Namansilite (original) (raw)
A valid IMA mineral species
About NamansiliteHide
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Colour:
Dark brownish red, purplish red
Lustre:
Adamantine, Vitreous, Pearly
Crystal System:
Monoclinic
Name:
For the principal constituent elements: sodium (natrium), manganese, silicon.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:2834:5
a2566aeb-c668-47fb-b60b-4f28dea9eaba
IMA Classification of NamansiliteHide
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Type description reference:
Classification of NamansiliteHide
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9.DA.25
9 : SILICATES (Germanates)
D : Inosilicates
A : Inosilicates with 2-periodic single chains, Si2O6; pyroxene family
65.1.3c.3
65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
1 : Single-Width Unbranched Chains, W=1 with chains P=2
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Nms | 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 NamansiliteHide
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Adamantine, Vitreous, Pearly
Colour:
Dark brownish red, purplish red
Density:
3.51 g/cm3 (Measured) 3.61 g/cm3 (Calculated)
Optical Data of NamansiliteHide
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RI values:
_n_α = 1.734 - 1.750 _n_β = 1.769 - 1.850 _n_γ = 1.835 - 1.870
2V:
Measured: 15° to 85°, Calculated: 64°
δ = 0.101 - 0.120
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Optical Extinction:
Y = b; X ∧ c = 19°-25°.
Comments:
X = lemon-yellow to pale yellow-orange; Y = raspberry-red to brownish red; Z = blood-red to reddish purple.
Comments:
Absorption: Z > Y > X.
Chemistry of NamansiliteHide
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Mindat Formula:
NaMn3+Si2O6
Common Impurities:
Al,Ti,Fe,Mg,Ca,K,Sr,Ba
Chemical AnalysisHide
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Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | (Na0.99Ca0.01Mg0.01)(Mn3+0.97Mg0.03)[Si1.99O6] |
Crystallography of NamansiliteHide
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Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 9.506(6) Å, b = 8.612(2) Å, c = 5.354(2) Å
β = 105.06(6)°
Ratio:
a:b:c = 1.104 : 1 : 0.622
Unit Cell V:
423.25 ų (Calculated from Unit Cell)
Twinning:
On {100}, simple; polysynthetic.
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0010035 | Namansilite | Ohashi H, Osawa T, Tsukimura K (1987) Refinement of the structure of manganese sodium dimetasilicate Acta Crystallographica C43 605-607 |  |
1987 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.925 Å | (100) |
| 2.883 Å | (100) |
| 6.29 Å | (66) |
| 2.499 Å | (50) |
| 2.495 Å | (50) |
| 4.305 Å | (45) |
| 1.579 Å | (24) |
Geological EnvironmentHide
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Type Occurrence of NamansiliteHide
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General Appearance of Type Material:
Stout prismatic crystals, to 2 mm, forming irregular pods and aggregates.
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia.
Geological Setting of Type Material:
Low-grade metamorphosed and highly oxidized Mn, Na-rich sediments.
Associated Minerals at Type Locality:
Reference:
Kalinin, V.V., Marsii, I.M., Dikov, Y.P., Troneva, N.V., Trubkin, N.V. (1992) Namansilite NaMn3+Si2O6: a new silicate. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 121(1): 89-94.
Synonyms of NamansiliteHide
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Other Language Names for NamansiliteHide
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Relationship of Namansilite to other SpeciesHide
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Other Members of this group:
| Aegirine | NaFe3+Si2O6 | Mon. 2/m : _B_2/b |
|---|---|---|
| Aegirine-augite | (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6 | Mon. 2/m : _B_2/b |
| Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 | Mon. 2/m : _B_2/b |
| Burnettite | CaVAlSiO6 | Mon. 2/m : _B_2/b |
| Clinoenstatite | MgSiO3 | Mon. 2/m : _P_21/b |
| Clinoferrosilite | Fe2+2Si2O6 | Mon. 2/m : _P_21/b |
| Colomeraite | NaTi3+Si2O6 | Mon. 2/m : _B_2/b |
| Davisite | CaScAlSiO6 | Mon. 2/m : _B_2/b |
| Diopside | CaMgSi2O6 | Mon. 2/m : _B_2/b |
| Esseneite | CaFe3+[AlSiO6] | Mon. 2/m : _B_2/b |
| Grossmanite | CaTi3+ AlSiO6 | Mon. 2/m : _B_2/b |
| Hedenbergite | CaFe2+Si2O6 | Mon. 2/m : _B_2/b |
| Jadeite | Na(Al,Fe3+)Si2O6 | Mon. 2/m : _B_2/b |
| Jervisite | NaSc3+Si2O6 | Mon. 2/m : _B_2/b |
| Johannsenite | CaMn2+Si2O6 | Mon. 2/m : _B_2/b |
| Kanoite | Mn2+(Mg,Mn2+)Si2O6 | Mon. 2/m : _P_21/b |
| Kosmochlor | NaCrSi2O6 | Mon. 2/m : _B_2/b |
| Kushiroite | CaAl[AlSiO6] | Mon. 2/m : _B_2/b |
| Natalyite | NaV3+Si2O6 | Mon. 2/m : _B_2/b |
| Omphacite | (NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6 | Mon. 2/m |
| Petedunnite | Ca(Zn,Mn2+,Mg,Fe2+)Si2O6 | Mon. 2/m : _B_2/b |
| Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 | Mon. 2/m : _P_21/b |
| Ryabchikovite | CuMgSi2O6 | Mon. 2/m : _P_21/b |
| Spodumene | LiAlSi2O6 | Mon. 2/m : _B_2/b |
| Tissintite | (Ca,Na,◻)AlSi2O6 | Mon. 2/m : _B_2/b |
| UM2001-19-SiO:AlCaMgNa | (Na,Mg,Ca)(Mg,Al)Si2O6 | Mon. 2/m : _B_2/b |
| UM2003-36-SiO:CaNa | NaCrSi2O6 - CaMgSi2O6 | Mon. 2/m : _B_2/b |
Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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| 9.DA. | Protoenstatite | Mg2Si2O6 | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c n |
|---|---|---|---|
| 9.DA. | Ryabchikovite | CuMgSi2O6 | Mon. 2/m : _P_21/b |
| 9.DA. | Colomeraite | NaTi3+Si2O6 | Mon. 2/m : _B_2/b |
| 9.DA.05 | Donpeacorite | (Mn,Mg)MgSi2O6 | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 9.DA.05 | Enstatite | Mg2Si2O6 | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 9.DA.05 | Ferrosilite | Fe2+2Si2O6 | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 9.DA.10 | Clinoenstatite | MgSiO3 | Mon. 2/m : _P_21/b |
| 9.DA.10 | Clinoferrosilite | Fe2+2Si2O6 | Mon. 2/m : _P_21/b |
| 9.DA.10 | Kanoite | Mn2+(Mg,Mn2+)Si2O6 | Mon. 2/m : _P_21/b |
| 9.DA.10 | Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 | Mon. 2/m : _P_21/b |
| 9.DA.15 | Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 | Mon. 2/m : _B_2/b |
| 9.DA.15 | Diopside | CaMgSi2O6 | Mon. 2/m : _B_2/b |
| 9.DA.15 | Esseneite | CaFe3+[AlSiO6] | Mon. 2/m : _B_2/b |
| 9.DA.15 | Hedenbergite | CaFe2+Si2O6 | Mon. 2/m : _B_2/b |
| 9.DA.15 va | Jeffersonite | Ca(Mn,Zn,Fe)Si2O6 | |
| 9.DA.15 | Johannsenite | CaMn2+Si2O6 | Mon. 2/m : _B_2/b |
| 9.DA.15 | Petedunnite | Ca(Zn,Mn2+,Mg,Fe2+)Si2O6 | Mon. 2/m : _B_2/b |
| 9.DA.15 | Davisite | CaScAlSiO6 | Mon. 2/m : _B_2/b |
| 9.DA.15 | Kushiroite | CaAl[AlSiO6] | Mon. 2/m : _B_2/b |
| 9.DA.15 | Grossmanite | CaTi3+ AlSiO6 | Mon. 2/m : _B_2/b |
| 9.DA.20 | Aegirine-augite | (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6 | Mon. 2/m : _B_2/b |
| 9.DA.20 | Omphacite | (NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6 | Mon. 2/m |
| 9.DA.25 | Aegirine | NaFe3+Si2O6 | Mon. 2/m : _B_2/b |
| 9.DA.25 | Jadeite | Na(Al,Fe3+)Si2O6 | Mon. 2/m : _B_2/b |
| 9.DA.25 | Jervisite | NaSc3+Si2O6 | Mon. 2/m : _B_2/b |
| 9.DA.25 | Kosmochlor | NaCrSi2O6 | Mon. 2/m : _B_2/b |
| 9.DA.25 | Natalyite | NaV3+Si2O6 | Mon. 2/m : _B_2/b |
| 9.DA.25 | Tissintite | (Ca,Na,◻)AlSi2O6 | Mon. 2/m : _B_2/b |
| 9.DA.30 | Spodumene | LiAlSi2O6 | Mon. 2/m : _B_2/b |
| 9.DA.35 | Hiroseite | FeSiO3 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n m a |
Other InformationHide
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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 NamansiliteHide
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References for NamansiliteHide
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Localities for NamansiliteHide
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This 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.
Locality ListHide
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- 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.