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Schwertmannite Mineral Data + |
General Schwertmannite Information |
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| Fe+++16O16(OH)12(SO4)2 | |||
| Molecular Weight = 1,545.76 gm | |||
| Iron 57.81 % Fe 82.65 % Fe2O3 | |||
| Hydrogen 0.78 % H 6.99 % H2O | |||
| Sulfur 4.15 % S 10.36 % SO3 | |||
| Oxygen 37.26 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Fe3+16O16(OH)12(SO4)2 | |||
| As a secondary precipitate forming crusts on material inundated by acidic (pH 3.2) drainage water. | |||
| Approved IMA 1994 | |||
| Pyhasalmi sulfide mine, Province or Oulu, Finland. Link to MinDat.org Location Data. | |||
| In honor of Udo Schwertmann (1922 - ). | |||
| IMA1990-006 | |||
Search for Schwertmannite Images | |||
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Schwertmannite Crystallography |
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| a:c = 1:0.5666 | |||
| a = 10.66, c = 6.04, Z = 1; V = 686.36 Den(Calc)= 3.74 | |||
| Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: P 4/m | |||
| By Intensity(I/Io): 2.55(1), 3.39(0.46), 4.86(0.37), | |||
Physical Properties of Schwertmannite |
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| Brownish yellow. | |||
| 3.77 - 3.99, Average = 3.88 | |||
| Opaque | |||
| Unknown - Minerals too small to observe fractures. | |||
| Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite). | |||
| Encrustations - Forms crust-like aggregates on matrix. | |||
| 2.5-3.5 - Finger Nail-Copper Penny | |||
| Non-fluorescent. | |||
| Earthy (Dull) | |||
| brownish yellow | |||
Optical Properties of Schwertmannite |
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| NCalc= 2.13 - from Gladstone-Dale relationship (KC = 0.3025) where Ncalc=Dcalc*KC+1 NCalc= 2.17 - from Gladstone-Dale relationship (KC = 0.3025) where Ncalc=Dmeas*KC+1 |
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Calculated Properties of Schwertmannite |
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relectron=3.62 gm/cc |
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| Fermion Index = 0.01274 Boson Index = 0.98726 |
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PESchwertmannite = 17.66 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Schwertmannite is Not Radioactive |
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Schwertmannite Classification |
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| 6.4.10.1 (6)Hydroxides and Oxides Containing Hydroxyl | |||
| (6.4)containing multiple cations | |||
| (6.4.10)Dana Group | |||
| VI/B.04-30 VI - Sulfates,Chromates,Molybdates and Tungstates | |||
| VI/B - Waterfree sulfates [SO4]2- with unfamiliar anions. cations of medium size | |||
| VI/B.04 - D`ansite - Schwerdtmannite series | |||
Other Schwertmannite Information |
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| NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.80,p847,1995) | |||
| Links to other databases for Schwertmannite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas Search for Schwertmannite using: Visit our Advertisers for Schwertmannite : Translate Schwertmannite Mineral Data : Ask about Schwertmannite here : Print or Cut-and-Paste your Schwertmannite Specimen Label here :
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