Sobotkite Mineral Data (original) (raw)

General Sobotkite Information

Help on Chemical Formula: Chemical Formula:

(K,Ca0.5)0.33(Mg,Al)3(Si3Al)O10(OH)2•1-5(H2O)

Help on Composition: Composition:

Molecular Weight = 441.54 gm

Potassium 0.89 % K 1.07 % K2O

Calcium 2.72 % Ca 3.81 % CaO

Magnesium 11.56 % Mg 19.17 % MgO

Aluminum 11.61 % Al 21.94 % Al2O3

Silicon 19.08 % Si 40.82 % SiO2

Hydrogen 1.60 % H 14.28 % H2O

Oxygen 52.54 % O

______ ______

100.00 % 101.09 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

K0.1Ca0.33(Mg0.7)3(Al0.3)Si3AlO10(OH)2•2.5(H2O)

Help on Environment: Environment:

Laterite deposit on ultra-basic rocks. Discredited in 1987 as being aluminum saponite

Help on IMA Status: IMA Status:

Discredited IMA 1987 - Approved IMA 1976

Help on Locality: Locality:

Mt. Sobotka, Godolow-Jordanow massif, Wiry, Lower Silesia, Poland. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named in 1976 for the locality.

Help on Synonym: Synonym:

Discredited IMA 1987

Sobotkite Image

Click Here for Larger Sobotkite Image in a New Browser Window Images:

Click Here for Larger Sobotkite Image Sobotkite Comments: Massive, fine-grained rose-colored sobotkite (saponite). Location: Cuya, Atacama, Chile.Scale: See Specimen Tray. © Diederik Visser

Sobotkite Crystallography

Help on Crystal System: Crystal System:

MonoclinicSpace Group: Unk.

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 4.48(0.9), 14.5(0.7), 1.527(0.6),2.51(0.6), 2.61(0.6), 2.35(0.5), 2.41(0.5),

Physical Properties of Sobotkite

Help on Color: Color:

Pale green.

Help on Density: Density:

2.31

Help on Habit: Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Help on Hardness: Hardness:

3 - Calcite

Optical Properties of Sobotkite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= 0.001 (Superior) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2271,KC= 0.2273
Ncalc = 1.53

Help on Optical Data: Optical Data:

Biaxial (?), a=1.513, b=1.525, g=1.536, bire=0.0230

Calculated Properties of Sobotkite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=2.33 gm/cc
note: Specific Gravity of Sobotkite =2.31 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Help on Photoelectric: Photoelectric:

PESobotkite = 1.77 barns/electron
U=PESobotkite x relectron= 4.13 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 12.88 (Gamma Ray American Petroleum Institute Units)
Concentration of Sobotkite per GRapi unit = 7.76 (%)

Estimated Radioactivity from Sobotkite - barely detectable

Sobotkite Classification

Help on Dana Class: Dana Class:

71.03.01b.01 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.03)with 2:1 clays

(71.03.01b)Smectite group (Trioctahedral Smectites)

71.03.01b.01 Sobotkite? (K,Ca0.5)0.33(Mg,Al)3(Si3Al)O10(OH)2•1-5(H2O) Unk. Mono

71.03.01b.02 Saponite (Ca/2,Na)0,3(Mg,Fe)3(Si,Al)4O10(OH)2•4(H2O) C 2/m 2/m

71.03.01b.02a Ferrosaponite! Ca0.3(Fe,Mg,Fe)3(Si,Al)4O10(OH)2•4(H2O) C? Mono

71.03.01b.03 Sauconite Na0,3Zn3(Si,Al)4O10(OH)2•4(H2O) C 2/m 2/m

71.03.01b.04 Hectorite Na0,3(Mg,Li)3Si4O10(OH)2 C 2/m 2/m

71.03.01b.05 Pimelite? Ni3Si4O10(OH)2•4(H2O) Unk. Hex

71.03.01b.06 Stevensite (Ca0.5,Na)0.33(Mg,Fe)3Si4O10(OH)2•n(H2O) Unk (ORTH ?) Mono

71.03.01b.07 Yakhontovite (Ca,K)0.5(Cu,Fe,Mg)2Si4O10(OH)2•3(H2O) C 2/m 2/m

71.03.01b.08 Zincsilite Zn3Si4O10(OH)2•4(H2O)(?) C 2/m ? 2/m

Help on Strunz Class: Strunz Class:

09.EC.45 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets

09.EC.45 Griffithite* 4(Mg,Fe,Ca)O.(Al,Fe)2O3.5SiO2•7(H2O) Mono

09.EC.45 Hectorite Na0,3(Mg,Li)3Si4O10(OH)2 C 2/m 2/m

09.EC.45 Swinefordite (Li,Ca0.5,Na)0.72(Li,Al,Mg)2.66(Si,Al)4O10(OH,F)2•2(H2O) C 2/m (MON or ORTH) 2/m

09.EC.45 Zincsilite Zn3Si4O10(OH)2•4(H2O)(?) C 2/m ? 2/m

09.EC.45 Saponite (Ca/2,Na)0,3(Mg,Fe)3(Si,Al)4O10(OH)2•4(H2O) C 2/m 2/m

09.EC.45 Sauconite Na0,3Zn3(Si,Al)4O10(OH)2•4(H2O) C 2/m 2/m

09.EC.45 Spadaite MgSiO2(OH)2•(H2O)(?) Ortho

09.EC.45 Sobotkite? (K,Ca0.5)0.33(Mg,Al)3(Si3Al)O10(OH)2•1-5(H2O) Unk. Mono

09.EC.45 Stevensite (Ca0.5,Na)0.33(Mg,Fe)3Si4O10(OH)2•n(H2O) Unk (ORTH ?) Mono

09.EC.45 Ferrosaponite! Ca0.3(Fe,Mg,Fe)3(Si,Al)4O10(OH)2•4(H2O) C? Mono

Other Sobotkite Information

Help on References: References:

NAME( Dana8) OPTIC PROP.(Dana8)

Help on See Also: See Also:

Links to other databases for Sobotkite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Sobotkite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Sobotkite :

A Bijoux Google Search for Sobotkite
Adam's Minerals Google Search for Sobotkite
Cape Minerals Google Search for Sobotkite
Dakota Matrix Minerals Google Search for Sobotkite
Excalibur Mineral Corp. Google Search for Sobotkite
Exceptional Minerals Google Search for Sobotkite
John Betts Fine Minerals Search for Sobotkite
McDougall Minerals Google Search for Sobotkite
Mineral News Website Link
Rock and Mineral Shows Google Search for Sobotkite
Weinrich Minerals, Inc. Google Search for Sobotkite

Ask about Sobotkite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa�ol

Print or Cut-and-Paste your Sobotkite Specimen Label here :

Sobotkite

(K,Ca0.5)0.33(Mg,Al)3(Si3Al)O10(OH)2•1-5(H2O)
Dana No: 71.03.01b.01 Strunz No: 09.EC.45
Locality:

Notes: