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Magnesiotaaffeite-2N’2S

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Långban, Filipstad, Värmland, Sweden
© Kjell Gatedal

Show Magnesiotaaffeite-2N’2S Photos (10)



Formula:
Mg
 
3
Al
 
8
BeO
 
16
System:HexagonalLustre:Vitreous
Hardness:8 - 8½
Name:Originally named taaffeite for Count Edward Charles Taafe, gemologist of Dublin (b. 1898), who discovered the mineral in 1945.


Taaffeite Group.

Classification of Magnesiotaaffeite-2N’2S

IMA status:Approved
Strunz 8th edition ID:4/B.07-20
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:7.2.11.1

7 : MULTIPLE OXIDES
2 : AB2X4
Hey's CIM Ref.:7.4.5

7 : Oxides and Hydroxides
4 : Oxides of Be, Mg and the alkaline earths
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Type Occurrence of Magnesiotaaffeite-2N’2S

Type Locality:Niriella Village, Ratnapura, Ratnapura District, Sabaragamuwa Province, Sri Lanka
Year of Discovery:1951

Physical Properties of Magnesiotaaffeite-2N’2S

Lustre:Vitreous
Hardness (Mohs):8 - 8½
Cleavage:Imperfect/Fair
Fair {001}
Fracture:Conchoidal
Density (measured):3.605 g/cm3

Crystallography of Magnesiotaaffeite-2N’2S

Crystal System:Hexagonal
Class (H-M):6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Cell Parameters:a = 5.68Å, c = 18.33Å
Ratio:a:c = 1 : 3.227
Unit Cell Volume:V 512.14 ų (Calculated from Unit Cell)
Twinning:By reflection on (0001)?

Optical Data of Magnesiotaaffeite-2N’2S

Type:Uniaxial (+)
RI values: nω = 1.722 nε = 1.777
Maximum Birefringence:δ = 0.055

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

Chemical Properties of Magnesiotaaffeite-2N’2S

Formula:
Mg
 
3
Al
 
8
BeO
 
16
Essential elements:Al, Be, Mg, O
All elements listed in formula:Al, Be, Mg, O

Relationship of Magnesiotaaffeite-2N’2S 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-6N’3S
Mg
 
2
BeAl
 
6
O
 
12
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
7.4.6Magnesiotaaffeite-6N’3S
Mg
 
2
BeAl
 
6
O
 
12
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-2N’2S

Synonyms:
BemagaliteMagnesiotaaffeite-2N2STaaffeiteTaprobanite
Other Languages:
German:Bemagalit
Taaffeit
Taprobanit
Russian:Магнезиотаафеит-2N'2S
Spanish:Bemagalita
Taaffeita
Taprobanita

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-2N’2S

Reference List:

- +
Mineralogical Magazine (1951): 29: 765-772.

Kozhevnikov et al. (1975): First taaffeite in the USSR. Dokl. Akad. Nauk, SSSR, Earth Sci. Sect., 224, 120-121.

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

Schmetzer (1983): Crystal chemistry of natural Be-Mg-Al-oxides: taaffeite, taprobanite, musgravite. Neues Jahrbuch für Mineralogie, Abhandlungen: 146: 15-28.

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

Schmetzer et al (2005) Iron- and zinc rich gem-quality taaffeites from Sri Lanka. Journal of Gemmology: 29: 290-298.

Kampf, A. R. (1991) Taaffeite Crystals. Mineralogical Record 22:343-347

Internet Links for Magnesiotaaffeite-2N’2S

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    • Localities for Magnesiotaaffeite-2N’2S

    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.
    Australia
     
    • South Australia
      • Flinders Ranges
        • North Flinders Ranges
    		Min.Mag., 1980, 43:575-577.
    Austria
     
    • Styria
      • Weiz
        • Stubenberg am See
    		Bernhard, F. et al. (2008)
    Burma (Myanmar)
     
    • Mandalay Division
      • Sagaing District
        • Mogok
    		Pavel M. Kartashov analytical data, Sieghard Ellenberger specimens
    China
     
    • Hunan Province
      • Chenzhou Prefecture
        • Linwu Co.
          • Xianghualing Sn-polymetallic ore field
    		Huang et al. (1988): Hsianghualing rocks, mineral deposits and minerals. Beijing Sci. Techn. Publ. Bur. (Beijing), 255 pp.; AM 44 (1959), 1327; EJM 10 (1998), 1037
    Madagascar
     
    • Antananarivo Province
      • Vakinankaratra Region
        • Sahatany Pegmatite Field (Mt Ibity area)
          • Sahatany Valley
    		Ranorosoa, N. (1986): Etude mineralogique des pegmatites du champ de la Sahatany, Madagascar. These de Doctorat de l`Universite Paul Sabatier, Toulouse
    Russia
     
    • Northern Region
      • Karelia Republic
        • Ladoga Region
    		Schmetzer (1983): Crystal chemistry of natural Be-Mg-Al-oxides: taaffeite, taprobanite, musgravite. Neues Jahrbuch für Mineralogie, Abhandlungen: 146: 15-28.
    Sri Lanka
     
    • Sabaragamuwa Province
      • Ratnapura District
    		Natural History Museum Vienna collection
        • Ratnapura
    		Min.Mag.(1951) 29, 765-772; Neues Jahrb.Min.,Abh.(1983) 146, 15-28
    Sweden
     
    • Värmland
      • Filipstad
    		Kjell Gatedal; Nysten,P. & Gustafsson, L.(2006): I jakt på sällsynta mineral. Geologiskt forum nr 49, 22-25
    USA
     
    • Virginia
      • Rockbridge Co.
    		Minerals of Virginia 1990 by R. V. Dietrich
    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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