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Ernstite Mineral Data + |
General Ernstite Information |
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| (Mn++1-xFe+++x)Al(PO4)(OH)2-xOx | |||
| Molecular Weight = 210.86 gm | |||
| Manganese 13.03 % Mn 16.82 % MnO | |||
| Aluminum 12.80 % Al 24.18 % Al2O3 | |||
| Iron 13.24 % Fe 18.93 % Fe2O3 | |||
| Phosphorus 14.69 % P 33.66 % P2O5 | |||
| Hydrogen 0.72 % H 6.41 % H2O | |||
| Oxygen 45.53 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Mn2+0.5Fe3+0.5Al(PO4)(OH)1.5O0.5 | |||
| Oxidation product of eosphoite in granitic pegmatite. | |||
| Approved IMA 1970 | |||
| Daib-East farm, Karibib, Namibia. Link to MinDat.org Location Data. | |||
| Named for Theodor K. A. Ernst (1904-), mineralogist, University of Erlangen, Germany. | |||
Ernstite Image | |||
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Ernstite Crystallography |
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| a:b:c =1.326:1:0.6639 | |||
| a = 13.92, b = 10.497, c = 6.969, Z = 8; beta = 90.37° V = 1,018.28 Den(Calc)= 2.75 | |||
| MonoclinicSpace Group: C 2/c or Cc | |||
| By Intensity(I/Io): 2.829(1), 2.836(0.8), 2.438(0.5), | |||
Physical Properties of Ernstite |
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| [010] Good, [100] Good | |||
| Yellow brown. | |||
| 3.07 | |||
| Translucent | |||
| Aggregates - Made of numerous individual crystals or clusters. | |||
| Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) | |||
| 3-3.5 - Calcite-Copper Penny | |||
Optical Properties of Ernstite |
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| CI meas= -0.01 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.128 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2552,KPDmeas= 0.2286,KC= 0.2262 |
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| Biaxial (-), a=1.678, b=1.706, g=1.721, bire=0.0430, 2V(Calc)=70, 2V(Meas)=74. Dispersion r > v. | |||
| yellow brown. | |||
| red brown. | |||
| pale yellow. | |||
Calculated Properties of Ernstite |
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relectron=3.00 gm/cc |
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| Fermion Index = 0.00302 Boson Index = 0.99698 |
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PEErnstite = 8.34 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Ernstite is Not Radioactive |
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Ernstite Classification |
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| 42.7.1.3 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen | |||
| (42.7)where (AB)5 (XO4)3 Zq · x(H2O) | |||
| (42.7.1)Dana Group | |||
| VII/D.14-30 VII - Phosphates, Arsenates and Vanadates | |||
| VII/D - Water-bearing phosphates with unfamiliar anions, cations of medium size: Cu, Zn, Mn, Al, Fe | |||
| VII/D.14 - Childrenite - Ernstite series | |||
Other Ernstite Information |
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| NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8) | |||
| Links to other databases for Ernstite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris Search for Ernstite using: Visit our Advertisers for Ernstite : AA Mineral SpecimensB & L Fine Minerals Crystal Vaults Dan Weinrich Fine Minerals Dan Weinrich Auctions e-Rocks Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals Rockshop.cz T G Fine Minerals Wrights Rock Shop Translate Ernstite Mineral Data : Ask about Ernstite here : Print or Cut-and-Paste your Ernstite Specimen Label here :
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