Tusionite
A valid IMA mineral species
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About Tusionite
Formula:
Mn2+Sn4+[BO3]2
Colour:
Colourless, yellow-brown, honey yellow
Lustre:
Vitreous
Hardness:
5 - 6
Specific Gravity:
4.73
Crystal System:
Trigonal
Name:
Named after its discovery locality, Tusion River valley, Pamir Mountains, Tajikistan.
Type Locality:
This page provides mineralogical data about Tusionite.
Unique Identifiers
Mindat ID:
4062
Long-form identifier:
mindat:1:1:4062:0
GUID
(UUID V4):
(UUID V4):
ea1c406e-d54c-487c-9aab-ac8b23dac289
IMA Classification of Tusionite
Classification of Tusionite
6.AA.15
6 : BORATES
A : Monoborates
A : BO3, without additional anions; 1(D).
6 : BORATES
A : Monoborates
A : BO3, without additional anions; 1(D).
24.3.3.2
24 : ANHYDROUS BORATES
3 : AmBn[XO3]p
24 : ANHYDROUS BORATES
3 : AmBn[XO3]p
9.7.10
9 : Borates
7 : Borates of Mn
9 : Borates
7 : Borates of Mn
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Tsn | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Tusionite
Vitreous
Transparency:
Translucent
Colour:
Colourless, yellow-brown, honey yellow
Hardness:
5 - 6 on Mohs scale
Hardness:
VHN40=400 - 750 kg/mm2 - Vickers
Comment:
VH 400-500 on (001); 700-750 perpendicular to (001)
Cleavage:
Perfect
(001)
(001)
Density:
4.73 g/cm3 (Measured) 4.85 g/cm3 (Calculated)
Optical Data of Tusionite
Type:
Uniaxial (-)
RI values:
nω = 1.854(2) nε = 1.752(2)
Max Birefringence:
δ = 0.102
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:
Very High
Colour in reflected light:
grayish white
Chemistry of Tusionite
Mindat Formula:
Mn2+Sn4+[BO3]2
Elements listed:
Crystallography of Tusionite
Crystal System:
Trigonal
Class (H-M):
3 - Rhombohedral
Space Group:
R3
Cell Parameters:
a = 4.781(1) Å, c = 15.381(7) Å
Ratio:
a:c = 1 : 3.217
Unit Cell V:
304.48 ų (Calculated from Unit Cell)
Z:
3
Morphology:
Thin platy crystals, to 1.5 cm, in rosettelike aggregates.
Crystal Structure
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2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0005417 | Tusionite | Cooper M A, Hawthorne F C, Novak M (1994) The crystal structure of tusionite, MnSn(BO3)2, a dolomite-structure borate The Canadian Mineralogist 32 903-907 |  | 1994 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.12 Å | (4) |
| 4.02 Å | (4) |
| 3.65 Å | (9) |
| 2.818 Å | (10) |
| 2.393 Å | (6) |
| 1.999 Å | (6) |
| 1.744 Å | (8) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites |
Geological Setting:
Boron-rich complex pegmatites of the elbaite subtype.
Type Occurrence of Tusionite
General Appearance of Type Material:
Lamellar intergrowths up to 1.5 cm with tetrawickmanite and as small tabular crystals.
Place of Conservation of Type Material:
Mineralogical Museum, St. Petersburg University, St. Petersburg, Russia, 17096.
Mining Institute, St. Petersburg, Russia, 1661/1.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 82546.
Mining Institute, St. Petersburg, Russia, 1661/1.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 82546.
Geological Setting of Type Material:
Miarolitic granite pegmatite.
Associated Minerals at Type Locality:
Synonyms of Tusionite
Other Language Names for Tusionite
Varieties of Tusionite
Common Associates
Associated Minerals Based on Photo Data:
| 12 photos of Tusionite associated with Phenakite | Be2SiO4 |
| 3 photos of Tusionite associated with Petalite | LiAl(Si4O10) |
| 2 photos of Tusionite associated with Albite | Na(AlSi3O8) |
| 1 photo of Tusionite associated with Jeremejevite | Al6(BO3)5(F,OH)3 |
| 1 photo of Tusionite associated with Columbite-(Mn) | Mn2+Nb2O6 |
| 1 photo of Tusionite associated with Smoky Quartz | SiO2 |
| 1 photo of Tusionite associated with Quartz | SiO2 |
Related Minerals - Strunz-mindat Grouping
| 6.AA.05 | Sassolite | H3BO3 |
| 6.AA.15 | Nordenskiöldine | CaSn4+[BO3]2 |
| 6.AA.35 | Jimboite | (Mn2+,Mg)3[BO3]2 |
| 6.AA.35 | Kotoite | Mg3[BO3]2 |
| 6.AA.40 | Takedaite | Ca3[BO3]2 |
Fluorescence of Tusionite
Not fluorescent
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 Tusionite
mindat.org URL:
https://www.mindat.org/min-4062.html
Please feel free to link to this page.
Please feel free to link to this page.
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Mineral Dealers:
References for Tusionite
Reference List:
Konovalenko, S. I., Voloshin, A. V., Pakhomovskiy, Ya. A., Anen'yev, S. S., Perlina, G. A., Rogachev, D. L., Kuznetsov, V. Ya. (1984) Tusionite, MnSn(BO3)2, a new Borate from Granite Pegmatite of Southwestern Pamir. International Geology Review, 26 (4) 481-485 doi:10.1080/00206818409466576
Localities for Tusionite
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.
Czech Republic | |
| Novák +4 other references |
| Flégr et al. (2017) | |
Myanmar | |
| Mineralogical Magazine +2 other references |
Tajikistan | |
| Mirakov M.A. et al. (2018) |
| Konovalenko et al. (1984) +1 other reference |
Vietnam | |
| Kubernátová et al. (2019) |
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Phenakite Mine, Khetchel village, Molo quarter, Momeik Township, Kyaukme District, Shan State, Myanmar