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Tusionite

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Formula:
Mn
2+
 
Sn
4+
 
[BO
 
3
]
 
2
System:TrigonalColour:Colourless, Yellow-brown
Hardness:5 - 6
Name:Named after its discovery locality, Tusion River valley, Pamir Mountains, Tajikistan.
This page provides mineralogical data about Tusionite.

Classification of Tusionite

IMA status:Approved 1982
Strunz 8th edition ID:5/G.02-20
Nickel-Strunz 10th (pending) edition ID:6.AA.15

6 : BORATES
A : Monoborates
A : BO3, without additional anions; 1(D).
Dana 8th edition ID:24.3.3.2

24 : ANHYDROUS BORATES
3 : AmBn[XO3]p
Hey's CIM Ref.:9.7.10

9 : Borates
7 : Borates of Mn
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Type Occurrence of Tusionite

Type Locality:Tusion River Valley, Pamir Mts, Viloyati Mukhtori Gorno-Badakhshan (Viloyati Badakhshoni Kuni), Tajikistan
Year of Discovery:1982

Physical Properties of Tusionite

Lustre:Vitreous
Diaphaneity (Transparency):Translucent
Colour:Colourless, Yellow-brown
Hardness (Mohs):5 - 6

Crystallography of Tusionite

Crystal System:Trigonal
Cell Parameters:a = 4.78Å, c = 15.38Å
Ratio:a:c = 1 : 3.218
Unit Cell Volume:V 304.33 ų (Calculated from Unit Cell)

Optical Data of Tusionite

Type:Uniaxial (-)
RI values: nω = 1.854 nε = 1.752
Maximum Birefringence:δ = 0.102

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

Chemical Properties of Tusionite

Formula:
Mn
2+
 
Sn
4+
 
[BO
 
3
]
 
2
Simplified for copy/paste:Mn2+Sn4+[BO3]2
Essential elements:B, Mn, O, Sn
All elements listed in formula:B, Mn, O, Sn

Relationship of Tusionite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
6.AA.05Sassolite
H
 
3
BO
 
3
6.AA.15Nordenskiöldine
CaSn
4+
 
[BO
 
3
]
 
2
6.AA.35Jimboite
(Mn
2+
 
,Mg)
 
3
[BO
 
3
]
 
2
6.AA.35Kotoite
Mg
 
3
[BO
 
3
]
 
2
6.AA.40Takedaite
Ca
 
3
[BO
 
3
]
 
2
Related Minerals - Hey's Index Grouping:

- +
9.7.1Pinakiolite
(Mg,Mn
2+
 
)
 
2
Mn
3+
 
(BO
 
3
)O
 
2
9.7.2Orthopinakiolite
(Mg,Mn
2+
 
)
 
2
Mn
3+
 
(BO
 
3
)O
 
2
9.7.3Jimboite
(Mn
2+
 
,Mg)
 
3
[BO
 
3
]
 
2
9.7.4Sussexite
Mn
2+
 
BO
 
2
(OH)
9.7.5Wiserite
(Mn,Mg)
 
14
[Cl|(OH)
 
8
|(Si,Mg)(O,OH)
 
4
|(B
 
2
O
 
5
)
 
4
]
9.7.6Kurchatovite
Ca(Mg,Mn
2+
 
)[B
 
2
O
 
5
]
9.7.7Clinokurchatovite
Ca(Mg,Fe
2+
 
,Mn
2+
 
)[B
 
2
O
 
5
]
9.7.8Takéuchiite
(Mg,Mn
2+
 
)
 
2
(Mn
3+
 
,Fe
3+
 
)(BO
 
3
)O
 
2
9.7.9Blatterite
(Mn
2+
 
,Mg)
 
2
(Mn
3+
 
,Sb
3+
 
,Fe
3+
 
)(BO
 
3
)O
 
2

Other Names for Tusionite

Synonyms:
IMA1982-090
Other Languages:
German:Tusionit
Russian:Тусионит
Spanish:Tusionita

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 Tusionite

Reference List:

- +
Doklady Akademii Nauk SSSR (1983): 272: 1449-1453.

American Mineralogist (1984): 69: 1193.

Canadian Mineralogist (1994): 32: 903-908.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for Tusionite

Search Engines:
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  • External Links:
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  • Look for Tusionite on Athena Mineralogy
  • Look for Tusionite on Wikipedia
  • Look for Tusionite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Tusionite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
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  • Localities for Tusionite

    (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.
    Czech Republic
     
    • Moravia (Mähren; Maehren)
      • Vysočina Region
    Novák, M.: Bór obsahující minerály z granitických pegmatitů moldanubika. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 1995, roč. 3, s. 164-169.
    Tajikistan
     
    • Viloyati Mukhtori Gorno-Badakhshan (Viloyati Badakhshoni Kuni)
      • Pamir Mts
    Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
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