Sturtite Mineral Data

General Sturtite Information

Chemical Formula:

(Fe3+)(Mn2+,Ca,Mg)Si4O10(OH)3•10(H2O)

Composition:

Molecular Weight = 606.77 gm

Calcium 1.98 % Ca 2.77 % CaO

Magnesium 0.40 % Mg 0.66 % MgO

Manganese 5.43 % Mn 7.01 % MnO

Iron 9.20 % Fe 13.16 % Fe₂O₃

Silicon 18.51 % Si 39.61 % SiO₂

Hydrogen 3.82 % H 34.14 % H₂O

Oxygen 60.65 % O

______ ______

100.00 % 97.36 % = TOTAL OXIDE

Empirical Formula:

Fe³⁺Mn²⁺_0.6Ca_0.3Mg_0.1Si₄O₁₀(OH)₃•10(H₂O)

Environment:

An inadequately characterized mineral. Sturtite is now considered hisingerite or neotocite.

IMA Status:

Discredited IMA 2006

Locality:

Broken Hill, New South Wales, Australia. Link to MinDat.org Location Data.

Name Origin:

Named for C. Sturt.

Sturtite Image

Images:

Sturtite

Comments: Dark red-brown resinous massive sturtite.
Location: North Mine, Broken Hill, New South Wales, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Sturtite Crystallography

Crystal System:

Amorphous- No Crystals

Physical Properties of Sturtite

Color:

Black.

Density:

2.05

Hardness:

3-3.5 - Calcite-Copper Penny

Luster:

Vitreous - Greasy

Streak:

yellowish brown

Optical Properties of Sturtite

Optical Data:

NCalc= 1.53 - from Gladstone-Dale relationship (KC = 0.2609) where Ncalc=Dmeas*KC+1

Calculated Properties of Sturtite

Electron Density:

Bulk Density (Electron Density)=2.10 gm/cc
note: Specific Gravity of Sturtite =2.05 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Sturtite= 5.00 barns/electron
U=PE_Sturtite x rElectron Density= 10.51 barns/cc.

Radioactivity:

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

Sturtite Classification

Dana Class:

78.00.00.00 (78)Unclassified Silicate Minerals

(78.00)Without Dana Classification Numbers

(78.00.00)Silicate, Unclassified

78.00.00.00 Almbosite? Fe5Fe4V4Si3O27 Ortho ? Ortho

78.00.00.00 Chelyabinskite* (Ca,Mg)3Si(OH)6(SO4,CO3)2•9(H2O) Unk Ortho

78.00.00.00 Cryptophyllite K2Ca[Si4O10]•5H2O P 2₁/n 2/m

78.00.00.00 IMA2007-041T Na2[Ti4O2(OH)2(SiO4)3]•6H2O R 3m 3m

78.00.00.00 IMA2009-001 Ba5(Ca,REE,Y)22(Ti,Nb)18(SiO4)4[(PO4),(SiO4)]4(BO3)9O22[(OH),F]43(H2O)1.5 R 3 3

78.00.00.00 Iddingsite? MgO.Fe2O3.3SiO2•4(H2O) Ortho

78.00.00.00 Ivanyukite-Cu Cu[Ti4(OH)2O2(SiO4)3]•7H2O P 4 3m 4 3m

78.00.00.00 Ivanyukite-K K2[Ti4(OH)2O2(SiO4)3]•9H2O P 4 3m 4 3m

78.00.00.00 Ivanyukite-Na Na2[Ti4O2(OH)2(SiO4)3]•6H2O P 4 3m 4 3m

78.00.00.00 Plumbophyllite Pb2Si4O10•H2O P bcn 2/m 2/m 2/m

78.00.00.00 Sturtite? (Fe3)(Mn2,Ca,Mg)Si4O10(OH)3•10(H2O) None

Strunz Class:

09.ED.10 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.ED -Phyllosilicates with kaolinite layers

09.ED.10 Endellite! Al2Si2O5(OH)4•2(H2O) Cc m

09.ED.10 Hisingerite Fe2Si2O5(OH)4•2(H2O) Unk Mono

09.ED.10 Halloysite Al2Si2O5(OH)4 Cc m

09.ED.10 Sturtite? (Fe3)(Mn2,Ca,Mg)Si4O10(OH)3•10(H2O) None

Other Sturtite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Sturtite :
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 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Ask about Sturtite here :
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Print or Cut-and-Paste your Sturtite Specimen Label here :

Sturtite

(Fe3+)(Mn2+,Ca,Mg)Si4O10(OH)3•10(H2O)
Dana No: 78.00.00.00 Strunz No: 09.ED.10
Locality:

Notes: