Lithiomarsturite Mineral Data

General Lithiomarsturite Information

Chemical Formula:

LiCa2Mn2HSi5O15

Composition:

Molecular Weight = 578.40 gm

Lithium 1.20 % Li 2.58 % Li₂O

Calcium 13.86 % Ca 19.39 % CaO

Manganese 19.00 % Mn 24.53 % MnO

Silicon 24.28 % Si 51.94 % SiO₂

Hydrogen 0.17 % H 1.56 % H₂O

Oxygen 41.49 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

LiCa₂Mn²⁺₂HSi₅O₁₅

Environment:

In small vugs within a complex Li-Sn-rich pegmatite

IMA Status:

Approved IMA 1990

Locality:

Foote Quarry, Kings Mountain, Cleveland County, North Carolina, USA. Link to MinDat.org Location Data.

Name Origin:

Named as the lithium analogue of marsturite

Name Pronunciation:

Lithiomarsturite + Pronunciation

Synonym:

IMA1988-035

Lithiomarsturite Image

Images:

Lithiomarsturite Lithiophosphate

Comments: Tan-brown lithiomarsturite with cream-colored lithiophosphate in matrix.
Location: Foote Mine, Kings Mtn, North Carolina, USA. Scale: 2" x 3".
© Chris Wright / Wrights Rock Shop

Lithiomarsturite Crystallography

Axial Ratios:

a:b:c =0.6314:1:0.5615

Cell Dimensions:

a = 7.652, b = 12.119, c = 6.805, Z = 2; alpha = 85.41°, beta = 94.42°, gamma = 111.51° V = 583.48 Den(Calc)= 3.29

Crystal System:

Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.01(1), 2.913(0.9), 3.19(0.9),

Physical Properties of Lithiomarsturite

Cleavage:

{001} Good, {100} Good

Color:

Yellow brown, Light yellow, Pink brown.

Density:

3.32

Diaphaneity:

Transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Habit:

Rhombohedral Crystals - Occurs as well-formed crystals showing rhobohedral crystals.

Hardness:

6 - Orthoclase

Luster:

Vitreous (Glassy)

Streak:

light brown

Optical Properties of Lithiomarsturite

Gladstone-Dale:

CI meas= 0.059 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.05 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1997,KPDmeas= 0.1979,KC= 0.2103
Ncalc = 1.69 - 1.7

Optical Data:

Biaxial (-), a=1.645, b=1.66, g=1.666, bire=0.0210, 2V(Calc)=64, 2V(Meas)=59.9-64.

Calculated Properties of Lithiomarsturite

Electron Density:

Bulk Density (Electron Density)=3.23 gm/cc
note: Specific Gravity of Lithiomarsturite =3.29 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Lithiomarsturite}= 7.46 barns/electron
U=PE_{Lithiomarsturite} x rElectron Density= 24.09 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lithiomarsturite is Not Radioactive

Lithiomarsturite Classification

Dana Class:

65.04.01.07 (65)Inosilicate Single-Width Unbranched Chains, W=1

(65.04)with chains P=5

(65.04.01)Rhodonite group

65.04.01.01 Rhodonite (Mn,Fe,Mg,Ca)SiO3 P1 1

65.04.01.02 Babingtonite Ca2(Fe,Mn)FeSi5O14(OH) P1 1

65.04.01.03 Manganbabingtonite Ca2(Mn,Fe)FeSi5O14(OH) P1 1

65.04.01.04 Nambulite (Li,Na)Mn4[Si5O14(OH)] P1 1

65.04.01.05 Natronambulite (Na,Li)Mn4[Si5O14(OH)] P1 1

65.04.01.06 Marsturite NaCaMn3[Si5O14(OH)] P1,P 1 Tri

65.04.01.07 Lithiomarsturite LiCa2Mn2HSi5O15 P1 1

65.04.01.08 Scandiobabingtonite! Ca2(Fe,Mn)ScSi5O14(OH) P1 1

Strunz Class:

09.DK.05 09 - SILICATES (Germanates)

09.D - Inosilicates* Structural terminology according to Liebau (1985)

09.DK -Inosilicates with 5-periodic single chains

09.DK.05 Babingtonite Ca2(Fe,Mn)FeSi5O14(OH) P1 1

09.DK.05 Marsturite NaCaMn3[Si5O14(OH)] P1,P 1 Tri

09.DK.05 Natronambulite (Na,Li)Mn4[Si5O14(OH)] P1 1

09.DK.05 Lithiomarsturite LiCa2Mn2HSi5O15 P1 1

09.DK.05 Manganbabingtonite Ca2(Mn,Fe)FeSi5O14(OH) P1 1

09.DK.05 Nambulite (Li,Na)Mn4[Si5O14(OH)] P1 1

09.DK.05 Rhodonite (Mn,Fe,Mg,Ca)SiO3 P1 1

09.DK.05 Scandiobabingtonite! Ca2(Fe,Mn)ScSi5O14(OH) P1 1

Other Lithiomarsturite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.75,p409-414,1990) OPTIC PROP.(Am.Min.,Vol.75,p409-414,1990)

See Also:

Links to other databases for Lithiomarsturite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Lithiomarsturite

LiCa2Mn2HSi5O15
Dana No: 65.04.01.07 Strunz No: 09.DK.05
Locality:

Notes:

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