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Magnesiotaaffeite-2N’2S

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Långban, Filipstad, Värmland, Sweden
© Kjell Gatedal

Show Magnesiotaaffeite-2N’2S Photos (5)
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.
This page provides mineralogical data about Magnesiotaaffeite-2N’2S.

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, Sabaragamuwa Province, Sri Lanka
Year of Discovery:1951

Physical Properties of Magnesiotaaffeite-2N’2S

Lustre:Vitreous
Hardness (Mohs):8 - 8½

Crystallography of Magnesiotaaffeite-2N’2S

Crystal System:Hexagonal
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)

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

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,Fe,Zn)
 
2
Al
 
6
BeO
 
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,Fe,Zn)
 
2
Al
 
6
BeO
 
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
(Mn,Mg,Ca,Ba,K,Na)
 
2
Mn
 
3
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.

Articles/Blogs about Magnesiotaaffeite-2N’2S

Internet Links for Magnesiotaaffeite-2N’2S

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    Localities for Magnesiotaaffeite-2N’2S

    Hide Locality List
    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.
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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.
    Australia
     
    • South Australia
      • Flinders Ranges
        • North Flinders Ranges
    		Min.Mag., 1980, 43:575-577.
    Burma (Myanmar)
     
    • Mandalay Division
      • Sagaing District
        • Mogok
    		No reference listed
    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 (Betafo - Antsirabé region)
        • Sahatany Pegmatite Field (Mt Bity (Ibity) area)
          • Sahatany Valley
    		Ranorosoa, N (1986) : Etude mineralogique des pegmatites du champ de la Sahatany, Madagscar. These de doctorat, 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
    		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
    Google
     
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