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

Jedwabite

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



Formula:
Fe
 
7
(Ta,Nb)
 
3
System:HexagonalColour:grayish yellow
Lustre:MetallicHardness:7
Name:For Jacques Jedwab, Université Libre de Bruxelles, Belgique, in recognition of his meticulous investigations of the mineralogy of placers and of carbides in natural environments.
This page provides mineralogical data about Jedwabite.

Classification of Jedwabite

IMA status:Approved
Strunz 8th edition ID:1/A.08-50
Nickel-Strunz 10th (pending) edition ID:1.AE.25

1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
E : Iron-chromium family
Dana 8th edition ID:1.1.34.1

1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
mindat.org URL:http://www.mindat.org/min-7120.html
Please feel free to link to this page.

Type Occurrence of Jedwabite

Type Locality:Avrorinskii Placer, Aktai River, Baranchinsky Massif, Nizhnii Tagil, Ekaterinburgskaya (Sverdlovskaya) Oblast', Middle Urals, Urals Region, Russia

Physical Properties of Jedwabite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:grayish yellow
Hardness (Mohs):7
Hardness (Vickers):VHN100=1100 kg/mm2
Cleavage:None Observed
Fracture:Irregular/Uneven
Density (calculated):8.91 g/cm3

Crystallography of Jedwabite

Crystal System:Hexagonal
Class (H-M):6mm - Dihexagonal Pyramidal
Space Group:P63mc
Cell Parameters:a = 4.81(2) Å, c = 7.87(2) Å
Ratio:a:c = 1 : 1.636
Unit Cell Volume:V 157.69 ų (Calculated from Unit Cell)
Z:1
X-Ray Powder Diffraction:
d-spacingIntensity
2.19 (70)
2.05 (100)
2.01 (60)
1.347 (80)
1.059 (50)

Chemical Properties of Jedwabite

Formula:
Fe
 
7
(Ta,Nb)
 
3
Essential elements:Fe, Ta
All elements listed in formula:Fe, Nb, Ta

Relationship of Jedwabite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
1.AE.05Molybdenum
Mo
1.AE.05Chromium
Cr
1.AE.05Iron
Fe
1.AE.05Kamacite
(Fe,Ni)
1.AE.05Tungsten
W
1.AE.05UM2001-06-E:CrFeNi
Fe
 
7
Cr
 
2
Ni
1.AE.10Taenite
(Fe,Ni)
1.AE.10Tetrataenite
FeNi
1.AE.10Antitaenite
Fe
 
3
Ni
1.AE.15Chromferide
Fe
 
3
Cr
 
1-x
 (x=0.6)
1.AE.15Ferchromide
Cr
 
1.5
Fe
 
0.5-x
1.AE.15Wairauite
CoFe
1.AE.20Awaruite
Ni
 
3
Fe
1.AE.30Manganese
Mn

Other Names for Jedwabite

Synonyms:
IMA1995-043Jedvabite
Other Languages:
German:Jedvabit
Jedwabit
Spanish:Jedvabita
Jedwabita

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 Jedwabite

Reference List:

- +
Mineralogical Record: 29: 472.

Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (1997): 126(2): 100-104.[Am. Min. 83: 654(1998)(abstract)]

Internet Links for Jedwabite

Search Engines:
  • Look for Jedwabite on Google
  • Look for Jedwabite images on Google
    • External Links:
  • Look for Jedwabite on Webmineral
  • Look for Jedwabite on Athena Mineralogy
  • Look for Jedwabite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Jedwabite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • The Arkenstone - Fine Minerals
  • Find Jedwabite on www.crystalclassics.co.uk
  • Search for Jedwabite from all mineral dealers at minfind.com
  • Top quality minerals from Kristalle of California
  • Buy fine minerals and gemstones from Pala International
  • SpiriferMinerals.com - high quality low prices
  • Visit the Pueblo Gem and Mineral show, Tucson 2012
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Fabre Minerals - search for Jedwabite specimens
  • Edwards Minerals - Fine Specimens
  • Buy RARE Minerals from Rocks of Africa
  • High-end worldwide specimens & outstanding customer service
    • Jobs:
  • Mining & Geology Jobs

    • Localities for Jedwabite

    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.
    Russia
     
    • Urals Region
      • Middle Urals
        • Ekaterinburgskaya (Sverdlovskaya) Oblast'
          • Nizhnii Tagil
            • Baranchinsky Massif
              • Aktai River
    		Novgorodova M.I., Generalov M.E., Trubkin N.V. (1997) Jedwabite, Fe7(Ta,Nb)3, a new mineral in paragenesis with carbides of tantalum and niobium from platinum-bearing placers, - ZVMO, 126(2), pp. 100-104 (in Rus.)
    Mineral and/or Locality
    Search Google
     
    Copyright © Jolyon Ralph and Ida Chau 1993-2011. 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: 18th Jun 2011 14:33:11
    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