Natronambulite
A valid IMA mineral species
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About Natronambulite
Formula:
(Na,Li)(Mn,Ca)4Si5O14OH
Colour:
Pinkish orange
Lustre:
Vitreous
Hardness:
5½ - 6
Specific Gravity:
3.51
Crystal System:
Triclinic
Name:
Named for its relation to nambulite, with dominant sodium, NATRium in Latin.
Unique Identifiers
Mindat ID:
2859
Long-form identifier:
mindat:1:1:2859:8
GUID
(UUID V4):
(UUID V4):
de8a8cc2-6f14-4c7c-a486-c47829544b50
IMA Classification of Natronambulite
Approved
IMA Formula:
NaMn2+4Si5O14(OH)
First published:
1985
Classification of Natronambulite
9.DK.05
9 : SILICATES (Germanates)
D : Inosilicates
K : Inosilicates with 5-periodic single chains
9 : SILICATES (Germanates)
D : Inosilicates
K : Inosilicates with 5-periodic single chains
65.4.1.5
65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
4 : Single-Width Unbranched Chains, W=1 with chains P=5
65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
4 : Single-Width Unbranched Chains, W=1 with chains P=5
14.18.2
14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe
14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe
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 |
---|---|---|
Nnbl | 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 Natronambulite
Vitreous
Colour:
Pinkish orange
Comment:
Very faintly yellowish color in thin section, distinguishing it from rhodonite, pyroxmangite and johannsenite, which are colorless.
Streak:
White with very faint orange tint
Hardness:
5½ - 6 on Mohs scale
Cleavage:
Perfect
[100] and [100] perfect
[100] and [100] perfect
Density:
3.51 g/cm3 (Measured) 3.50 g/cm3 (Calculated)
Optical Data of Natronambulite
Type:
Biaxial (+)
RI values:
nα = 1.706 nβ = 1.710 nγ = 1.730
2V:
Measured: 45° , Calculated: 50°
Max Birefringence:
δ = 0.024
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:
High
Dispersion:
r > v weak
Comments:
Absorption: Z > Y = X.
Chemistry of Natronambulite
Mindat Formula:
(Na,Li)(Mn,Ca)4Si5O14OH
Common Impurities:
Fe,Mg,Ca,H2O
Chemical Analysis
Oxide wt%:
1 | |
---|---|
SiO2 | 48.92 % |
MnO | 45.39 % |
MgO | 0.01 % |
CaO | 1.04 % |
SrO | 0.02 % |
Na2O | 4.10 % |
Li2O (by stoichiometry) | 0.37 % |
H2O (by stoichiometry) | 1.47 % |
Total: | 101.32 % |
Empirical formulas:
Sample ID | Empirical Formula |
---|---|
1 | (Na0.81Li0.15Ca0.04)(Mn2+0.93Ca0.07)Mn2+1.00Mn2+1.00Mn2+1.00[Si5.00O14](OH) |
Sample references:
ID | Locality | Reference | Notes |
---|---|---|---|
1 | Woods Mine, Darling Co., New South Wales, Australia | Frank K. Mazdab collectionsample FKM-30; https://www.rockptx.com/fkm-26-to-fkm-50/#FKM-30 | Presumed natronambulite associated with serandite, in a matrix of abundant quartz, braunite and mangano-mangani-ungarettiite. Li content is estimated from stoichiometry only (hence the unconfirmed nature of the ID, although the Li-dominant end-member nambulite is reported from the locality); H2O is also calculated from stoichiometry. |
Crystallography of Natronambulite
Crystal System:
Triclinic
Cell Parameters:
a = 7.62 Å, b = 11.76 Å, c = 6.73 Å
α = 92.81°, β = 94.55°, γ = 106.87°
α = 92.81°, β = 94.55°, γ = 106.87°
Ratio:
a:b:c = 0.648 : 1 : 0.572
Unit Cell V:
573.67 ų (Calculated from Unit Cell)
Comment:
Nagashima et al. (2014) give 7.6115(1), 11.7340(2), 6.7324(1) Å, 92.876(1), 94.846(1), 106.650(1)°, V = 572.28(2) Å3, for a sample from the Gozaisho mine.
Crystal Structure
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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) |
---|---|---|---|---|---|---|---|
0020224 | Natronambulite | Nagashima M, Armbruster T, Kolitsch U, Pettke T (2014) The relation between Li <-> Na substitution and hydrogen bonding in five-periodic single-chain silicates nambulite and marsturite: A single-crystal X-ray study American Mineralogist 99 1462-1470 | 2014 | Gozaisho mine, Iwaki, Japan | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.559 Å | (100) |
7.13 Å | (47) |
3.078 Å | (45) |
6.70 Å | (44) |
3.348 Å | (40) |
2.506 Å | (38) |
2.972 Å | (34) |
Comments:
Tanohata mine, Japan. Data from the type description.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
High-𝑇 alteration and/or metamorphism | |
32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits | |
Stage 4b: Highly evolved igneous rocks | >3.0 |
34 : Complex granite pegmatites |
Type Occurrence of Natronambulite
General Appearance of Type Material:
Bands of grains to 7 mm in size.
Place of Conservation of Type Material:
Department of Geology, National Science Museum, Tokyo, Japan.
Geological Setting of Type Material:
Contact metamorphosed bedded manganese ore deposits.
Associated Minerals at Type Locality:
Reference:
Matsubara, S., Kato, A., Tiba, T. (1985) Natronambulite, (Na,Li)(Mn,Ca)4Si5O14OH, a new mineral from the Tanohata mine, Iwate Prefecture, Japan. Mineralogical Journal: 12: 332-340.
Synonyms of Natronambulite
Other Language Names for Natronambulite
Relationship of Natronambulite to other Species
Forms a series with:
Related Minerals - Strunz-mindat Grouping
9.DK. | Ferrorhodonite | CaMn3Fe[Si5O15] |
9.DK. | Vittinkiite | MnMn3Mn[Si5O15] |
9.DK. | Ferri-hellandite-(Ce) | (Ca3Ce)Ce2Fe3+◻2B4Si4O22(OH)2 |
9.DK. | Shijiangshanite | Pb3CaAl(Si5O14)(OH)3 · 3H2O |
9.DK.05 | Allagite | |
9.DK.05 | Babingtonite | Ca2(Fe,Mn)FeSi5O14(OH) |
9.DK.05 | Lithiomarsturite | LiCaMn3Si5O14(OH) |
9.DK.05 | Manganbabingtonite | Ca2(Mn,Fe)FeSi5O14(OH) |
9.DK.05 | Marsturite | NaCaMn3Si5O14(OH) |
9.DK.05 | Nambulite | LiMn2+4Si5O14(OH) |
9.DK.05 | Rhodonite | CaMn3Mn[Si5O15] |
9.DK.05 | Scandiobabingtonite | Ca2(Fe2+,Mn)ScSi5O14(OH) |
9.DK.10 | Santaclaraite | CaMn4[Si5O14OH](OH) · H2O |
9.DK.15 | Saneroite | NaMn2+5[Si5O14(OH)](VO3)(OH) |
9.DK.20 | Hellandite-(Y) | (Ca,REE)4Y2Al◻2(B4Si4O22) (OH)2 |
9.DK.20 | Tadzhikite-(Ce) | Ca4Ce3+2Ti◻2(B4Si4O22)(OH)2 |
9.DK.20 | Hellandite-(Yb) | (Ca,Y)4(Yb,Y)2(Al,Fe3+,Ti4+)(Be,Li)2[B4Si4O22](O,F,OH)2 |
9.DK.20 | Mottanaite-(Ce) | Ca4(Ce,REE)Σ2Al(Be1.5◻0.5)Σ2[B4Si4O22]O2 |
9.DK.20 | Ciprianiite | Ca4[(Th,U),Ca]Σ2Al(Be0.5◻1.5)Σ2[B4Si4O22](OH)2 |
9.DK.20 | Hellandite-(Ce) | (Ca,REE)4Ce2Al◻2(B4Si4O22) (OH)2 |
9.DK.20 | Ferri-mottanaite-(Ce) | Ca4Ce2Fe3+(Be1.5◻0.5)[Si4B4O22]O2 |
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 Natronambulite
mindat.org URL:
https://www.mindat.org/min-2859.html
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References for Natronambulite
Localities for Natronambulite
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).
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.
All localities listed without proper references should be considered as questionable.
Australia | |
| Frank K. Mazdab collection |
Japan | |
| Nagashima et al. (2014) |
| Matsubara et al. (1985) +1 other reference |
Nagase et al. (2012) | |
| Minakawa et al. (2008) |
| Matsubara et al. (2007) |
Namibia | |
| Von Knorring et al. (1978) |
Romania | |
Hîrtopanu et al. (2003) +1 other reference | |
| minerals-of-the-carpathians.eu (2008) |
| Hîrtopanu (1997) +1 other reference |
Spain | |
| Joan Abella i Creus (2008) |
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Tanohata mine, Tanohata, Shimohei District, Iwate Prefecture, Japan