Starkeyite  Mineral Data

Starkeyite Mineral Data

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

Advertisment
Our Mission is Simple: RMS will be the go-to portal for all mineral, gem and rock shows in the USA
Your premier supplier of quality mineral specimens from Southern Africa and the world at large
The Mineral News newsletter has expanded to sixteen (16) pages a month and it has added significant features such as frequent book reviews, photographs to supplement new mineral descriptions. Occasional color issues are produced as well.
A Bijoux.com is an online store specialized in the sale on the internet of precious stones , gems , minerals and jewels for individuals and professionals

General Starkeyite Information

Help on Chemical  Formula: Chemical Formula: MgSO4•4(H2O)
Help on Composition: Composition: Molecular Weight = 192.43 gm
   Magnesium  12.63 %  Mg   20.94 % MgO
   Hydrogen    4.19 %  H    37.45 % H2O
   Sulfur     16.66 %  S    41.61 % SO3
   Oxygen     66.52 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg(SO4)•4(H2O)
Help on Environment: Environment: Secondary mineral formed in the presence of iron sulfides; as efflorescences from evaporation of surface and ground waters.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1956
Help on Locality: Locality: Starkey mine, Madison Co., Missouri, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the localtiy.
Help on Name Pronunciation: Name Pronunciation: Starkeyite + Pronunciation Say STARKEYITE
Help on Synonym: Synonym: ICSD 23911
  PDF 24-720
 

Starkeyite Image

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

Starkeyite

Comments: Translucent starkeyite on rock.
Location: Barvue Mine, Barville, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Starkeyite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4353:1:0.581
Help on Cell Dimensions: Cell Dimensions: a = 5.922, b = 13.604, c = 7.905, Z = 4; beta = 90.85° V = 636.78 Den(Calc)= 2.01
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.95(1), 4.48(1), 5.5(0.6),
Click Here for Large Starkeyite 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


Baur W H , Acta Crystallographica , 15 (1962) p.815-826, Zur kristallchemie der salzhydrate. Die kristallstrukturen von MgSO4*4H2O, (leonhardtit) und FeSO4*4H2O (rozenit), Locality: synthetic

View Additional jPOWD Structure files for Starkeyite
[1]
 

Physical Properties of Starkeyite

Help on Color: Color: White.
Help on Density: Density: 2.007
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Earthy (Dull)
Help on Streak: Streak: white
 

Optical Properties of Starkeyite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.009 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2451,KPDmeas= 0.2455,KC= 0.2429
Ncalc = 1.49
Help on Optical Data: Optical Data: Biaxial (+), a=1.49, b=1.491, g=1.497, bire=0.0070, 2V(Calc)=46, 2V(Meas)=50.
 

Calculated Properties of Starkeyite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.09 gm/cc
note: Specific Gravity of Starkeyite =2.01 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEStarkeyite = 1.38 barns/electron
U=PEStarkeyite x rElectron Density= 2.88 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Starkeyite is Not Radioactive
 

Starkeyite Classification

Help on  Dana Class: Dana Class: 29.06.06.02 (29)Hydrated Acid and Sulfates
  (29.06)where A XO4 · x(H2O)
  (29.06.06)Rozenite Group (Monoclinic)
 
29.06.06.01 Rozenite FeSO4•4(H2O) P 21/n 2/m
 
29.06.06.02 Starkeyite MgSO4•4(H2O) P 21/n 2/m
 
29.06.06.03 Ilesite (Mn,Zn,Fe)SO4•4(H2O) P 21/n 2/m
 
29.06.06.04 Aplowite (Co,Mn,Ni)SO4•4(H2O) P 21/m 2/m
 
29.06.06.05 Boyleite (Zn,Mg)SO4•4(H2O) P 21/n 2/m
 
29.06.06.06 IMA2002-034! CdSO4•4(H2O) P 21/n 2/m
Help on  Strunz Class: Strunz Class: 07.CB.15 07 - SULFATES (SELENATES, TELLURATES)
  07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O
  07.CB -With only medium-sized cations
 
07.CB.15 Boyleite (Zn,Mg)SO4•4(H2O) P 21/n 2/m
 
07.CB.15 Aplowite (Co,Mn,Ni)SO4•4(H2O) P 21/m 2/m
 
07.CB.15 Ilesite (Mn,Zn,Fe)SO4•4(H2O) P 21/n 2/m
 
07.CB.15 Rozenite FeSO4•4(H2O) P 21/n 2/m
 
07.CB.15 Starkeyite MgSO4•4(H2O) P 21/n 2/m
 
07.CB.15 IMA2002-034! CdSO4•4(H2O) P 21/n 2/m
 

Other Starkeyite Information

Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Starkeyite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

Search for Starkeyite using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Starkeyite :

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

Ask about Starkeyite 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 Starkeyite Specimen Label here :

Starkeyite

MgSO4•4(H2O)
Dana No: 29.06.06.02 Strunz No: 07.CB.15
Locality:

 

Notes: