Jedwabite
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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.
Classification of Jedwabite
Approved
1/A.08-50
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
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
E : Iron-chromium family
1.1.34.1
1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
Pronounciation of Jedwabite
Pronounciation:
Play | Recorded by | Country |
---|---|---|
Jolyon Ralph | United Kingdom |
Physical Properties of Jedwabite
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 Jedwabite
Formula:
Fe7(Ta,Nb)3
IMA Formula:
Fe7Ta3
Elements listed:
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 V:
157.69 ų (Calculated from Unit Cell)
Z:
1
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.19 Å | (70) |
2.05 Å | (100) |
2.01 Å | (60) |
1.347 Å | (80) |
1.059 Å | (50) |
Type Occurrence of Jedwabite
Place of Conservation of Type Material:
Fersman Mineralogical Museum, Moscow
VGM-Moscow
VGM-Moscow
Synonyms of Jedwabite
Other Language Names for Jedwabite
Related Minerals - Nickel-Strunz Grouping
1.AE. | Vanadium | V | Iso. m3m (4/m 3 2/m) : Im3m |
1.AE.05 | Molybdenum | Mo | Iso. |
1.AE.05 | Chromium | Cr | Iso. m3m (4/m 3 2/m) : Im3m |
1.AE.05 | Iron | Fe | Iso. m3m (4/m 3 2/m) : Im3m |
1.AE.05 | Kamacite | (Fe,Ni) | Iso. |
1.AE.05 | Tungsten | W | Iso. |
1.AE.05 | UM2001-06-E:CrFeNi | Fe7Cr2Ni | |
1.AE.10 | Taenite | (Fe,Ni) | Iso. m3m (4/m 3 2/m) : Fm3m |
1.AE.10 | Tetrataenite | FeNi | Tet. |
1.AE.10 | Antitaenite | Fe3Ni | |
1.AE.15 | Chromferide | Fe3Cr1-x (x=0.6) | Iso. m3m (4/m 3 2/m) : Pm3m |
1.AE.15 | Ferchromide | Cr3Fe1-x | Iso. m3m (4/m 3 2/m) : Pm3m |
1.AE.15 | Wairauite | CoFe | Iso. |
1.AE.20 | Awaruite | Ni3Fe | Iso. m3m (4/m 3 2/m) : Fm3m |
1.AE.30 | Manganese | Mn | Iso. 4 3m : I4 3m |
Other Information
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 Jedwabite
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 Jedwabite
mindat.org URL:
https://www.mindat.org/min-7120.html
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Localities for Jedwabite
Locality List




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