Magnesiotaaffeite-6N’3S
A valid IMA mineral species
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About Magnesiotaaffeite-6N’3S
Formula:
Mg2BeAl6O12
Colour:
Colorles to pale shades of olive-green
Lustre:
Vitreous, Sub-Vitreous
Hardness:
8 - 8½
Crystal System:
Trigonal
Member of:
Name:
Re-defined by Armbruster et al. (2002) as a polysome of magnesiotaaffeite. Prior to that it was known as musgravite. The root name is in honor of Count Edward Charles Richard Taaffe, gemologist of Dublin (1898, Bohemia - 1967).
Visit gemdat.org for Unique Identifiers
Mindat ID:
2816
Long-form identifier:
mindat:1:1:2816:1
GUID
(UUID V4):
(UUID V4):
96e39b1a-cd8c-42ac-951d-fc6b50b17b11
IMA Classification of Magnesiotaaffeite-6N’3S
Approved
Classification of Magnesiotaaffeite-6N’3S
4.FC.25
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
C : Hydroxides with OH, without H2O; corner-sharing octahedra
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
C : Hydroxides with OH, without H2O; corner-sharing octahedra
7.2.12.1
7 : MULTIPLE OXIDES
2 : AB2X4
7 : MULTIPLE OXIDES
2 : AB2X4
7.4.6
7 : Oxides and Hydroxides
4 : Oxides of Be, Mg and the alkaline earths
7 : Oxides and Hydroxides
4 : Oxides of Be, Mg and the alkaline earths
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Mtf- 6N'3S | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Mta | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Magnesiotaaffeite-6N’3S
Vitreous, Sub-Vitreous
Transparency:
Transparent, Translucent
Colour:
Colorles to pale shades of olive-green
Streak:
colorless
Hardness:
8 - 8½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{0001}
{0001}
Optical Data of Magnesiotaaffeite-6N’3S
Type:
Uniaxial (-)
RI values:
nω = 1.739 nε = 1.735
Birefringence:
0.004
Max Birefringence:
δ = 0.004
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
High
Pleochroism:
Non-pleochroic
Chemistry of Magnesiotaaffeite-6N’3S
Mindat Formula:
Mg2BeAl6O12
Elements listed:
Crystallography of Magnesiotaaffeite-6N’3S
Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
R3m
Cell Parameters:
a = 5.67 Å, c = 41.09 Å
Ratio:
a:c = 1 : 7.247
Unit Cell V:
1,144.02 ų (Calculated from Unit Cell)
Z:
6
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites | |
| Stage 5: Initiation of plate tectonics | <3.5-2.5 |
| 40 : Regional metamorphism (greenschist, amphibolite, granulite facies) |
Type Occurrence of Magnesiotaaffeite-6N’3S
General Appearance of Type Material:
Light colored vitreous translucent mineral
Associated Minerals at Type Locality:
Synonyms of Magnesiotaaffeite-6N’3S
Other Language Names for Magnesiotaaffeite-6N’3S
Relationship of Magnesiotaaffeite-6N’3S to other Species
Member of:
Other Members of this group:
| Magnesiotaaffeite-2N’2S | Mg3Al8BeO16 | Hex. 6/mmm (6/m 2/m 2/m) |
| Magnesiotaaffeite-2N’2S2 | Mg3BeAl8O16 | Trig. 3m (3 2/m) : P3m1 |
Common Associates
Associated Minerals Based on Photo Data:
| 2 photos of Magnesiotaaffeite-6N’3S associated with Pseudosinhalite | Mg2Al3(BO3)2(OH)O3 |
| 2 photos of Magnesiotaaffeite-6N’3S associated with Spinel | MgAl2O4 |
| 1 photo of Magnesiotaaffeite-6N’3S associated with Magnetite | Fe2+Fe3+2O4 |
| 1 photo of Magnesiotaaffeite-6N’3S associated with Sillimanite | Al2(SiO4)O |
Related Minerals - Strunz-mindat Grouping
| 4.FC.05 | Bernalite | Fe(OH)3 · nH2O (n = 0.0 to 0.25) |
| 4.FC.05 | Dzhalindite | In(OH)3 |
| 4.FC.05 | Söhngeite | Ga(OH)3 |
| 4.FC.10 | Burtite | Ca[Sn(OH)6] |
| 4.FC.10 | Mushistonite | (Cu,Zn,Fe2+)[Sn(OH)6] |
| 4.FC.10 | Natanite | Fe2+[Sn(OH)6] |
| 4.FC.10 | Schoenfliesite | Mg[Sn(OH)6] |
| 4.FC.10 | Vismirnovite | Zn[Sn(OH)6] |
| 4.FC.10 | Wickmanite | Mn2+[Sn(OH)6] |
| 4.FC.15 | Jeanbandyite | Fe3+xFe2+1-xSn(OH)6-xOx |
| 4.FC.15 | Mopungite | Na[Sb5+(OH)6] |
| 4.FC.15 | Stottite | Fe2+[Ge4+(OH)6] |
| 4.FC.15 | Tetrawickmanite | Mn2+[Sn4+(OH)6] |
| 4.FC.20 | Ferronigerite-2N1S | (Al,Fe,Zn)2(Al,Sn)6O11(OH) |
| 4.FC.20 | Magnesionigerite-6N6S | (Mg,Al,Zn)3(Al,Sn,Fe)8O15(OH) |
| 4.FC.20 | Magnesionigerite-2N1S | (Mg,Al,Zn)2(Al,Sn)6O11(OH) |
| 4.FC.20 | Ferronigerite-6N6S | (Al,Fe,Zn)3(Al,Sn,Fe)8O15(OH) |
| 4.FC.20 | Zinconigerite-2N1S | (Zn,Al,Mg)2(Al,Sn)6O11(OH) |
| 4.FC.20 | Zinconigerite-6N6S | Zn3Sn2Al16O30(OH)2 |
| 4.FC.25 | Magnesiotaaffeite-2N’2S | Mg3Al8BeO16 |
| 4.FC.25 | Ferrotaaffeite-2N’2S | Be(Fe,Mg,Zn)3Al8O16 |
Fluorescence of Magnesiotaaffeite-6N’3S
Unknown if any has been tested in UV
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Magnesiotaaffeite-6N’3S
mindat.org URL:
https://www.mindat.org/min-2816.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
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References for Magnesiotaaffeite-6N’3S
Reference List:
Localities for Magnesiotaaffeite-6N’3S
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
Antarctica | |
| Grew et al. (2000) |
| Grew (1981) +2 other references | |
Australia (TL) | |
| MM 1967 |
Austria | |
| Bernhard (2008) |
France | |
| Dubru. M (1986) |
Greenland | |
| Chadwick et al. (1993) +1 other reference |
Madagascar | |
| Devouard (2002) |
| fonjatany-mth.com (2016) |
Myanmar | |
| GIA/GIT gem testing & analysis. |
Sri Lanka | |
| GIA/GIT gem testing & analysis. |
Tanzania | |
| Schmetzer et al. (2007) |
Quick NavTopAbout Magnesiotaaffeite-6N’3SUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Geological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
"Zircon Point" pegmatite, Khmara Bay, Casey Bay, Napier Complex, Enderby Land, Eastern Antarctica, Antarctica