Mindat Logo

Andesine

Formula:
(Na,Ca)[Al(Si,Al)Si
 
2
O
 
8
]
System:TriclinicColour:White, grey, greenish, ...
Lustre:Sub-VitreousHardness:6 - 6½
A variety of Albite

A Plagioclase Feldspar with an Albite : Anorthite molar ratio ranging from 50 : 50 to 70 : 30.

Originally described from Marmato Mine, Marmato, Cauca, Chocó Department, Colombia.

Classification of Andesine

Strunz 8th edition ID:8/J.07-40
Nickel-Strunz 10th (pending) edition ID:9.FA.35

9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
A : Tektosilicates without additional non-tetrahedral anions
mindat.org URL:http://www.mindat.org/min-220.html
Please feel free to link to this page.

Physical Properties of Andesine

Lustre:Sub-Vitreous
Diaphaneity (Transparency):Translucent on thin edges
Colour:White, grey, greenish, yellowish, etc.
Streak:White
Hardness (Mohs):6 - 6½
Cleavage:Perfect
Fracture:Step-Like

Crystallography of Andesine

Crystal System:Triclinic

Optical Data of Andesine

Type:Biaxial (+/-)
RI values: nα = 1.543 - 1.554 nβ = 1.547 - 1.559 nγ = 1.552 - 1.562
2V:Measured: 76° to 83°, Calculated: 78° to 84°
Maximum Birefringence:δ = 0.009

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:none

Chemical Properties of Andesine

Formula:
(Na,Ca)[Al(Si,Al)Si
 
2
O
 
8
]
Essential elements:
All elements listed in formula:Al, Ca, Na, O, Si

Relationship of Andesine to other Species

Related Minerals - Nickel-Strunz Grouping):
9.FA.IMA2007-049
NaAlSi
 
3
O
 
8
9.FA.05Kaliophilite
K[AlSiO
 
4
]
9.FA.05Kalsilite
K[AlSiO
 
4
]
9.FA.05Nepheline
(Na,K)[AlSiO
 
4
]
9.FA.05Panunzite
(Na,K)[AlSiO
 
4
]
9.FA.05Trikalsilite
(Na,K)[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.30Adularia
KAlSi
 
3
O
 
8
9.FA.30Anorthoclase
(Na,K)[AlSi
 
3
O
 
8
]
9.FA.30Buddingtonite
(NH
 
4
)[AlSi
 
3
O
 
8
]
9.FA.30Celsian
Ba[Al
 
2
Si
 
2
O
 
8
]
9.FA.30Hyalophane
(K,Ba)[Al(Si,Al)Si
 
2
O
 
8
]
9.FA.30Microcline
K[AlSi
 
3
O
 
8
]
9.FA.30Orthoclase
K[AlSi
 
3
O
 
8
]
9.FA.30Sanidine
K[AlSi
 
3
O
 
8
]
9.FA.30Rubicline
(Rb,K)[AlSi
 
3
O
 
8
]
9.FA.30Kokchetavite
KAlSi
 
3
O
 
8
9.FA.30Monalbite
Na[AlSi
 
3
O
 
8
]
9.FA.35Albite
Na[AlSi
 
3
O
 
8
]
9.FA.35Anorthite
Ca[Al
 
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.35Lingunite
(Na,Ca)AlSi
 
3
O
 
8
9.FA.40Paracelsian
Ba[Al
 
2
Si
 
2
O
 
8
]
9.FA.45Svyatoslavite
Ca[Al
 
2
Si
 
2
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
Ca[BSiO
 
4
]
 
2
9.FA.65Maleevite
BaB
 
2
Si
 
2
O
 
8
9.FA.65Pekovite
SrB
 
2
Si
 
2
O
 
8

Other Names for Andesine

Synonyms:
Andesite (of Dana)
Russian names:
Андезин

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 Andesine

Reference List:Richet, P. and Bottinga, Y. (1984b) Anorthite, andesine, wollastonite, diopside, cordierite, and pyrope thermodynamics of melting, glass transitions, and properties of the amorphous phases. Earth and Planetary Science Letters: 67: 415-432.

Internet Links for Andesine

Search Engines:
  • Look for Andesine on Google
  • Look for Andesine images on Google
  • External Links:
  • Andesine details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • Wright's Rock Shop - excellent mineral specimens since 1970
  • Buy Fine Minerals from mineralsweb.com
  • Find Andesine on www.crystalclassics.co.uk
  • Buy from David K Joyce minerals
  • Lapis Mineral Magazin
  • Buy Minerals and Crystals from Crystalarium.com
  • High-end worldwide specimens & outstanding customer service
  • The Arkenstone - Fine Minerals
  • e-Rocks - Mineral Auctions and Sales
  • Search for Andesine on minvision.com
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Wilensky Fine Minerals
  • Jobs:
  • Mining & Geology Jobs
  • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to find out how you can sponsor this page.

    Localities for Andesine

    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.
    These maps work faster with Firefox!
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon & Ida Ralph 1993-2008. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register.