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Ferrotaaffeite-6N'3S

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Formula:
(Be,Zn,Mg)FeAl
 
4
O
 
8
Hardness:8 - 8½


Taaffeite Group.

Classification of Ferrotaaffeite-6N'3S

IMA status:Approved
Strunz 8th edition ID:4/B.07-40

4 : Oxides & Hydroxides
B : Oxides with metal : oxygen = 3:4 (spinel type M3O4 and related), Alumina-Spinels
07 : Chrysoberyl - Swedenborgite series
Dana 8th edition ID:7.2.12.2

7 : MULTIPLE OXIDES
2 : AB2X4
Hey's CIM Ref.:16.6.8

16 : Silicates Containing Aluminum and other Metals
6 : Aluminosilicates of Be
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Type Occurrence of Ferrotaaffeite-6N'3S

Type Locality:Rosendal pegmatite, Kemiö (Kimito) Island, Western Finland Province, Finland

Physical Properties of Ferrotaaffeite-6N'3S

Hardness (Mohs):8 - 8½

Optical Data of Ferrotaaffeite-6N'3S

Type:Uniaxial (-)

Chemical Properties of Ferrotaaffeite-6N'3S

Formula:
(Be,Zn,Mg)FeAl
 
4
O
 
8
Essential elements:Al, Be, Fe, O
All elements listed in formula:Al, Be, Fe, Mg, O, Zn

Relationship of Ferrotaaffeite-6N'3S to other Species

Structurally related to group(s):
Taaffeite Group
Related Minerals - Strunz Grouping):

- +
4/B.07-10Chrysoberyl
BeAl
 
2
O
 
4
4/B.07-20Magnesiotaaffeite-2N’2S
Mg
 
3
Al
 
8
BeO
 
16
4/B.07-30Magnesiotaaffeite-6N’3S
Mg
 
2
BeAl
 
6
O
 
12
4/B.07-50Swedenborgite
NaBe
 
4
Sb
5+
 
O
 
7
Related Minerals - Hey's Index Grouping:

- +
16.6.1Beryl
Be
 
3
Al
 
2
(Si
 
6
O
 
18
)
16.6.2Euclase
BeAl(SiO
 
4
)(OH)
16.6.3Bavenite
Ca
 
4
Be
 
2
Al
 
2
Si
 
9
O
 
26
(OH)
 
2
16.6.4Aminoffite
Ca
 
2
(Be,Al)(Si
 
2
O
 
7
)(H
 
2
O,OH)
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

Other Names for Ferrotaaffeite-6N'3S

Synonyms:
Ferrotaaffeite-6N3SPehrmanite
Other Languages:
German:Pehrmanit
Russian:Ферротаафеит-6N'3S
Spanish:Pehrmanita

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 Ferrotaaffeite-6N'3S

Reference List:

- +
Burke, E. A. J. & Lustenhouwer, W. J. (1981): Pehrmanite, a new beryllium mineral from Rosendal pegmatite, Kemio Island, southwestern Finland. Canadian Mineralogist, 19, 311-314. [Pehrmanite was former name of ferrotaafeeite-6N'3S].

European Journal of Mineralogy: 14: 389-395.

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    • Localities for Ferrotaaffeite-6N'3S

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    (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.
    Finland
     
    • Western Finland Province
      • Kemiö (Kimito) Island
    		Can Min (1981) 19:311-341
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