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Magnesiotaaffeite-6N’3S

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Big Photo

Zircon point pegmatite, Khmara Bay, Casey Bay, Napier Complex, Enderby Land, Eastern Antarctica, Antarctica
© Pavel M. Kartashov

Show Magnesiotaaffeite-6N’3S Photos (4)



Formula:
Mg
 
2
BeAl
 
6
O
 
12
System:TrigonalHardness:8 - 8½


Taaffeite Group.

Classification of Magnesiotaaffeite-6N’3S

IMA status:Approved
Strunz 8th edition ID:4/B.07-30
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:7.2.12.1

7 : MULTIPLE OXIDES
2 : AB2X4
Hey's CIM Ref.:7.4.6

7 : Oxides and Hydroxides
4 : Oxides of Be, Mg and the alkaline earths
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Type Occurrence of Magnesiotaaffeite-6N’3S

Type Locality:Ernabella Mission, Musgrave Ranges, South Australia, Australia
Year of Discovery:1967

Physical Properties of Magnesiotaaffeite-6N’3S

Hardness (Mohs):8 - 8½

Crystallography of Magnesiotaaffeite-6N’3S

Crystal System:Trigonal
Cell Parameters:a = 5.67Å, c = 41.09Å
Ratio:a:c = 1 : 7.247
Unit Cell Volume:V 1,144.02 ų (Calculated from Unit Cell)

Optical Data of Magnesiotaaffeite-6N’3S

Type:Uniaxial (-)
RI values: nω = 1.739 nε = 1.735
Maximum Birefringence:δ = 0.004

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

Chemical Properties of Magnesiotaaffeite-6N’3S

Formula:
Mg
 
2
BeAl
 
6
O
 
12
Essential elements:Al, Be, Mg, O
All elements listed in formula:Al, Be, Mg, O

Relationship of Magnesiotaaffeite-6N’3S to other Species

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

- +
4.FC.05Bernalite
Fe(OH)
 
3
 · nH
 
2
O (n = 0.0 to 0.25)
4.FC.05Dzhalindite
In(OH)
 
3
4.FC.05Söhngeite
Ga(OH)
 
3
4.FC.10Burtite
Ca[Sn(OH)
 
6
]
4.FC.10Mushistonite
(Cu,Zn,Fe
2+
 
)[Sn(OH)
 
6
]
4.FC.10Natanite
Fe
2+
 
[Sn(OH)
 
6
]
4.FC.10Schoenfliesite
Mg[Sn(OH)
 
6
]
4.FC.10Vismirnovite
Zn[Sn(OH)
 
6
]
4.FC.10Wickmanite
Mn
2+
 
[Sn(OH)
 
6
]
4.FC.15Jeanbandyite
(Fe
2+
 
,Mn
2+
 
)[Sn
4+
 
(OH)
 
6
]
4.FC.15Mopungite
Na[Sb
5+
 
(OH)
 
6
]
4.FC.15Stottite
Fe
2+
 
[Ge
4+
 
(OH)
 
6
]
4.FC.15Tetrawickmanite
Mn
2+
 
[Sn
4+
 
(OH)
 
6
]
4.FC.20Ferronigerite-2N1S
Sn(Fe,Mg)Al
 
6
O
 
11
(OH)
4.FC.20Magnesionigerite-6N6S
Sn(Mg,Fe)
 
2
Al
 
8
O
 
15
(OH)
4.FC.20Magnesionigerite-2N1S
Sn(Mg,Fe)Al
 
6
O
 
11
(OH)
4.FC.20Ferronigerite-6N6S
Sn(Fe,Mg)
 
2
Al
 
8
O
 
15
(OH)
4.FC.20Zinconigerite-2N1S
Sn(Zn,Fe,Mg)Al
 
6
O
 
11
(OH)
4.FC.20Zinconigerite-6N6S
4.FC.25Magnesiotaaffeite-2N’2S
Mg
 
3
Al
 
8
BeO
 
16
Related Minerals - Hey's Index Grouping:

- +
7.4.1Bromellite
BeO
7.4.2Behoite
Be(OH)
 
2
7.4.3Clinobehoite
Be(OH)
 
2
7.4.4Chrysoberyl
BeAl
 
2
O
 
4
7.4.5Magnesiotaaffeite-2N’2S
Mg
 
3
Al
 
8
BeO
 
16
7.4.7Periclase
MgO
7.4.8Brucite
Mg(OH)
 
2
7.4.9Spinel
MgAl
 
2
O
 
4
7.4.10Meixnerite
Mg
 
6
Al
 
2
(OH)
 
18
 · 4H
 
2
O
7.4.11Lime
CaO
7.4.12Portlandite
Ca(OH)
 
2
7.4.13Mayenite
Ca
 
12
Al
 
14
O
 
33
7.4.14Hydrocalumite
Ca
 
2
Al(OH)
 
7
 · 2H
 
2
O
7.4.15Marokite
CaMn
 
2
O
 
4
7.4.16Ranciéite
(Ca,Mn)Mn
 
4
O
 
9
 · 3H
 
2
O
7.4.17Hollandite
Ba(Mn
4+
 
,Mn
2+
 
)
 
8
O
 
16
7.4.18Romanèchite
(Ba,H
 
2
O)
 
2
Mn
 
5
O
 
10
7.4.19Todorokite
(Ca,K,Na,Mg,Ba,Mn)(Mn,Mg,Al)
 
6
O
 
12
 · 3H
 
2
O

Other Names for Magnesiotaaffeite-6N’3S

Synonyms:
Magnesiotaaffeite-6N3SMusgravite
Other Languages:
German:Musgravit
Russian:Магнезиотаафеит-6N'3S
Мусгравит
Spanish:Musgravita

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 Magnesiotaaffeite-6N’3S

Reference List:

- +
Neues Jahrbuch für Mineralogie, Monatshefte (1983): 393-402.

Neues Jahrbuch für Mineralogie, Abhandlungen: 146: 15-28.

Kiefert & Schmetzer (1998) Distinction of taaffeite and musgravite. Journal of Gemmology: 26: 165-167.

European Journal of Mineralogy (2002): 14: 389-395.

Schmetzer et al (2005) Musgravites from Sri Lanka. Neues Jahrbuch Miner. Abh.: 181(3): 265-270 (localities).

Schmetzer et al (2005) Gem-quality musgravite from Sri Lanka. Journal of Gemmology: 29: 281-289.

Internet Links for Magnesiotaaffeite-6N’3S

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    • Localities for Magnesiotaaffeite-6N’3S

    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.
    Hide Locality List
    (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.
    Antarctica
     
    • Eastern Antarctica
      • Enderby Land
        • Napier Complex
          • Casey Bay
            • Khmara Bay
    		PLEASE ADD REFERENCE
    Grew, E. S. (1981): Surinamite, taafeite and beryllian sapphirine from pegmatites in granulite-facies rocks of Casey Bay, Enderby Land, Antarctica. American Mineralogist, 66, 1022-1033
    Australia
     
    • South Australia
      • Musgrave Ranges
    		MM 1967, 305-10
    Austria
     
    • Styria
      • Weiz
        • Stubenberg am See
    		Bernhard, F. et al. (2008)
    France
     
    • Languedoc-Roussillon
      • Pyrénées-Orientales
        • Céret
          • Prats de Mollo-La Preste (Prats de Molló-La Presta)
    		Dubru. M, (1986) Pétrologie et géochimie du marbre à brucite et des borates associés au gisement de tungstène de Costabonne, (Pyrénées orientales, France) 930p
    Greenland
    MinMag 57:121
    Madagascar
     
    • Fianarantsoa Province
      • Horombe Region
        • Ihosy District
    		B. Devouard et al. : "Occurrence of musgravite in anorthite-corundum-spinel-sapphirine rocks ("sakenites") from South Madagascar : Evidence for a high-grade metasomatic event". 18th General Meeting of the IMA, Sept. 2002, Edinburgh, Scotland.
    Tanzania
     
    • Ruvuma Region
    		Schmetzer,k.,Krzemnicki,M.,Hanni,H.,Bernhardt,H., and Pettke, T., (2007) Gem-quality taaffeites and musgravites from Africa, Journal of Gemmology, 30(7/8), 367-382.
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. 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. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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