[Content and History] [Recent Issues] [Back Issues] [Subscriptions] [Contacts] See Also: [Diamond Crystals] [Excalibur Minerals] [Hudson Institute] [Minerals on CDROM] Mineral News was founded some twenty years ago and has developed a following of avid mineral collectors seeking timely information about new finds and other items of interest to the collector community. Articles are solicited from collector and scientific authors. General Edgarite InformationFeNb2S6 |
Molecular Weight = 434.06 gm |
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Niobium 42.81 % Nb |
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Iron 12.87 % Fe |
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Sulfur 44.33 % S |
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100.00 % |
Fe2+Nb2S6 |
Coexists with Ti-enriched pyrrhotite in a fenitized xenolith in nepheline syenite. |
Approved IMA 1995 (Dana # Added) |
Kola Peninsula, northwestern Russia. Link to MinDat.org Location Data. |
Named after Alan D. Edgar (1935-1998), Professor of Petrology, University of Western Ontario, London, Ontario, Canada, in recognition of his contributions to the study of alkaline r ocks and synthetic equivalents. |
ICSD 53507 |
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IMA1995-017 |
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PDF 22-350 |
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Edgarite Crystallographya:c = 1:2.11228 |
a = 5.771, c = 12.19, Z = 2; V = 351.59 Den(Calc)= 4.10 |
Hexagonal - TrapezohedralH-M Symbol (6 2 2) Space Group: P 6322 |
By Intensity(I/Io): 2.096(1)(114), 1.665(0.8)(300), 6.11(0.8)(002),2.606(0.8)(112), 1.126(0.7)(322), 1.027(0.6)(414), 1.524(0.6)(008), 3.04(0.6)(004), |
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Mouse
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| Physical Properties of Edgarite{0001} Perfect |
Dark gray, Black. |
Opaque |
Platy - Sheet forms (e.g. micas). |
2-2.5 - Gypsum-Finger Nail |
Metallic |
| Optical Properties of EdgariteStrong, from almost white to dark brown. |
Distinct. |
Similar to molybdenite. |
Distinct, from gray to light gray with a bluish tint. |
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| Calculated Properties of EdgariteBulk Density (Electron Density)=3.85 gm/cc |
note: Specific Gravity of Edgarite =4.10 gm/cc. Fermion Index = 0.0060520482 |
Boson Index = 0.9939479518 PEEdgarite = 70.79 barns/electron |
U=PEEdgarite x rElectron Density= 272.81 barns/cc. GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Edgarite is Not Radioactive | Edgarite Classification02.11.13.01 (02)Sulfides - Including Selenides and Tellurides |
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(02.11)where Am Bn Xp, with (m+n):p=2:3 |
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(02.11.13)Dana Group |
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02.DB.25 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.D - Metal Sulfides, M:S = 3:4 and 2:3 |
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02.DB -M:S = 2:3 and similar |
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| Other Edgarite InformationNAME( CanMin, 8/99) PHYS. PROP.(AmMin, Vol 85, p. 1843) OPTIC PROP.(AmMin, Vol 85, p. 1843) |
Links to other databases for Edgarite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - Google Images 4 - Google Scholar 5 - Handbook of Mineralogy (MinSocAm) 6 - Handbook of Mineralogy (UofA) 7 - MinDAT 8 - MinMax(Deutsch) 9 - MinMax(English) 10 - Mineralienatlas (Deutsch) 11 - QUT Mineral Atlas 12 - Ruff.Info Search for Edgarite using: Visit our Advertisers for Edgarite : AA Mineral SpecimensB & L Fine Minerals Crystalarium.com Dan Weinrich Fine Minerals Dan Weinrich Auctions Dakota Matrix Desert Winds Gems and Minerals Excalibur Minerals Exceptional Minerals Fabre Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club Wrights Rock Shop Translate Edgarite Mineral Data : Ask about Edgarite here : Print or Cut-and-Paste your Edgarite Specimen Label here :
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