Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Mineral Chatroom The Mindat Store

Straczekite

This page is currently not sponsored. Click here to sponsor this page.
Big Photo

Union Carbide Mine, Wilson Springs (Potash Sulfur Springs), Garland Co., Arkansas, USA
© Thomas Witzke

Show Straczekite Photos (14)



Formula:
(Ca,K,Ba)(V
5+
 
,V
4+
 
)
 
8
O
 
20
 · 3H
 
2
O
System:MonoclinicColour:Green-black
Hardness:1 - 2
Member of:Straczekite Group
Name:Named after John A. Straczek, chief geologist, Union Carbide Corporation.
This page provides mineralogical data about Straczekite.

Classification of Straczekite

IMA status:Approved 1983
Strunz 8th edition ID:4/G.11-30
Nickel-Strunz 10th (pending) edition ID:4.HE.20

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
E : Phyllovanadates
Dana 8th edition ID:47.3.2.1

47 : VANADIUM OXYSALTS
3 : Hydrated Normal Vanadium Oxysalts
Hey's CIM Ref.:21.2.15

21 : Vanadates (and vanadates with arsenate or phosphate)
2 : Vanadates of Mg, Ca, Sr or Ba
mindat.org URL:http://www.mindat.org/min-3796.html
Please feel free to link to this page.

Type Occurrence of Straczekite

Type Locality:North Wilson pit, Union Carbide Mine, Wilson Springs (Potash Sulfur Springs), Garland Co., Arkansas, USA
Year of Discovery:1984

Physical Properties of Straczekite

Lustre:Greasy
Colour:Green-black
Hardness (Mohs):1 - 2

Crystallography of Straczekite

Crystal System:Monoclinic
Cell Parameters:a = 11.67Å, b = 3.66Å, c = 10.63Å
β = 100.53°
Ratio:a:b:c = 3.189 : 1 : 2.904
Unit Cell Volume:V 446.38 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
10.449 (50)
3.486 (100)
3.255 (10)
2.492 (10)
1.9437 (15)
1.8306 (50)
1.8030 (10)

Optical Data of Straczekite

Type:Biaxial (-)
RI values: nα = 2.000
Maximum Birefringence:δ = 2.000

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:relatively weak

Chemical Properties of Straczekite

Formula:
(Ca,K,Ba)(V
5+
 
,V
4+
 
)
 
8
O
 
20
 · 3H
 
2
O
Essential elements:Ca, H, O, V
All elements listed in formula:Ba, Ca, H, K, O, V

Relationship of Straczekite to other Species

Member of:Straczekite Group
Other Members of Group:

- +
Bariandite
Al
 
0.6
(V
5+
 
,V
4+
 
)
 
8
O
 
20
 · 9H
 
2
O
Bokite
(Al,Fe
3+
 
)
 
1.3
(V
5+
 
,V
4+
 
,Fe
3+
 
)
 
8
O
 
20
 · 7.4H
 
2
O
Corvusite
(Na,K,Ca,Mg)
 
2
(V
5+
 
,V
4+
 
,Fe
2+
 
)
 
8
O
 
20
 · 6-10H
 
2
O
Fernandinite
(Ca,K)(V
5+
 
,V
4+
 
,Fe
2+
 
)
 
8
O
 
20
 · 10H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
4.HE.05Melanovanadite
Ca
 
2
(V
5+
 
,V
4+
 
)
 
4
O
 
10
 · 5H
 
2
O
4.HE.10Shcherbinaite
V
5+
2
O
 
5
4.HE.15Hewettite
CaV
 
6
O
 
16
 · 9H
 
2
O
4.HE.15Metahewettite
CaV
 
6
O
 
16
 · 3H
 
2
O
4.HE.20Bariandite
Al
 
0.6
(V
5+
 
,V
4+
 
)
 
8
O
 
20
 · 9H
 
2
O
4.HE.20Bokite
(Al,Fe
3+
 
)
 
1.3
(V
5+
 
,V
4+
 
,Fe
3+
 
)
 
8
O
 
20
 · 7.4H
 
2
O
4.HE.20Corvusite
(Na,K,Ca,Mg)
 
2
(V
5+
 
,V
4+
 
,Fe
2+
 
)
 
8
O
 
20
 · 6-10H
 
2
O
4.HE.20Fernandinite
(Ca,K)(V
5+
 
,V
4+
 
,Fe
2+
 
)
 
8
O
 
20
 · 10H
 
2
O
4.HE.25Häggite
V
3+
 
V
4+
 
O
 
2
(OH)
 
3
4.HE.30Doloresite
V
4+
3
O
 
4
(OH)
 
4
4.HE.35Duttonite
V
4+
 
O(OH)
 
2
4.HE.40Cavoite
CaV
4+
3
O
 
7
Related Minerals - Hey's Index Grouping:

- +
21.2.1Metarossite
Ca(V
 
2
O
 
6
) · 2H
 
2
O
21.2.2Rossite
Ca(V
 
2
O
 
6
) · 4H
 
2
O
21.2.3Metahewettite
CaV
 
6
O
 
16
 · 3H
 
2
O
21.2.4Hewettite
CaV
 
6
O
 
16
 · 9H
 
2
O
21.2.5Pintadoite
Ca
 
2
(V
 
2
O
 
7
) · 9H
 
2
O
21.2.6Hendersonite
(Ca,Sr)
 
1.3
V
 
6
O
 
16
 · 6H
 
2
O
21.2.7Fernandinite
(Ca,K)(V
5+
 
,V
4+
 
,Fe
2+
 
)
 
8
O
 
20
 · 10H
 
2
O
21.2.8Pascoite
Ca
 
3
(V
 
10
O
 
28
) · 17H
 
2
O
21.2.9Sherwoodite
Ca
 
4.5
(AlV
4+
2
V
5+
12
O
 
40
) · 28H
 
2
O
21.2.10Melanovanadite
Ca
 
2
(V
5+
 
,V
4+
 
)
 
4
O
 
10
 · 5H
 
2
O
21.2.11Grantsite
(Na,Ca)V
 
6
O
 
16
 · 4H
 
2
O
21.2.12Hummerite
K
 
2
Mg
 
2
(V
 
10
O
 
28
) · 16H
 
2
O
21.2.13Metadelrioite
CaSr(V
 
2
O
 
6
)(OH)
 
2
21.2.14Delrioite
CaSr(V
 
2
O
 
6
)(OH)
 
2
 · 3H
 
2
O
21.2.16Gamagarite
Ba
 
2
(Fe
3+
 
,Mn
3+
 
)(VO
 
4
)
 
2
(OH)

Other Names for Straczekite

Synonyms:
IMA1983-028
Other Languages:
German:Straczekit
Spanish:Straczekita

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 Straczekite

Reference List:

- +
Evans, Jr., H.T., Nord, G., Marinenko, J. and Milton, C. (1984) Straczekite, a new calcium barium potassium vanadate mineral from Wilson Springs, Arkansas. Mineralogical Magazine 48, 289-293.

American Mineralogist (1985) 70: 877.

Evans, Jr., H.T., and Hughes, J.M. (1990) Crystal chemistry of the natural vanadium bronzes. American Mineralogist 75, 508-521.

Internet Links for Straczekite

Search Engines:
  • Look for Straczekite on Google
  • Look for Straczekite images on Google
    • External Links:
  • Look for Straczekite on Webmineral
  • Look for Straczekite on Athena Mineralogy[Link Broken?]
  • Look for Straczekite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Straczekite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Find Straczekite on www.crystalclassics.co.uk
  • Wilensky Fine Minerals
  • Buy RARE Minerals from Rocks of Africa
  • The Arkenstone - Fine Minerals
  • Buy fine minerals and gemstones from Pala International
  • Edwards Minerals - Fine Specimens
  • Fine Minerals from Weinrich Minerals, Inc.
  • Search for Straczekite from all mineral dealers at minfind.com
  • SpiriferMinerals.com - high quality low prices
  • Buy from David K Joyce minerals
  • By minerals from YourMineralCollection
    • Jobs:
  • Mining & Geology Jobs

    • Localities for Straczekite

    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.
    Hide Locality List
    (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.
    Germany
     
    • Thuringia
      • Gera
        • Ronneburg U deposit
    		T. Witzke et al. (2001) American Mineralogist 86, 1081-1086
    USA
     
    • Arizona
      • Apache Co.
        • Navajo Indian Reservation
          • Monument Valley
            • Monument No. 2 channel
    		Evans, H. and J. Hughes (1990) Crystal chemistry of the natural vanadium bronzes. American Mineralogist: 75: 508-521; Grant, Raymond W., Bideaux, R.A., and Williams, S.A. (2006) Minerals Added to the Arizona List 1995-2005: 8.
    • Arkansas
      • Garland Co.
        • Wilson Springs (Potash Sulfur Springs)
          • Union Carbide Mine
    		R&M 70:3 pp 154-170; Mineralogical Magazine 1984 48 : 289-293
    • Utah
      • San Juan Co.
        • Paradox Valley
          • Paradox Valley District
    Mineral and/or Locality
    Search Google
     
    Copyright © Jolyon Ralph and Ida Chau 1993-2012. 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. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
    Current server date and time: 30th Jan 2012 14:07:58
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds