Thaumasite Mineral Data

Thaumasite Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images       News Help About


AA Mineral Sepcimens
[What's New] [Mineral Galleries] [About Us] [Contacts] [Login]
At AA Mineral Specimens, we source quality Mineral Specimens, Fossils, Gemstones,
Decorative Stones, Lapidary Material and Specimen Sets world-wide


General Thaumasite Information

Help on Chemical Formula: Chemical Formula: Ca3Si(CO3)(SO4)(OH)6•12(H2O)
Help on Composition: Composition: Molecular Weight = 622.62 gm
   Calcium   19.31 %  Ca   27.02 % CaO
   Silicon    4.51 %  Si    9.65 % SiO2
   Hydrogen   4.86 %  H    43.40 % H2O
   Carbon     1.93 %  C     7.07 % CO2
   Sulfur     5.15 %  S    12.86 % SO3
   Oxygen    64.24 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca3Si(CO3)(SO4)(OH)6•12(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1878
Help on Locality: Locality: Bjelke mine, near Areskutan, Jamtland, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek thaumasion - "surprising" in allusion to the chemical composition.
Help on Name Pronunciation: Name Pronunciation: Thaumasite + Pronunciation Say THAUMASITE
Help on Synonym: Synonym: ICSD 31247
  PDF 25-128
 

Thaumasite Image

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

Thaumasite

Comments: Doubly-terminated Thaumasite.
Location: N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: 1 cm across.
© John Veevaert
Click Here for Larger Thaumasite Image in a New Browser Window Images:
Click Here for Larger Thaumasite Image

Thaumasite

Comments: Transparent crystal of thaumasite.
Location: N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: 1.1 x 0.4 cm.
© John Veevaert

Thaumasite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:0.94288
Help on Cell Dimensions: Cell Dimensions: a = 11.03, c = 10.4, Z = 2; V = 1,095.76 Den(Calc)= 1.89
Help on Crystal System: Crystal System: Hexagonal - DipyramidalH-M Symbol (6/m) Space Group: P 63/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.56(1), 5.51(0.4), 3.41(0.2),
Click Here for Large Thaumasite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
 Help on Above


Jacobsen S D , Smyth J R , Swope R J , Physics and Chemistry of Minerals , 30 (2003) p.321-329, Thermal expansion of hydrated six-coordinated silicon in thaumasite,, Ca3Si(OH)6(CO3)(SO4).12H2O, Sample: T = 130 K, Locality: unknown

View Additional jPOWD Structure files for Thaumasite
[1]
 

Physical Properties of Thaumasite

Help on Cleavage: Cleavage: {???} Poor
Help on Color: Color: Colorless, White.
Help on Density: Density: 1.88 - 1.9, Average = 1.89
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Massive - Fibrous - Distinctly fibrous fine-grained forms.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luminescence: Luminescence: Fluorescent, Long UV=dull uneven white.
Help on Luster: Luster: Vitreous - Silky
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Thaumasite

Help on Dichroism (e): Dichroism (e): none.
Help on Dichroism (w): Dichroism (w): none.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.016 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2579,KPDmeas= 0.2579,KC= 0.2621
Ncalc = 1.49 - 1.5
Help on Optical Data: Optical Data: Uniaxial (-), e=1.468, w=1.507, bire=0.0390.
 

Calculated Properties of Thaumasite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.98 gm/cc
note: Specific Gravity of Thaumasite =1.89 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0032813823
Boson Index = 0.9967186177
Help on Photoelectric: Photoelectric: PEThaumasite = 2.91 barns/electron
U=PEThaumasite x rElectron Density= 5.75 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Thaumasite is Not Radioactive
 

Thaumasite Classification
Help on Dana Class: Dana Class: 32.04.04.04 (32)Compound Sulfates
  (32.04)(hydrous) with poly-anionic formula
  (32.04.04)Charlesite Group
 
32.04.04.01 Charlesite Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12•26(H2O) P 31c 3m
 
32.04.04.02 Sturmanite Ca6(Fe,Al,Mn)2(SO4)2[B(OH)4](OH)12•25(H2O) P 31c 3m
 
32.04.04.03 Jouravskite Ca3Mn(SO4,CO3)2(OH)6•12(H2O) P 63/m 6/m
 
32.04.04.04 Thaumasite Ca3Si(CO3)(SO4)(OH)6•12(H2O) P 63/m 6/m
 
32.04.04.05 Carraraite! Ca3Ge(OH)6(SO4)(CO3)•12H2O P 63/m, or P 63 Hex
Help on Strunz Class: Strunz Class: 07.DG.15 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DG -With large and medium sized cations; with NO3, CO3, B(OH)4, SiO4 or IO3
 
07.DG.15 Bentorite Ca6(Cr,Al)2(SO4)3(OH)12•26(H2O) P 63/mmc 6/m 2/m 2/m
 
07.DG.15 Charlesite Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12•26(H2O) P 31c 3m
 
07.DG.15 Ettringite Ca6Al2(SO4)3(OH)12•26(H2O) P 63/mmc 6/m 2/m 2/m
 
07.DG.15 Jouravskite Ca3Mn(SO4,CO3)2(OH)6•12(H2O) P 63/m 6/m
 
07.DG.15 Sturmanite Ca6(Fe,Al,Mn)2(SO4)2[B(OH)4](OH)12•25(H2O) P 31c 3m
 
07.DG.15 Thaumasite Ca3Si(CO3)(SO4)(OH)6•12(H2O) P 63/m 6/m
 
07.DG.15 Buryatite! Ca3(Si,Fe,Al)[SO4][B(OH)4](OH,O)6•12(H2O) P 31c 3m
 
07.DG.15 Carraraite! Ca3Ge(OH)6(SO4)(CO3)•12H2O P 63/m, or P 63 Hex
 

Other Thaumasite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Thaumasite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - MinMax(Deutsch)
14 - MinMax(English)
15 - Mineralienatlas (Deutsch)
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - WWW-MINCRYST

Search for Thaumasite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Thaumasite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

Heliodor

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Thaumasite Mineral Data :

Ask about Thaumasite 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 Espaņol

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

Thaumasite

Ca3Si(CO3)(SO4)(OH)6•12(H2O)
Dana No: 32.04.04.04 Strunz No: 07.DG.15
Locality:

 

Notes: