Tapiolite-(Mn)
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Formula:
(Mn,Fe)(Ta,Nb)2O6
System:
Tetragonal
Colour:
Dark brown
Lustre:
Sub-Adamantine, Metallic, Sub-Metallic
Hardness:
6 - 6½
Member of:
Name:
Named manganotapiolite in 1983 for its compositional relationship to ferrotapiolite.
Isostructural with:
Classification of Tapiolite-(Mn)
Approved
4/D.04-20
4.DB.10
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
B : With medium-sized cations; chains of edge-sharing octahedra
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
B : With medium-sized cations; chains of edge-sharing octahedra
8.3.1.2
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
3 : AB2O6
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
3 : AB2O6
18.1.38
18 : Niobates and Tantalates
1 : Niobates and tantalates containing neither rare earths nor U
18 : Niobates and Tantalates
1 : Niobates and tantalates containing neither rare earths nor U
Physical Properties of Tapiolite-(Mn)
Sub-Adamantine, Metallic, Sub-Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Dark brown
Streak:
Dark brown
Hardness (Mohs):
6 - 6½
Hardness (Vickers):
VHN100=711 kg/mm2
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven, Splintery
Density:
7.72 g/cm3 (Calculated)
Optical Data of Tapiolite-(Mn)
Type:
Uniaxial
Type:
Anisotropic
Anisotropism:
Weak
Optical Extinction:
Parallel
Colour in reflected light:
Gray
Internal Reflections:
strong red-brown
Chemical Properties of Tapiolite-(Mn)
Formula:
(Mn,Fe)(Ta,Nb)2O6
IMA Formula:
Mn2+Ta2O6
Elements listed in formula:
Analytical Data:
Compositions with Mn>Fe = 59:32 not yet reported.
Crystallography of Tapiolite-(Mn)
Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
P42/mnm
Cell Parameters:
a = 4.762 Å, c = 9.272 Å
Ratio:
a:c = 1 : 1.947
Unit Cell Volume:
V 210.26 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Nearly equant to short prismatic.
Twinning:
Twinning is not mentioned in the original description, but may be present.
X-Ray Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.24 | (40) |
| 3.37 | (100) |
| 2.59 | (90) |
| 2.38 | (60) |
| 1.75 | (90) |
| 1.68 | (60) |
| 1.50 | (40) |
| 1.41 | (40) |
Comments:
ICDD 35-626
Occurrences of Tapiolite-(Mn)
Type Occurrence of Tapiolite-(Mn)
Geological Setting of Type Material:
Granite pegmatite.
Associated Minerals at Type Locality:
Relationship of Tapiolite-(Mn) to other Species
Series:
Forms a series with Tapiolite-(Fe) (see here)
Member of:
Other Members of Group:
| Tapiolite-(Fe) | (Fe,Mn)(Ta,Nb)2O6 |
| 4.DB.05 | Argutite | GeO2 |
| 4.DB.05 | Cassiterite | SnO2 |
| 4.DB.05 | Plattnerite | PbO2 |
| 4.DB.05 | Pyrolusite | MnO2 |
| 4.DB.05 | Rutile | TiO2 |
| 4.DB.05 | Tripuhyite | Fe3+Sb5+O4 |
| 4.DB.05 | Tugarinovite | MoO2 |
| 4.DB.05 | Varlamoffite | (Sn,Fe)(O,OH)2 |
| 4.DB.10 | Byströmite | MgSb2O6 |
| 4.DB.10 | Tapiolite-(Fe) | (Fe,Mn)(Ta,Nb)2O6 |
| 4.DB.10 | Ordoñezite | ZnSb2O6 |
| 4.DB.15b | Akhtenskite | ε-Mn4+O2 |
| 4.DB.15c | Nsutite | (Mn4+,Mn2+)(O,OH)2 |
| 4.DB.15a | Paramontroseite | V4+O2 |
| 4.DB.15a | Ramsdellite | Mn4+O2 |
| 4.DB.20 | Scrutinyite | α-PbO2 |
| 4.DB.25 | Ishikawaite | U4+Fe2+Nb2O8 |
| 4.DB.25 | Ixiolite | (Ta,Nb,Sn,Fe,Mn)4O8 |
| 4.DB.25 | Samarskite-(Y) | (Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8 |
| 4.DB.25 | Srilankite | ZrTi2O6 |
| 4.DB.25 | Yttrocolumbite-(Y) | Y(U4+,Fe2+)Nb2O8 |
| 4.DB.25 | Calciosamarskite | (Ca,Fe3+,Y)2(Nb,Ta,Ti)2O8 |
| 4.DB.25 | Samarskite-(Yb) | (Yb,Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8 |
| 4.DB.30 | Ferberite | FeWO4 |
| 4.DB.30 | Hübnerite | MnWO4 |
| 4.DB.30 | Sanmartinite | (Zn,Fe)WO4 |
| 4.DB.30 | Krasnoselskite | CoWO4 |
| 4.DB.30 | Heftetjernite | ScTaO4 |
| 4.DB.30 | Huanzalaite | MgWO4 |
| 4.DB.35 | Columbite-(Fe) | FeNb2O6 |
| 4.DB.35 | Tantalite-(Fe) | FeTa2O6 |
| 4.DB.35 | Columbite-(Mn) | (Mn,Fe)(Nb,Ta)2O6 |
| 4.DB.35 | Tantalite-(Mn) | MnTa2O6 |
| 4.DB.35 | Columbite-(Mg) | (Mg,Fe,Mn)(Nb,Ta)2O6 |
| 4.DB.35 | Qitianlingite | (Fe,Mn)2(Nb,Ta)2WO10 |
| 4.DB.35 | Magnocolumbite | (Mg,Fe,Mn)(Nb,Ta)2O6 |
| 4.DB.35 | Tantalite-(Mg) | (Mg,Fe2+)(Ta,Nb)2O6 |
| 4.DB.40 | Ferrowodginite | Fe2+Sn4+Ta2O8 |
| 4.DB.40 | Lithiotantite | LiTa3O8 |
| 4.DB.40 | Lithiowodginite | LiTa3O8 |
| 4.DB.40 | Titanowodginite | Mn2+TiTa2O8 |
| 4.DB.40 | Wodginite | Mn2+Sn4+Ta2O8 |
| 4.DB.40 | Ferrotitanowodginite | Fe2+TiTa2O8 |
| 4.DB.40 | Wolframowodginite | Mn(Mn,Sn,Fe,Ta)(W,Ta,Nb)2O8 |
| 4.DB.45 | Tivanite | V3+TiO3(OH) |
| 4.DB.50 | Carmichaelite | (Ti,Cr,Fe)[O2-x(OH)x] |
| 4.DB.55 | Alumotantite | AlTaO4 |
| 4.DB.60 | Biehlite | ((Sb,As)O)2[MoO4] |
| 18.1.1 | Lithiotantite | LiTa3O8 |
| 18.1.2 | Lueshite | NaNbO3 |
| 18.1.3 | Natroniobite | NaNbO3 |
| 18.1.4 | Franconite | Na(Nb2O5)(OH) · 3H2O |
| 18.1.5 | Natrotantite | Na2Ta4O11 |
| 18.1.6 | Irtyshite | Na2(Ta,Nb)4O11 |
| 18.1.7 | Rankamaite | (Na,K)3(Ta,Nb,Al)11(O,OH)31 |
| 18.1.8 | Hydropyrochlore | (H2O,□)2Nb2(O,OH)6(H2O) |
| 18.1.9 | Calciotantite | CaTa4O11 |
| 18.1.10 | Rynersonite | CaTa2O6 |
| 18.1.11 | Microlite Group | |
| 18.1.12 | Belyankinite | Ca1-2(Ti,Nb)5O12 · 9H2O (?) |
| 18.1.13 | Latrappite | Ca2NbFe3+O6 |
| 18.1.14 | Hochelagaite | (Ca,Na,Sr)(Nb,Ti,Si,Al)4O11 · 8H2O |
| 18.1.15 | Bariomicrolite (of Hogarth 1977) | |
| 18.1.16 | Parabariomicrolite | BaTa4O10(OH)2 · 2H2O |
| 18.1.17 | Bariopyrochlore (of Hogarth 1977) | A2Nb2(O,OH)6Z |
| 18.1.18 | Alumotantite | AlTaO4 |
| 18.1.19 | Simpsonite | Al4(Ta,Nb)3O13(OH,F) |
| 18.1.20 | Sosedkoite | (K,Na)5Al2(Ta,Nb)22O60 |
| 18.1.21 | Thoreaulite | (Sn2+,Pb)(Ta,Nb)2O6 |
| 18.1.22 | Stannomicrolite (of Hogarth 1977) | |
| 18.1.23 | Foordite | Sn2+(Nb,Ta)2O6 |
| 18.1.24 | Changbaiite | PbNb2O6 |
| 18.1.25 | Plumbopyrochlore (of Skorobogatova et al.) | A2Nb2(O,OH)6Z |
| 18.1.26 | Plumbomicrolite (of Hogarth 1977) | |
| 18.1.27 | Stibiocolumbite | Sb(Nb,Ta)O4 |
| 18.1.28 | Stibiotantalite | Sb(Ta,Nb)O4 |
| 18.1.29 | Natrobistantite | |
| 18.1.30 | Cesplumtantite | (Cs,Na)2(Pb,Sb3+)3Ta8O24 |
| 18.1.31 | Stibiomicrolite (of Groat et al.) | |
| 18.1.32 | Cesstibtantite | |
| 18.1.34 | Bismutotantalite | Bi(Ta,Nb)O4 |
| 18.1.35 | Bismutomicrolite (of Hogarth 1977) | |
| 18.1.36 | Tantalite-(Mn) | MnTa2O6 |
| 18.1.37 | Gerasimovskite | (Mn,Ca)(Nb,Ti)5O12 · 9H2O |
| 18.1.39 | Columbite-(Mn) | (Mn,Fe)(Nb,Ta)2O6 |
| 18.1.40 | Wodginite | Mn2+Sn4+Ta2O8 |
| 18.1.41 | Ixiolite | (Ta,Nb,Sn,Fe,Mn)4O8 |
| 18.1.42 | Columbite-(Fe) | FeNb2O6 |
| 18.1.43 | Tantalite-(Fe) | FeTa2O6 |
| 18.1.44 | Columbite | |
| 18.1.45 | Tantalite | (Mn,Fe)(Ta,Nb)2O6 |
| 18.1.46 | Tapiolite | (Fe,Mn)(Ta,Nb)2O6 |
| 18.1.47 | Tapiolite-(Fe) | (Fe,Mn)(Ta,Nb)2O6 |
| 18.1.48 | Columbite-(Mg) | (Mg,Fe,Mn)(Nb,Ta)2O6 |
| 18.1.50 | Strüverite | (Ti,Ta,Fe)O2 |
| 18.1.51 | Staringite | (Fe,Mn)x(Ta,Nb)2xSn6-3xO12 |
Other Names for Tapiolite-(Mn)
Name in Other Languages:
Other Information
Not fluorescent.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Industrial Uses:
Known in only a very few specimens. Compositionally zoned.
References for Tapiolite-(Mn)
Reference List:
- Lahti, S.I., Johanson, B. & Virkkunen, M. (1983): Contribution to the chemistry of tapiolite – manganotapiolite, a new mineral. Bulletin of the Geological Society of Finland. 55, 101-109.
American Mineralogist (1985): 70: 217.
Mineralogical Record 39:132
Canadian Mineralogist (1996): 34: 631-647.
American Mineralogist (1985): 70: 217.
Mineralogical Record 39:132
Canadian Mineralogist (1996): 34: 631-647.
Internet Links for Tapiolite-(Mn)
mindat.org URL:
https://www.mindat.org/min-2523.html
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External Links:
Mineral Dealers:
Localities for Tapiolite-(Mn)
This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
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(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Finland (TL) | |
| Lahti, S.I., Johanson, B. & Virkkunen, M. (1983): Contribution to the chemistry of tapiolite – manganotapiolite, a new mineral. Bulletin of the Geological Society of Finland. 55, 101-109. |
| http://www.mindat.org/mesg-7-238731.html | |
USA | |
| King, V. and Foord, E., 1994, Mineralogy of Maine, volume 1.; W. B. Thompson, D. L. Joyner, R. G. Woodman, and V. T. King (2005) A Collector's Guide to Maine Mineral Localities. Maine Geological Survey Bulletin 41 |
Tiainen pegmatite, Eräjärvi area, Orivesi, Western and Inner Finland Region, Finland