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Aminoffite

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Långban, Filipstad, Värmland, Sweden
© Knut Eldjarn

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Formula:
Ca
 
2
(Be,Al)Si
 
2
O
 
7
(OH)·H
 
2
O
System:TetragonalHardness:5½
This page provides mineralogical data about Aminoffite.

Classification of Aminoffite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/C.29-10
Nickel-Strunz 10th (pending) edition ID:9.BH.05

9 : SILICATES (Germanates)
B : Sorosilicates
H : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in tetrahedral [4] and greater coordination
Dana 8th edition ID:57.1.1.1

57 : SOROSILICATES Si3O10 Groups and Larger Noncyclic Groups
1 : Insular Si3O10 and Larger Noncyclic Groups with [Si3O10] groups
Hey's CIM Ref.:16.6.4

16 : Silicates Containing Aluminum and other Metals
6 : Aluminosilicates of Be
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Type Occurrence of Aminoffite

Type Locality:Långban, Filipstad, Värmland, Sweden
Year of Discovery:1937

Physical Properties of Aminoffite

Hardness (Mohs):5½

Crystallography of Aminoffite

Crystal System:Tetragonal
Cell Parameters:a = 9.8Å, c = 9.91Å
Ratio:a:c = 1 : 1.011
Unit Cell Volume:V 951.76 ų (Calculated from Unit Cell)

Optical Data of Aminoffite

Type:Uniaxial (-)
RI values: nω = 1.647 nε = 1.637
Maximum Birefringence:δ = 0.010

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate

Chemical Properties of Aminoffite

Formula:
Ca
 
2
(Be,Al)Si
 
2
O
 
7
(OH)·H
 
2
O
Essential elements:Be, Ca, H, O, Si
All elements listed in formula:Al, Be, Ca, H, O, Si
Common Impurities:Fe,Mn

Relationship of Aminoffite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.BH.10Kinoite
Ca
 
2
Cu
 
2
(H
 
2
O)
 
2
[Si
 
3
O
 
10
]
9.BH.15Akatoreite
(Mn
2+
 
,Fe
2+
 
)
 
9
Al
 
2
[(OH)
 
3
|HSi
 
4
O
 
13
]
 
2
9.BH.20Fencooperite
Ba
 
6
Fe
3+
3
Si
 
8
O
 
23
(CO
 
3
)
 
2
Cl
 
3
·H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
16.6.1Beryl
Be
 
3
Al
 
2
Si
 
6
O
 
18
16.6.2Euclase
BeAl[OH|SiO
 
4
]
16.6.3Bavenite
Ca
 
4
Be
 
2
Al
 
2
Si
 
9
O
 
26
(OH)
 
2
16.6.5Milarite
K
 
2
Ca
 
4
Al
 
2
Be
 
4
Si
 
24
O
 
60
·H
 
2
O
16.6.6Lovdarite
(Na,K,Ca)
 
4
(Be,Al)
 
2
Si
 
6
O
 
16
·4H
 
2
O
16.6.7Surinamite
(Mg,Fe)
 
3
Al
 
4
BeSi
 
3
O
 
16
16.6.8Ferrotaaffeite-6N'3S
(Be,Zn,Mg)FeAl
 
4
O
 
8

Other Names for Aminoffite

Other Languages:
German:Aminoffit
Russian:Аминовит
Spanish:Aminoffita

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 Aminoffite

Reference List:American Mineralogist: 23: 293.

Internet Links for Aminoffite

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  • Raman and XRD data at RRUFF project
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    Localities for Aminoffite

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    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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Sweden
     
    • Värmland
      • Filipstad
    		GFF (1937) 59, 290-292; Nysten, P., Holtstam, D. and Jonsson, E. (1999) The Långban minerals. In Långban - The mines,their minerals, geology and explorers (D. Holtstam and J. Langhof, eds.), Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, pp. 89-183.
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. 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. Current server date and time: 7th Nov 2009 00:53:42