Adula Massif, Ticino (Tessin), Switzerland.

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Classification of Adularia

Nickel-Strunz 10th (pending) edition ID:9.FA.30

9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
A : Tektosilicates without additional non-tetrahedral anions
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Crystallography of Adularia

Crystal System:Monoclinic

Chemical Properties of Adularia

Formula:
KAlSi
 
3
O
 
8
Simplified for copy/paste:KAlSi3O8
Essential elements:Al, K, O, Si
All elements listed in formula:Al, K, O, Si

Relationship of Adularia to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.FA.05Kaliophilite
KAlSiO
 
4
9.FA.05Kalsilite
KAlSiO
 
4
9.FA.05Nepheline
(Na,K)AlSiO
 
4
9.FA.05Panunzite
(K,Na)AlSiO
 
4
9.FA.05Trikalsilite
(K,Na)AlSiO
 
4
9.FA.05Yoshiokaite
(Ca,Na)[Al(Al,Si)O
 
4
]
9.FA.05Megakalsilite
KAlSiO
 
4
9.FA.10Malinkoite
NaBSiO
 
4
9.FA.15Virgilite
LiAlSi
 
2
O
 
6
9.FA.25Lisitsynite
KBSi
 
2
O
 
6
9.FA.30Anorthoclase
(Na,K)AlSi
 
3
O
 
8
9.FA.30Buddingtonite
(NH
 
4
)AlSi
 
3
O
 
8
9.FA.30Celsian
BaAl
 
2
Si
 
2
O
 
8
9.FA.30Hyalophane
(K,Ba)[Al(Si,Al)Si
 
2
O
 
8
]
9.FA.30Microcline
KAlSi
 
3
O
 
8
9.FA.30Orthoclase
KAlSi
 
3
O
 
8
9.FA.30Sanidine
KAlSi
 
3
O
 
8
9.FA.30Rubicline
(Rb,K)AlSi
 
3
O
 
8
9.FA.30Monalbite
NaAlSi
 
3
O
 
8
9.FA.35Albite
NaAlSi
 
3
O
 
8
9.FA.35Andesine
(Na,Ca)[Al(Si,Al)Si
 
2
O
 
8
]
9.FA.35Anorthite
CaAl
 
2
Si
 
2
O
 
8
9.FA.35Bytownite
(Ca,Na)[Al(Al,Si)Si
 
2
O
 
8
]
9.FA.35Labradorite
(Ca,Na)[Al(Al,Si)Si
 
2
O
 
8
]
9.FA.35Oligoclase
(Na,Ca)[Al(Si,Al)Si
 
2
O
 
8
]
9.FA.35Reedmergnerite
Na[BSi
 
3
O
 
8
]
9.FA.40Paracelsian
BaAl
 
2
Si
 
2
O
 
8
9.FA.45Svyatoslavite
CaAl
 
2
Si
 
2
O
 
8
9.FA.45Kumdykolite
NaAlSi
 
3
O
 
8
9.FA.50Slawsonite
(Sr,Ca)Al
 
2
Si
 
2
O
 
8
9.FA.55Lisetite
CaNa
 
2
Al
 
4
Si
 
4
O
 
16
9.FA.60Banalsite
BaNa
 
2
[Al
 
2
Si
 
2
O
 
8
]
 
2
9.FA.60Stronalsite
SrNa
 
2
[Al
 
2
Si
 
2
O
 
8
]
 
2
9.FA.65Danburite
CaB
 
2
Si
 
2
O
 
8
9.FA.65Maleevite
BaB
 
2
Si
 
2
O
 
8
9.FA.65Pekovite
SrB
 
2
Si
 
2
O
 
8
9.FA.70Lingunite
(Na,Ca)AlSi
 
3
O
 
8
9.FA.75Kokchetavite
KAlSi
 
3
O
 
8

Other Names for Adularia

Synonyms:
Adulare
Other Languages:
Anglo-Saxon:Adularia
Finnish:Adulaari
French:Adulaire
German:Adular
Hystatischer Monophan
Italian:Adularia
Polish:Adular
Simplified Chinese:冰长石
Ukrainian:Адуляр
Varieties:
Barium-AdulariaValencianite

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Adularia

Reference List:

- +
Dal Negro, A., De Pieri, R., Quareni, S., Taylor, W.H. (1978) The crystal structures of nine K feldspars from the Adamello Massif (Northern Italy). Acta Crystallographica, B34, 2699-2707.

Internet Links for Adularia

Search Engines:
  • Look for Adularia on Google
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  • Mineral Dealers:
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  • Adularia specimens for sale - minfind.com
  • Fine minerals from bisbeeborn.com
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Fabre Minerals - search for Adularia specimens
  • Search for Adularia on Well-Arranged Molecules
  • Buy fine minerals and gemstones from Pala International
  • The Arkenstone - Fine Minerals
  • Top quality minerals from Kristalle of California
  • rare and unusual minerals mainly crystallized
  • Specimens:The following Adularia specimens are currently listed for sale on minfind.com.

    Localities for Adularia

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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