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Ferrotaaffeite-2N’2S

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Formula:
Be(Fe,Mg,Zn)3Al8O16
Colour:
dark green to dark grey
Lustre:
Vitreous
Hardness:
8½ - 9
Specific Gravity:
3.99 (Calculated)
Crystal System:
Hexagonal
Name:
For the mineral taaffeite and its iron content.
This page provides mineralogical data about Ferrotaaffeite-2N’2S.


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Classification of Ferrotaaffeite-2N’2SHide

Approved
Approval Year:
2011

Physical Properties of Ferrotaaffeite-2N’2SHide

Vitreous
Transparency:
Transparent
Colour:
dark green to dark grey
Streak:
white
Hardness:
8½ - 9 on Mohs scale
Hardness:
VHN50= 2107 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
Imperfect/Fair
{001}
Fracture:
Conchoidal
Density:
3.99 g/cm3 (Calculated)

Chemical Properties of Ferrotaaffeite-2N’2SHide

Formula:
Be(Fe,Mg,Zn)3Al8O16
IMA Formula:
(Fe2+,Mg,Zn)3Al8BeO16

Crystallography of Ferrotaaffeite-2N’2SHide

Crystal System:
Hexagonal
Class (H-M):
6mm - Dihexagonal Pyramidal
Space Group:
P63mc
Cell Parameters:
a = 5.706(8) Å, c = 18.352(3) Å
Ratio:
a:c = 1 : 3.216
Unit Cell V:
517.46 ų (Calculated from Unit Cell)
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.86(80)
2.60(90)
2.43(100)
2.05(70)
1.595(70)
1.473(80)
1.425(90)
(

Type Occurrence of Ferrotaaffeite-2N’2SHide

General Appearance of Type Material:
tabular crystals to a size of about 100 μm
Place of Conservation of Type Material:
Museum of the Institute of Geology and Geophysics, Chinese Academy of Sciences,Beijing, registration number KDX017
Geological Setting of Type Material:
Tin deposit outside of a granite contact
Associated Minerals at Type Locality:

Synonyms of Ferrotaaffeite-2N’2SHide

Relationship of Ferrotaaffeite-2N’2S to other SpeciesHide

Other Members of this group:
Ferrotaaffeite-6N'3S(Be,Zn,Mg)FeAl4O8Trig.
Magnesiotaaffeite-2N’2SMg3Al8BeO16Hex. 6/mmm (6/m 2/m 2/m)
Magnesiotaaffeite-2N’2S2Mg3BeAl8O16Trig. 3m (3 2/m) : P3m1
Magnesiotaaffeite-6N’3SMg2BeAl6O12Trig.

Fluorescence of Ferrotaaffeite-2N’2SHide

Other InformationHide

Health Risks:
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-2N’2SHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Zhuming, Y., Kuishou, D., de Fourestier, J., Qian, M. and He, L. (2011): Ferrotaaffeite-2N’2S, IMA 2011-025. CNMNC Newsletter No. 10, October 2011, page 2554
Yang, Z., Ding, K., De Fourestier, J., Mao, Q., & Li, H. (2012). Ferrotaaffeite-2N’2S, a new mineral species, and the crystal structure of Fe2+-rich magnesiotaaffeite-2N’2S from the Xianghualing tin-polymetallic ore field, Hunan Province, China. The Canadian Mineralogist, 50(1), 21-29.

Internet Links for Ferrotaaffeite-2N’2SHide

Localities for Ferrotaaffeite-2N’2SHide

ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
China (TL)
 
  • Hunan Province
    • Chenzhou Prefecture
      • Linwu Co.
Zhuming, Y., Kuishou, D., de Fourestier, J., Qian, M. and He, L. (2011): Ferrotaaffeite-2N’2S, IMA 2011-025. CNMNC Newsletter No. 10, October 2011, page 2554
Mineral and/or Locality  
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