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Picropharmacolite Mineral Data + |
General Picropharmacolite Information |
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| Ca4Mg(AsO3OH)2(AsO4)2·11(H2O) | |||
| Molecular Weight = 940.48 gm | |||
| Calcium 17.05 % Ca 23.85 % CaO | |||
| Magnesium 2.58 % Mg 4.29 % MgO | |||
| Arsenic 31.87 % As 48.88 % As2O5 | |||
| Hydrogen 2.57 % H 22.99 % H2O | |||
| Oxygen 45.93 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Ca4Mg(AsO3OH)2(AsO4)2·11(H2O) | |||
| Secondary mineral formed in the oxidation zone of arsenic ore deposits. | |||
| Valid Species (Pre-IMA) 1819 | |||
| Riechelsdorf, Hessen, Germany. Link to MinDat.org Location Data. | |||
| Named for its magnesia content and the similarity to pharmacolite. | |||
| ICSD 100730 | |||
| PDF 14-222 | |||
Picropharmacolite Image | |||
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Picropharmacolite Crystallography |
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| a:b:c =1.0034:1:0.497 | |||
| a = 13.547, b = 13.5, c = 6.71, Z = 2; alpha = 99.85°, beta = 96.41°, gamma = 91.6° V = 1,201.04 Den(Calc)= 2.60 | |||
| Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1 | |||
| By Intensity(I/Io): 13.5(1), 3.18(0.8), 9.2(0.6), | |||
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Physical Properties of Picropharmacolite |
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| [100] Perfect, [010] Perfect | |||
| Colorless, Silky white. | |||
| 2.58 | |||
| Transparent to Translucent | |||
| Botryoidal - "Grape-like" rounded forms (e.g.. malachite). | |||
| Fibrous - Crystals made up of fibers. | |||
| Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) | |||
| 1-2 - Between Talc and Gypsum | |||
| Non-fluorescent. | |||
| Pearly | |||
| Nonmagnetic | |||
| white | |||
Optical Properties of Picropharmacolite |
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| CI meas= -0.138 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.13 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.244,KPDmeas= 0.2459,KC= 0.216 |
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| Biaxial (?), a=1.631, b=1.632, g=1.64, bire=0.0090, 2V(Calc)=40, 2V(Meas)=40. Dispersion r < v strong. | |||
Calculated Properties of Picropharmacolite |
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relectron=2.57 gm/cc |
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| Fermion Index = 0.00303 Boson Index = 0.99697 |
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PEPicropharmacolite = 23.17 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Picropharmacolite is Not Radioactive |
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Picropharmacolite Classification |
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| 39.2.4.1 (39)Hydrated Acid Phosphates, etc | |||
| (39.2)H2 (AB)5 (XO4)4 · x(H2O) | |||
| (39.2.4)Dana Group | |||
| VII/C.24-90 VII - Phosphates, Arsenates and Vanadates | |||
| VII/C - Water-bearing phosphates without unfamiliar anions, cations of medium and big size: Fe, Mn, Zn, Mg and Ca, (NH4)1+ | |||
| VII/C.24 - Haidingerite - Picropharmacolite series | |||
Other Picropharmacolite Information |
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| NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) | |||
| Links to other databases for Picropharmacolite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 - Franklin Minerals(Dunn) 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 - WWW-MINCRYST 14 -École des Mines de Paris Search for Picropharmacolite using: Visit our Advertisers for Picropharmacolite : Translate Picropharmacolite Mineral Data : Ask about Picropharmacolite here : Print or Cut-and-Paste your Picropharmacolite Specimen Label here :
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