Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (2 online) Mindat Auctions

Starkeyite

Big Photo

Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex Co., New Jersey, USA
© 2008, JGW

Formula:
MgSO
 
4
·4H
 
2
O
System:MonoclinicColour:White to yellowish or ...
Lustre:DullHardness:2 - 3
Name:Named in 1956 for the type locality, the Starkey Mine in Madison County, Missouri, USA.


Rozenite Group.

This is a rare mineral, found at only a few localities, then it is usually found as white to yellowish or greenish efflorescenes. Good crystals are extremely rare, perhaps unheard of.

Classification of Starkeyite

IMA status:Approved
Strunz 8th edition ID:6/0.0-10
Nickel-Strunz 10th (pending) edition ID:7.CB.15

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
B : With only medium-sized cations
Dana 7th edition ID:29.6.6.2
Dana 8th edition ID:29.6.6.2

29 : HYDRATED ACID AND NORMAL SULFATES
6 : AXO4·xH2O
Hey's CIM Ref.:25.3.3

25 : Sulphates
3 : Sulphates of Mg
mindat.org URL:http://www.mindat.org/min-3752.html
Please feel free to link to this page.

Type Occurrence of Starkeyite

Type Locality:Starkey mine, Madison Co., Missouri, USA

Occurrences of Starkeyite

Geological Setting:A secondary mineral found in the oxidized zone of sulfide mineral deposits, resulting from the decomposition of pyrite and marcasite.

Physical Properties of Starkeyite

Lustre:Dull
Diaphaneity (Transparency):Translucent, Opaque
Colour:White to yellowish or greenish.
Streak:White
Hardness (Mohs):2 - 3
Tenacity:Brittle
Fracture:Irregular/Uneven
Density (measured):2 g/cm3
Density (calculated):2.007 g/cm3

Crystallography of Starkeyite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/b {P1 1 21/b} {P21/c} {P1 21/c 1} {P21/a}
Cell Parameters:a = 5.92Å, b = 13.6Å, c = 7.91Å
β = 90.85°
Ratio:a:b:c = 0.435 : 1 : 0.582
Unit Cell Volume:V 636.78 ų (Calculated from Unit Cell)
Z:4
Morphology:Forms not reported, typically found as powdery efflorescences.
Twinning:Not reported.
X-Ray Powder Diffraction:
d-spacingIntensity
6.83(50)
5.43(80)
4.70(40)
4.46(100)
3.95(70)
3.40(50)
3.22(40)

Optical Data of Starkeyite

Type:Biaxial (+)
RI values: nα = 1.490 nβ = 1.491 nγ = 1.497
2V:Measured: 50° , Calculated: 46°
Maximum Birefringence:δ = 0.007

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:none

Chemical Properties of Starkeyite

Formula:
MgSO
 
4
·4H
 
2
O
Essential elements:H, Mg, O, S
All elements listed in formula:H, Mg, O, S
Analytical Data:Soluble in water
Relationship of Starkeyite to other Species
Member of Group:
Rozenite Group:
MSO
 
4
·4H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- + 
7.CB.05Dwornikite
(Ni,Fe)SO
 
4
·H
 
2
O
7.CB.05Gunningite
(Zn,Mn)SO
 
4
·H
 
2
O
7.CB.05Kieserite
MgSO
 
4
·H
 
2
O
7.CB.05Poitevinite
(Cu,Fe,Zn)SO
 
4
·H
 
2
O
7.CB.05Szmikite
MnSO
 
4
·H
 
2
O
7.CB.05Szomolnokite
FeSO
 
4
·H
 
2
O
7.CB.05Cobaltkieserite
CoSO
 
4
·H
 
2
O
7.CB.07Sanderite
MgSO
 
4
·2H
 
2
O
7.CB.10Bonattite
CuSO
 
4
·3H
 
2
O
7.CB.15Aplowite
(Co,Mn,Ni)SO
 
4
·4H
 
2
O
7.CB.15Boyleite
(Zn,Mg)SO
 
4
·4H
 
2
O
7.CB.15Ilesite
(Mn,Zn,Fe)SO
 
4
·4H
 
2
O
7.CB.15Rozenite
FeSO
 
4
·4H
 
2
O
7.CB.15IMA2002-034
CdSO
 
4
·4H
 
2
O
7.CB.20Chalcanthite
CuSO
 
4
·5H
 
2
O
7.CB.20Jôkokuite
MnSO
 
4
·5H
 
2
O
7.CB.20Pentahydrite
MgSO
 
4
·5H
 
2
O
7.CB.20Siderotil
FeSO
 
4
·5H
 
2
O
7.CB.25Bianchite
(Zn,Fe)SO
 
4
·6H
 
2
O
7.CB.25Chvaleticeite
(Mn,Mg)SO
 
4
·6H
 
2
O
7.CB.25Ferrohexahydrite
FeSO
 
4
·6H
 
2
O
7.CB.25Hexahydrite
MgSO
 
4
·6H
 
2
O
7.CB.25Moorhouseite
(Co,Ni,Mn)SO
 
4
·6H
 
2
O
7.CB.25Nickelhexahydrite
(Ni,Mg,Fe)SO
 
4
·6H
 
2
O
7.CB.30Retgersite
NiSO
 
4
·6H
 
2
O
7.CB.35Bieberite
CoSO
 
4
·7H
 
2
O
7.CB.35Boothite
CuSO
 
4
·7H
 
2
O
7.CB.35Mallardite
MnSO
 
4
·7H
 
2
O
7.CB.35Melanterite
FeSO
 
4
·7H
 
2
O
7.CB.35Zincmelanterite
(Zn,Cu,Fe)SO
 
4
·7H
 
2
O
7.CB.35Alpersite
(Mg,Cu)[SO
 
4
] · 7H
 
2
O
7.CB.40Epsomite
MgSO
 
4
·7H
 
2
O
7.CB.40Goslarite
ZnSO
 
4
·7H
 
2
O
7.CB.40Morenosite
NiSO
 
4
·7H
 
2
O
7.CB.45Alunogen
Al
 
2
(SO
 
4
)
 
3
·17H
 
2
O
7.CB.45Meta-alunogen
Al
 
2
(SO
 
4
)
 
3
·12H
 
2
O
7.CB.55Coquimbite
Fe
 
2
(SO
 
4
)
 
3
·9H
 
2
O
7.CB.55Paracoquimbite
Fe
 
2
(SO
 
4
)
 
3
·9H
 
2
O
7.CB.55Rhomboclase
(H
 
5
O
 
2
)Fe
3+
 
(SO
 
4
)
 
2
·2H
 
2
O
7.CB.60Kornelite
Fe
 
2
(SO
 
4
)
 
3
·7H
 
2
O
7.CB.65Quenstedtite
Fe
 
2
(SO
 
4
)
 
3
·10H
 
2
O
7.CB.70Lausenite
Fe
 
2
(SO
 
4
)
 
3
·6H
 
2
O
7.CB.75Lishizhenite
ZnFe
 
2
(SO
 
4
)
 
4
·14H
 
2
O
7.CB.75Römerite
Fe
2+
 
Fe
3+
2
(SO
 
4
)
 
4
·14H
 
2
O
7.CB.80Ransomite
CuFe
 
2
(SO
 
4
)
 
4
·6H
 
2
O
7.CB.85Apjohnite
Mn
2+
 
Al
 
2
(SO
 
4
)
 
4
·22H
 
2
O
7.CB.85Bílinite
Fe
2+
 
Fe
3+
2
(SO
 
4
)
 
4
·22H
 
2
O
7.CB.85Dietrichite
(Zn,Fe
2+
 
,Mn
2+
 
)Al
 
2
(SO
 
4
)
 
4
·22H
 
2
O
7.CB.85Halotrichite
FeAl
 
2
(SO
 
4
)
 
4
·22H
 
2
O
7.CB.85Pickeringite
MgAl
 
2
(SO
 
4
)
 
4
·22H
 
2
O
7.CB.85Redingtonite
(Fe
2+
 
,Mg,Ni)(Cr,Al)
 
2
(SO
 
4
)
 
4
·22H
 
2
O
7.CB.85Wupatkiite
(Co,Mg,Ni)Al
 
2
(SO
 
4
)
 
4
·22H
 
2
O
7.CB.90Meridianiite
MgSO
 
4
·11H
 
2
O
Related Minerals - Hey's Index Grouping:

- + 
25.3.1Kieserite
MgSO
 
4
·H
 
2
O
25.3.2Sanderite
MgSO
 
4
·2H
 
2
O
25.3.4Pentahydrite
MgSO
 
4
·5H
 
2
O
25.3.5Hexahydrite
MgSO
 
4
·6H
 
2
O
25.3.6Epsomite
MgSO
 
4
·7H
 
2
O
25.3.7Caminite
Mg
 
7
[(OH)
 
4
|(SO
 
4
)
 
5
] · H
 
2
O
25.3.8Vanthoffite
Na
 
6
Mg(SO
 
4
)
 
4
25.3.9Blödite
Na
 
2
Mg(SO
 
4
)
 
2
·4H
 
2
O
25.3.10Konyaite
Na
 
2
Mg(SO
 
4
)
 
2
·5H
 
2
O
25.3.11Löweite
Na
 
12
Mg
 
7
(SO
 
4
)
 
13
25.3.12Uklonskovite
NaMg[F|SO
 
4
] · 2H
 
2
O
25.3.13Langbeinite
K
 
2
Mg
 
2
(SO
 
4
)
 
3
25.3.14Leonite
K
 
2
Mg(SO
 
4
)
 
2
·4H
 
2
O
25.3.15Picromerite
K
 
2
Mg(SO
 
4
)
 
2
·6H
 
2
O
25.3.16Efremovite
(NH
 
4
)
 
2
Mg
 
2
(SO
 
4
)
 
3
25.3.17Boussingaultite
(NH
 
4
)
 
2
Mg(SO
 
4
)
 
2
·6H
 
2
O
25.3.18Pickeringite
MgAl
 
2
(SO
 
4
)
 
4
·22H
 
2
O
Related Minerals - Dana Grouping):

- + 
29.6.6.4Aplowite
(Co,Mn,Ni)SO
 
4
·4H
 
2
O
Other Names for Starkeyite
Synonyms:
Leonhardtite
Other Languages:
German:Leonhardtit
Starkeyit
Russian:Старкеит
Spanish:Starkeyita
Varieties:
Ferroan Starkeyite
Other Information
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
References for Starkeyite
Reference List:Missouri Geological Survey and Water Resources, ser.2 (1945): 30: 209-210.



American Mineralogist (1956): 41: 662.



Canadian Mineralogist (1973): 12: 229.



Acta Crystallographica: 15: 815-826.



Acta Crystallographica: 17: 863-869.



Snetsinger, K.G. (1973) Ferroan starkeyite from Del Norte County, California. Canadian Mineralogist: 12: 229.



Snetsinger, K.G. (1975) What’s in a name: starkeyite vs. leonhardite. Mineralogical Record: 6: 144-145.



Gaines, Richard V., H. Catherine, W. Skinner, Eugene E. Foord, Brian Mason, Abraham Rosenzweig (1997), Dana's New Mineralogy : The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana: 603.


Internet Links for Starkeyite
Search Engines:












  • Look for Starkeyite on Google
    • 


  • Look for Starkeyite images on Google
    • External Links:
  • Look for Starkeyite on Webmineral
  • Look for Starkeyite on Athena Mineralogy
  • Look for Starkeyite on Wikipedia
  • Look for Starkeyite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Starkeyite in the Natural History Museum (London) online catalogue
  • Starkeyite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Top quality minerals from Kristalle of California
  • Buy minerals from Mineralium.com
  • Buy Fine Minerals from mineralsweb.com
  • Wendel Minerals  -  Auktion & Shop
  • Search for - Starkeyite - on e-Rocks Mineral Sales & Auctions
  • SpiriferMinerals.com - high quality specimens
  • Edwards Minerals - Fine Specimens
  • Rare and Unusual minerals at Mineralogical Research Company
  • High-end worldwide specimens & outstanding customer service
  • Find Starkeyite on www.crystalclassics.co.uk
    • Jobs:
  • Mining & Geology Jobs
    • Page Sponsor
    Sponsorship:This page is currently not sponsored. Click here to sponsor this page.
    Localities for Starkeyite
    






    


    

    
Hide Locality List
    

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the  symbol to view information about a locality. 
The  symbol next to localities in the list
can be used to jump to that position on the map.

    


    



     		

    (TL) indicates type locality.  ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.

    Austria
     
    

    • Styria
    

      • Ennstaler Alpen Mts
    

        • Admont
    
    		R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    Chile
     
    

    • Antofagasta Region
    

      • Antofagasta Province
    
    		Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 35
    Greece
     
    

    • Attikí (Attica; Attika) Prefecture
    

      • Lavrion (Laurion; Laurium) District
    

        • Lavrion District Mines
    

          • Sounion area
    

            • Sounion Mines
    
    		Lapis, 24, 7/8 (1999)
    Hungary
     
    

    • Borsod-Abaúj-Zemplén Co.
    

      • Borsodi Mts.
    

    


Mineral Species of Hungary, 2005
    


      • Rudabányai Mts.
    

        • Rudabánya
    
    		Szakáll: Minerals of Rudabánya, 2001
    



Szakáll: Minerals of Rudabánya, 2001
    



Szakáll: Minerals of Rudabánya, 2001
    

    • Heves Co.
    

      • Bükk Mts.
    

        • Szarvaskő
    
    		ACTA MIN. PETR. Suppl. Tomus XXXVIII., 1997
    

    • Nógrád Co.
    

      • Cserhát Mts.
    

    Italy
     
    

    • Tuscany
    

      • Livorno Province
    

        • Elba Island
    

          • Capoliveri
    

            • Cape Calamita Mine (Calamita Mine)
    
    		C.L. Garavelli (1957) – Minerali di cobalto, bonattite, e solfato di Mg esaidrato e tetraidrato tra i minerali di alterazione del giacimento elbano di Capo Calamita Calamita – Rend. Soc. Min. It., 13: 268-270.
    Japan
     
    

    • Honshu Island
    

      • Tohoku Region
    

        • Iwate Prefecture
    

          • Kamaishi City
    
    		Dr. Matsuo Nambu collection (curated by the Geological Survey of Japan)
    Morocco
     
    

    • Marrakech-Tensift-El Haouz Region
    

      • Marrakech Prefecture
    

        • Marrakech
    
    		Rachid Hakkou, Mostafa Benzaazoua and Bruno Bussière (2008): Acid Mine Drainage at the Abandoned Kettara Mine (Morocco): 1. Environmental Characterization. Mine Water and the Environment, 27, 145-159.
    Republic of Macedonia
     
    

    • Roszdan
    
    		[Rieck, B. (1993) - Famous mineral localities: Allchar, Macedonia, Mineralogical Record, 24 (6), 437-449]
    Slovakia
     
    

    • Banská Bystrica Region
    

      • Cérová Mts
    
    		Ďuďa,R., Mrázek,Z., Košuth,M., 1984: Postmagmatická zeolitová mineralizácia Cérovej vrchoviny. Min.Slovaca, 16,2,157 - 172
    


      • Štiavnica Mts
    

        • Banská Štiavnica Mining District
    

          • Vysoká
    
    		Koděra,  M.  et al., 1986 a  1990 : Topografická mineralógia Slovenska, diel  1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
    


      • Western Slovenské Rudohorie Mts
    

        • Jelšava
    
    		Koděra,  M.  et al., 1986 a  1990 : Topografická mineralógia Slovenska, diel  1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
    Ukraine
     
    

    • Crimea Oblast'
    

      • Crimea peninsula
    

        • Balaklava area
    
    		Dobrovolskaya T.I., Polkanov Y.A. The Paleovolcano Fiolent. Giude (2004) - Simferopol, 2004, 19 p. (in Russ.)  Oleg V. Zinchenko at al. (2008).The mineralogy of seasonal sulfates in the cape Fiolent - Zapiski Ukrainskogo Mineralogichnogo Tovaristva (Proceeding Ukrainian Mineralogical Society), 2008, #5, p. 75-83 (in Ukr.)
    USA
     
    

    • Arizona
    
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 380; Wenrich, K.J. & H.B. Sutphin (1988), Recognition of breccia pipes in northern Arizona, AZ Bur. Geol. Min. Tech. Fieldnotes: 18: 1-5, II.
    


      • Pinal Co.
    

        • San Manuel District
    

          • San Manuel
    

            • San Manuel Mine (Apex Lead & Vanadium Mining Corp Mine; Quarelli group)
    
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 251, 264, 380; Anthony, J.W. & W.J. McLean (1976), Jurbanite, a new post-mining aluminum sulfate mineral from San Manuel, AZ, Am.Min.: 61: 1-4.
    

    • California
    

      • Del Norte Co.
    

        • Low Divide District
    
    		No reference listed
    



California Geology: 48 (5): 119
    

    • Colorado
    

      • Fremont Co.
    

        • Canon City District
    

          • Canon City
    
    		Minerals of Colorado (1997) Eckels, E. B.
    


      • Garfield Co.
    
    		Minerals of Colorado (1997) Eckels, E. B.
    


      • Mesa Co.
    
    		Minerals of Colorado (1997) Eckel, E. B.
    


      • Moffat Co.
    

        • Piceance Basin
    
    		Minerals of Colorado (1997) E.B. Eckels
    


      • Montezuma Co.
    

        • Mesa Verde National Park
    
    		Minerals of Colorado (1997) E.B. Eckels
    


      • Rio Blanco Co.
    
    		Minerals of Colorado (1997) Eckels, E. B.
    

    • Michigan
    

      • Marquette Co.
    

        • Marquette iron range
    

          • Ishpeming
    
    		Mineralogy of Michigan (2004) Heinrich & Robinson
    

    • Missouri
    

      • Jasper Co.
    
    		Rocks & Min., March 1998.
    


      • Madison Co.
    
    		Grawe (1956); Min.Rec.:6:144 (1975); Acta Cryst.:17:863 (1964).; Am Min 41:662
    

    • Nevada
    

      • Eureka Co.
    

        • Lynn District
    
    		NBMG Spec. Pub. 31 Minerals of Nevada
    

    • New Jersey
    

      • Sussex Co.
    

        • Franklin Mining District
    

          • Ogdensburg
    

            • Sterling Hill
    
    		Dunn(1995):Pt5:639.
    

    • Tennessee
    

      • Sevier Co.
    

        • Great Smoky Mts
    

    

    • Virginia
    
    		Minerals of Virginia 1990 by R. V. Dietrich
    

Minerals of Virginia 1990 by R. V. Dietrich
    

Minerals of Virginia 1990 by R. V. Dietrich
    


      • Rockbridge Co.
    

        • Glasgow
    
    		Rocks & Min.: 60:157.
    

Minerals of Virginia 1990 by R. V. Dietrich
    


      • Wise Co.
    

        • East Stone Gap
    
    		Minerals of Virginia, 1990 by R. V. Dietrich
    

    


    

    Mineral
 and/or
Locality

    

    
 
    
 
 Google
 
 
 
 
 
 
 
    
 
    

  
 
 
    
 
    
 
 
 www.mindat.org
 
 
 
 Web
 
 
    
 
    
 

 
 
 
 
 

    Copyright © Jolyon Ralph and Ida Chau 1993-2009.  Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the 
  Site hosted & developed by Jolyon Ralph.  
Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of
hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here
to register. Current server date and time: 21st Nov 2009 04:23:23