Lithiomarsturite
A valid IMA mineral species
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About Lithiomarsturite
Formula:
LiCaMn3Si5O14(OH)
formerly given as LiCa2Mn2Si5O14(OH)
Colour:
Light pinkish brown through intermediate hues to light yellow
Lustre:
Vitreous
Hardness:
6
Specific Gravity:
3.32
Crystal System:
Triclinic
Name:
Named for being the lithium analogue of marsturite. The root marsturite is for Marion Butler Stuart [December 21, 1921 - July 26, 2000 Hailey, Idaho, USA], of Bellevue, Idaho, USA, amateur mineral collector and benefactor of mineralogical projects.
Unique Identifiers
Mindat ID:
2417
Long-form identifier:
mindat:1:1:2417:0
GUID
(UUID V4):
(UUID V4):
2286cc6a-abb5-429a-a5dd-781d0d175ca6
IMA Classification of Lithiomarsturite
Approved
IMA Formula:
LiCaMn2+3Si5O14(OH)
First published:
1990
Approval history:
3.1: "Revised formula for lithiomarsturite (...)", January 2022
Classification of Lithiomarsturite
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
65.4.1.7
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
14.18.26
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 |
|---|---|---|
| Lmsr | 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 Lithiomarsturite
Vitreous
Transparency:
Transparent
Comment:
Vitreous on fresh cleavage surfaces
Colour:
Light pinkish brown through intermediate hues to light yellow
Streak:
Very light brown
Hardness:
6 on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
good On {100} and {001}
good On {100} and {001}
Density:
3.32 g/cm3 (Measured) 3.27 g/cm3 (Calculated)
Comment:
Measured with heavy liquids
Optical Data of Lithiomarsturite
Type:
Biaxial (-)
RI values:
nα = 1.645(1) nβ = 1.660(1) nγ = 1.666(1)
2V:
Measured: 59° (8), Calculated: 64°
Max Birefringence:
δ = 0.021
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:
Moderate
Dispersion:
relatively strong, r > v
Comments:
X ≈ b, Y ≈ [100], Z ≈ c.
Chemistry of Lithiomarsturite
Mindat Formula:
LiCaMn3Si5O14(OH)
formerly given as LiCa2Mn2Si5O14(OH)
formerly given as LiCa2Mn2Si5O14(OH)
Common Impurities:
Fe,Mg,H2O
Crystallography of Lithiomarsturite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.652(3) Å, b = 12.119(3) Å, c = 6.805(2) Å
α = 85.41(2)°, β = 94.42(3)°, γ = 111.51(2)°
α = 85.41(2)°, β = 94.42(3)°, γ = 111.51(2)°
Ratio:
a:b:c = 0.631 : 1 : 0.562
Unit Cell V:
584.45 ų (Calculated from Unit Cell)
Z:
2
Morphology:
{100} (dominant), {010}, and {001}.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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CIF File Best | x | y | z | a | b | c
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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) |
|---|---|---|---|---|---|---|---|
| 0018492 | Lithiomarsturite | Yang H, Downs R T, Yang Y W (2011) Lithiomarsturite, LiCa2Mn2Si5O14(OH) Acta Crystallographica E67 i73-i73 |  | 2011 | Foote mine, Kings Mountain, North Carolina, USA | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.01 Å | (100) |
| 3.19 Å | (90) |
| 2.913 Å | (90) |
| 2.744 Å | (60) |
| 3.08 Å | (50) |
| 2.217 Å | (50) |
| 6.79 Å | (20) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites |
Type Occurrence of Lithiomarsturite
General Appearance of Type Material:
1-3 mm euhedral crystals. Usually rhombic with sharp edges that tend to be markedly lighter in color than the rest of the crystal. Also slightly divergent crystal bundles with irregular terminations that looked as if they were etched and that are lighter.
Place of Conservation of Type Material:
National Museum of Natural History (Smithsonian Institution), Washington, D.C., U.S.A. under catalogue numbers NMNH 165268 (holotype) and NMNH 165460 (cotype).
Associated Minerals at Type Locality:
Reference:
Peacor, D.R., Dunn, P.J., White, J.S., Grice, J.D., Chi, P.H. (1990) Lithiomarsturite, a new member of the pyroxenoid group, from North Carolina. American Mineralogist: 75: 409-414.
Synonyms of Lithiomarsturite
Other Language Names for Lithiomarsturite
German:Lithiomarsturit
Spanish:Lithiomarsturita
Common Associates
Associated Minerals Based on Photo Data:
| 2 photos of Lithiomarsturite associated with Fluorapatite | Ca5(PO4)3F |
| 1 photo of Lithiomarsturite associated with Tetrawickmanite | Mn2+[Sn4+(OH)6] |
| 1 photo of Lithiomarsturite associated with Albite | Na(AlSi3O8) |
| 1 photo of Lithiomarsturite associated with Parsettensite | (K,Na,Ca)7.5(Mn,Mg)49Si72O168(OH)50 · nH2O |
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 | Manganbabingtonite | Ca2(Mn,Fe)FeSi5O14(OH) |
| 9.DK.05 | Marsturite | NaCaMn3Si5O14(OH) |
| 9.DK.05 | Nambulite | LiMn2+4Si5O14(OH) |
| 9.DK.05 | Natronambulite | (Na,Li)(Mn,Ca)4Si5O14OH |
| 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 |
Fluorescence of Lithiomarsturite
None observed
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 Lithiomarsturite
mindat.org URL:
https://www.mindat.org/min-2417.html
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References for Lithiomarsturite
Reference List:
Yang, Hexiong, Downs, Robert T., Yang, Yongbo W. (2011) Lithiomarsturite, LiCa2Mn2Si5O14(OH) Acta Crystallographica Section E Structure Reports Online, 67 (12) 73 doi:10.1107/s1600536811047581
Localities for Lithiomarsturite
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.
USA (TL) | |
| Peacor et al. (1990) |
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Foote Lithium Co. Mine, Kings Mountain, Cleveland County, North Carolina, USA