Spadaite Mineral Data

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



[Newest Minerals] [Minerals for Sale] [Educational Articles] [About Us] [Image Gallery]
John Betts - Fine Minerals
Classic minerals, out-of-print books & magazines, plus informative articles for collectors


General Spadaite Information

Help on Chemical Formula: Chemical Formula: MgSiO2(OH)2•(H2O) (?)
Help on Composition: Composition: Molecular Weight = 136.42 gm
   Magnesium  17.82 %  Mg   29.54 % MgO
   Silicon    20.59 %  Si   44.04 % SiO2
   Hydrogen    2.96 %  H    26.41 % H2O
   Oxygen     58.64 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg(SiO2)(OH)2•(H2O)
Help on Environment: Environment: Found replacing tactite minerals.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1843
Help on Locality: Locality: Capo di Bove, near Rome, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Lavino Spada (De Medici) (1801-1863), Italian politicioan and amateur mineralogist.
 

Spadaite Image

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

Spadaite

Comments: Tan mottled silky fibrous spadaite, slightly flexible coatings.
Location: Palos Verdes Hills, Los Angeles County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Spadaite Crystallography
Help on Crystal System: Crystal System: Orthorhombic
 

Physical Properties of Spadaite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, Cream, Pinkish.
Help on Density: Density: 2.2
Help on Diaphaneity: Diaphaneity: Translucent to subtranslucent
Help on Habit: Habit: Amorphous - No crystalline form or imitative shape.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Dull
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Spadaite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.004 (Superior) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2414,KC= 0.2405
Ncalc = 1.53
Help on Optical Data: Optical Data: Biaxial (+), a=1.521, b=1.525-1.53, g=1.545, bire=0.0240
Help on Pleochroism (x): Pleochroism (x): none.
Help on Pleochroism (y): Pleochroism (y): none.
Help on Pleochroism (z): Pleochroism (z): none.
 

Calculated Properties of Spadaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.26 gm/cc
note: Specific Gravity of Spadaite =2.20 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PESpadaite = 1.25 barns/electron
U=PESpadaite x rElectron Density= 2.83 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Spadaite is Not Radioactive
 

Spadaite Classification
Help on Dana Class: Dana Class: 78.07.14.01 (78)Unclassified silicates
  (78.07)wholly unclassified silicates
  (78.07.14)Dana Group
 
78.07.14.01 Spadaite MgSiO2(OH)2•(H2O)(?) Ortho
 
78.07.14.02 Chesnokovite! Na2[SiO2(OH)2]•8H2O I bca 2/m 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 Spadaite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Spadaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info

Search for Spadaite using:

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

Visit our Advertisers for Spadaite :

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 Spadaite Mineral Data :

Ask about Spadaite 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 Spadaite Specimen Label here :

Spadaite

MgSiO2(OH)2•(H2O) (?)
Dana No: 78.07.14.01 Strunz No: 09.EC.45
Locality:

 

Notes: