Stevensite Mineral Data + Say STEVENSITE


[Mineral Specimens] [Our best] [Rare specimens] [Latest updates] [Home Page]
Fine Minerals, Moldavites, Jewellery, Meteorites and Fossils
Rockshop.cz is based in Prague, Czech republic

General Stevensite Information

Help on Chemical  Formula: Chemical Formula: (Ca0.5,Na)0.33(Mg,Fe++)3Si4O10(OH)2·n(H2O)
Help on Composition: Composition: Molecular Weight = 471.23 gm
   Sodium      1.61 %  Na    2.17 % Na2O
   Calcium     1.28 %  Ca    1.79 % CaO
   Magnesium  14.44 %  Mg   23.95 % MgO
   Iron        2.37 %  Fe    3.05 % FeO
   Silicon    23.84 %  Si   51.00 % SiO2
   Hydrogen    2.14 %  H    19.11 % H2O
   Oxygen     54.32 %  O
             ______        ______ 
             100.00 %      101.07 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca0.15Na0.33Mg2.8Fe2+0.2Si4O10(OH)2·4(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1873
Help on Locality: Locality: Railway tunnel, Bergen Hill, Hudson County, New Jersey, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for E. A. Stevens, founder of Stevens Institute of Technology, Hoboken, New Jersey, USA.
Help on Synonym: Synonym: Cerolite
  Jurupaite
  Kerolite
 

Stevensite Image

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

Stevensite

Comments: Granular massive stevensite.
Location: Langban, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Stevensite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5775:1:1.6798
Help on Cell Dimensions: Cell Dimensions: a = 5.26, b = 9.108, c = 15.3, Z = 2; beta = 90° V = 732.99 Den(Calc)= 2.13
Help on Crystal System: Crystal System: MonoclinicSpace Group: Unk (ORTH ?)
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 15.5(1), 4.53(0.35), 1.518(0.15),
 

Physical Properties of Stevensite

Help on Cleavage: Cleavage: [001] Perfect
Help on Color: Color: Beige white, Yellow brown, Pink.
Help on Density: Density: 2.15 - 2.75, Average = 2.45
Help on Diaphaniety: Diaphaniety: Translucent
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 4 - Fluorite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Resinous
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Stevensite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.137 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2645,KPDmeas= 0.2299,KC= 0.2326
Help on Optical Data: Optical Data: Biaxial (+), a=1.56, b=1.56, g=1.57, bire=0.0100
 

Calculated Properties of Stevensite

Help on Electron Density: Electron Density:

relectron=2.49 gm/cc
note: rStevensite =2.45 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.02635
Boson Index = 0.97365
Help on Photoelectric: Photoelectric:

PEStevensite = 2.14 barns/electron
U=PEStevensite x relectron= 5.32 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Stevensite is Not Radioactive

 

Stevensite Classification

Help on  Dana Class: Dana Class: 71.3.1b.6 (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.3)with 2:1 clays
  (71.3.1b)Smectite group (Trioctahedral Smectites)
 
71.3.1b.1 Sobotkite? (K,Ca0.5)0.33(Mg,Al)3(Si3Al)O10(OH)2·1-5(H2O) Unk. Mono
 
71.3.1b.2 Saponite (Ca/2,Na)0,3(Mg,Fe)3(Si,Al)4O10(OH)2·4(H2O) C 2/m 2/m
 
71.3.1b.2a Ferrosaponite! Ca0.3(Fe,Mg,Fe)3(Si,Al)4O10(OH)2·4(H2O) C? Mono
 
71.3.1b.3 Sauconite Na0,3Zn3(Si,Al)4O10(OH)2·4(H2O) C 2/m 2/m
 
71.3.1b.4 Hectorite Na0,3(Mg,Li)3Si4O10(OH)2 C 2/m 2/m
 
71.3.1b.5 Pimelite Ni3Si4O10(OH)2·4(H2O) Unk. Hex
 
71.3.1b.6 Stevensite (Ca0.5,Na)0.33(Mg,Fe)3Si4O10(OH)2·n(H2O) Unk (ORTH ?) Mono
 
71.3.1b.7 Yakhontovite (Ca,K)0.5(Cu,Fe,Mg)2Si4O10(OH)2·3(H2O) C 2/m 2/m
 
71.3.1b.8 Zincsilite Zn3Si4O10(OH)2·4(H2O)(?) C 2/m ? 2/m
Help on  Strunz Class: Strunz Class: VIII/H.20-40 VIII - Silicates
  VIII/H - Phyllosilicates (layered) Mica like with [Si4O10]4- and related groups
  VIII/H.20 - Hectorite - Zincsilite series
 
VIII/H.20-10 Hectorite Na0,3(Mg,Li)3Si4O10(OH)2 C 2/m 2/m
 
VIII/H.20-20 Saponite (Ca/2,Na)0,3(Mg,Fe)3(Si,Al)4O10(OH)2·4(H2O) C 2/m 2/m
 
VIII/H.20-27 Ferrosaponite! Ca0.3(Fe,Mg,Fe)3(Si,Al)4O10(OH)2·4(H2O) C? Mono
 
VIII/H.20-30 Spadaite MgSiO2(OH)2·(H2O)(?) None
 
VIII/H.20-40 Stevensite (Ca0.5,Na)0.33(Mg,Fe)3Si4O10(OH)2·n(H2O) Unk (ORTH ?) Mono
 
VIII/H.20-50 Sauconite Na0,3Zn3(Si,Al)4O10(OH)2·4(H2O) C 2/m 2/m
 
VIII/H.20-60 Zincsilite Zn3Si4O10(OH)2·4(H2O)(?) C 2/m ? 2/m
 

Other Stevensite Information

Help on References: References: PHYS. PROP.(Dana8) OPTIC PROP.(Dana)
Help on See Also: See Also: Links to other databases for Stevensite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 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 - Minerals of Wisconsin 14 -QUT Mineral Atlas 15 -École des Mines de Paris

Search for Stevensite using:

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

Visit our Advertisers for Stevensite :
AA Mineral Specimens
B and L Minerals
Crystal Vaults
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Stevensite Mineral Data :

Ask about Stevensite 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 Español

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

Stevensite

(Ca0.5,Na)0.33(Mg,Fe++)3Si4O10(OH)2·n(H2O)
Dana No: 71.3.1b.6 Strunz No: VIII/H.20-40
Locality:

 

Notes:

 

 
   
 
Go To Webmineral Home Crystallography X-Ray D-Spacing Table Chemical Composition
Dana Classification Strunz Classification Table of Mineral Properties Alphabetical Listing of Minerals
Search Webmineral Photo Gallery of Mineral Images Help Files Links