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Jedwabite

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Jacques Jedwab (1996)
Formula:
Fe7(Ta,Nb)3
Colour:
greyish yellow
Lustre:
Metallic
Hardness:
7
Specific Gravity:
8.91 (Calculated)
Crystal System:
Hexagonal
Name:
For Jacques Jedwab,(born Charleroi, May 7 1925) Université Libre de Bruxelles (ULB), Belgium, in recognition of his meticulous investigations of the mineralogy of placers and of carbides in natural environments.
This page provides mineralogical data about Jedwabite.


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Classification of JedwabiteHide

IMA status:
Approved
Strunz 8th ed.:
1/A.08-50
Nickel-Strunz 10th (pending) ed.:
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 ed.:
1.1.34.1

1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group

Pronounciation of JedwabiteHide

Pronounciation:
PlayRecorded byCountry
Jolyon RalphUnited Kingdom

Physical Properties of JedwabiteHide

Lustre:
Metallic
Transparency:
Opaque
Colour:
greyish yellow
Hardness:
7 on Mohs scale
Hardness:
VHN100=1100 kg/mm2 - Vickers
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
8.91 g/cm3 (Calculated)

Chemical Properties of JedwabiteHide

Formula:
Fe7(Ta,Nb)3
IMA Formula:
Fe7Ta3
Elements listed:
Fe, Ta - search for minerals with similar chemistry

Crystallography of JedwabiteHide

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 V:
157.69 ų (Calculated from Unit Cell)
Z:
1

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.19 (70)
2.05 (100)
2.01 (60)
1.347 (80)
1.059 (50)

Type Occurrence of JedwabiteHide

Type Locality:
ⓘ Avrorinskii Placer, Aktai River, Baranchinsky Massif, Nizhnii Tagil, Sverdlovsk Oblast, Russia
Place of Conservation of Type Material:
Fersman Mineralogical Museum, Moscow
VGM-Moscow

Synonyms of JedwabiteHide

Other Language Names for JedwabiteHide

Related Minerals - Nickel-Strunz GroupingHide

1.AE.VanadiumVIso. m3m (4/m 3 2/m) : Im3m
1.AE.05MolybdenumMoIso.
1.AE.05ChromiumCrIso. m3m (4/m 3 2/m) : Im3m
1.AE.05IronFeIso. m3m (4/m 3 2/m) : Im3m
1.AE.05Kamacite(Fe,Ni)Iso.
1.AE.05TungstenWIso.
1.AE.05UM2001-06-E:CrFeNiFe7Cr2Ni
1.AE.10Taenite(Fe,Ni)Iso. m3m (4/m 3 2/m) : Fm3m
1.AE.10TetrataeniteFeNiTet.
1.AE.10AntitaeniteFe3Ni
1.AE.15ChromferideFe3Cr1-x (x=0.6)Iso. m3m (4/m 3 2/m) : Pm3m
1.AE.15FerchromideCr3Fe1-xIso. m3m (4/m 3 2/m) : Pm3m
1.AE.15WairauiteCoFe
1.AE.20AwaruiteNi3FeIso. m3m (4/m 3 2/m) : Fm3m
1.AE.30ManganeseMnIso. 4 3m : I4 3m

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for JedwabiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mineralogical Record: 29: 472.
Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (1997): 126(2): 100-104.[Am. Min. 83: 654(1998)(abstract)]

Internet Links for JedwabiteHide

Localities for JedwabiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia (TL)
 
  • Sverdlovsk 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.)
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