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Picropharmacolite

A valid IMA mineral species - grandfathered
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ⓘOre dumps, Richelsdorf Smelter, Süß, Nentershausen, Hersfeld-Rotenburg, Kassel Region, Hesse, Germany
Usually found as small to microscopic pearly white botryoids with a radiating structure internally, also commonly as silky fibrous aggregates or small acicular crystals.


Unique Identifiers
IMA Formula:
Ca4Mg(AsO3OH)2(AsO4)2 · 11H2O
First published:
1819
Type description reference:
Stromeyer, H. (1819) Chemische Untersuchung der natürlichen Boraxsäure, des Eisenpecherzes, des Picro-Pharmacoliths und des Polyhalits, eines neuen fossilen-Salzes. Annalen der Physik: 61: 177-189 (185).

Classification of Picropharmacolite

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
H : With large and medium-sized cations, RO4:H2O< 1:1
Dana 7th ed.:
39.2.4.1
Dana 8th ed.:
39.2.4.1

39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
2 : (AB)5[HXO4]2[XO4]2.xH2O
Hey's CIM Ref.:
20.2.21

20 : Arsenates (also arsenates with phosphate, but without other anions)
2 : Arsenates of Be, Mg, Ca or Ba

Mineral Symbols
Transparency:
Transparent, Translucent
Colour:
White; colorless in transmitted light.
Streak:
White
Hardness:
1 - 2 onMohs scale
Hardness Data:
Measured
Comment:
Hardness may be higher
Tenacity:
Fragile
Cleavage:
Perfect
On {100} and {010}, perfect.
Fracture:
Fibrous, Micaceous
Density:
2.55 - 2.64 g/cm3 (Measured)    2.58 g/cm3 (Calculated)
Comment:
Measured value on Joplin, Missouri, material.

Optical Data of Picropharmacolite
Surface Relief:
Moderate
Dispersion:
r < v strong
Optical Extinction:
Z ^ c = 8°-15°, X=b
Pleochroism:
Non-pleochroic
Comments:
Earlier reports of higher refractive indices probably made erroneously on another species.

Chemistry of Picropharmacolite

Crystallography of Picropharmacolite
Geological Setting of Type Material:
Surface weathering of arsenic-bearing ores on a mineral mine dump
Reference:
Stromeyer, H. (1819) Chemische Untersuchung der natürlichen Boraxsäure, des Eisenpecherzes, des Picro-Pharmacoliths und des Polyhalits, eines neuen fossilen-Salzes. Annalen der Physik: 61: 177-189 (185).

Synonyms of Picropharmacolite

Other Language Names for Picropharmacolite

Common AssociatesOrth.mmm(2/m2/m2/m) :Imma8.CH.05WalentaiteFe3+3(P0.84As0.16O4)2(O,OH)6As3+2.56Ca0.42Na0.28Mn2+0.35Fe2+0.30O6.1(OH)0.9(H2O)0.9Orth.mmm(2/m2/m2/m) :Imma8.CH.05Halilsarpite[Mg(H2O)6][CaAs3+2(Fe3+2.67Mo6+0.33)(AsO4)2O7]Orth.mmm(2/m2/m2/m) :Imma8.CH.10AnapaiteCa2Fe2+(PO4)2 · 4H2OTric.1 :P18.CH.20Dittmarite(NH4)Mg(PO4) · H2OOrth.mm2 :Pmn218.CH.20Niahite(NH4)Mn2+(PO4) · H2OOrth.mm2 :Pmn218.CH.25TaranakiteK3Al5(PO3OH)6(PO4)2 · 18H2OTrig.3m(32/m) :R3c8.CH.25FrancoanelliteK3Al5(PO3OH)6(PO4)2 · 12H2OTrig.8.CH.25Macivorite(NH4)3Al5(PO3OH)6(PO4)2 · 18H2OTrig.3m(32/m) :R3c8.CH.30Schertelite(NH4)2MgH2(PO4)2 · 4H2OOrth.mmm(2/m2/m2/m) :Pbca8.CH.35Hannayite(NH4)2Mg3H4(PO4)4 · 8H2OTric.1 :P18.CH.40HazeniteKNaMg2(PO4)2 · 14H2OOrth.mmm(2/m2/m2/m)8.CH.40Struvite-(K)KMg(PO4) · 6H2OOrth.mm2 :Pmn218.CH.40Struvite(NH4)Mg(PO4) · 6H2OOrth.mm2 :Pmn218.CH.45Rimkorolgite(Mg,Mn)5(Ba,Sr,Ca)(PO4)4 · 8H2OOrth.8.CH.50BakhchisaraitseviteNa2Mg5(PO4)4 · 7H2OMon. 2/m :P21/b8.CH.55SmolyaninoviteCo3Fe3+2(AsO4)4 · 11H2OOrth.8.CH.55FahleiteCaZn5Fe3+2(AsO4)6 · 14H2OOrth.8.CH.60Barahonaite-(Fe)(Ca,Cu,Na,Fe3+,Al)12Fe3+2(AsO4)8(OH,Cl)x · nH2OMon. 2/m :P2/b8.CH.60Barahonaite-(Al)(Ca,Cu,Na,Fe3+,Al)12Al2(AsO4)8(OH,Cl)x · nH2OMon. 2/m :P2/b8.CH.70EpifanoviteNaCaCu5(PO4)4[AsO2(OH)2] · 7H2OMon. 2/m :P21/m8.CH.75Esdanaite-(Ce)NaMnCe(PO4)2 · 4H2OOrth. 222 :P212121

Fluorescence of Picropharmacolite

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    • References for PicropharmacoliteⓘKlippitztörl road cutsC.Auer (2013)Niedermayr et al. (1995)Nat. Hist. Mus. Vienna collectionBlass (1999)+1 other referenceNeschen (n.d.)
    Canada
     
    Maggie WilsonReiner Mielke 2012Reiner Mielke 2016Mielke (n.d.)
    Chile
     
    samples analysed by Gerhard Moehn and ...maurizio dini collection - quantitative ...
    China
     
    Zhang Baogui et al. (1996)www.smartminerals.com (2004)+1 other referenceXianxiao Xiong (1999)Zhang Zhong et al. (2007)
    Czech Republic
     
    Ondruš et al. (1989)Gramblička R. (2014)Lapis 2002 (7/8)Majzlan et al. (2021)Sejkora (1994)Tvrdý+1 other referenceHyrsl et al. (2009)Řídkošil
    France
     
    King (n.d.)Bari (1982)Wittern et al. (1997)De Bondt (n.d.)Pierre et Terre 1982Wittern+1 other referenceBari (1982)+1 other referenceThis mine worked the same vein as Gabe ...+2 other referencesWittern et al. (1997)Bari (1982)Wittern et al. (1997)+1 other referenceQueneau (n.d.)Robbins et al. (1985)Pélisson et al. (1987)Cuchet (2000)R. Pierrot
    Germany
     
    Gröbner et al. (2005)Weiß (1990)Walenta (1992)Blaß et al. (2001)Markl (1992)Erzgräber 1987 (2)Belendorff (2021)Weiß (1990)Weiß (1990)Schnorrer-Köhler (1988)Wittern (2001)Hofmann (1992)Stolze et al. (08/2020)Neschen (n.d.)Vollstädt et al. (1991)Witzke (1992)Joachim Esche collectionHajek (2010)Kleeberg et al. (1992)www.dergraul.de (2001)Massanek et al. (2005)Martin et al. (2021)+1 other referencecollection H.J. Haascollection H.J. HaasWittern (2001)Frenzel (1874)Neschen (n.d.)Witzke et al. (1998)
    Greece
     
    62+2 other referencesBlaß et al. (1998)+1 other referenceFritz Schreiber collectionRieck et al. (2022)
    India
     
    Ahmed et al. (2018)
    Iran
     
    Mohsen Mohammadi
    Italy
     
    Balestra et al. (2009)Gramaccioli et al. (1992)Campostrini et al. (2012)+1 other referenceStara et al. (1996)Stara et al. (1996)Lecca et al. (2022)
    Japan
     
    Specimens on sale at Tokyo showRyoji Tanaka collectionOHNISHI et al. (2013)+1 other reference
    Morocco
     
    Favreau et al. (2006)Favreau et al. (2006)Favreau et al. (2006)Font Philippe specimenFavreau et al. (2006)Favreau et al. (2006)Favreau et al. (2006)
    North Macedonia
     
    Rieck (1993)+1 other referenceBoev et al. (2015)Đorđević et al. (2017)+1 other reference
    Poland
     
    Siuda (2014)+1 other reference
    Russia
     
    Pekov I.V. et al. (2010)+1 other referencePekov (1998)webmineral.ru (2018)Bortnikova et al. (2017)Pekov (1998)
    Slovakia
     
    Ďuďa R. et al. (1993)Martin Števko-unpublishedMartin Števko-unpublished+1 other referenceĎuďa et al. (1996)Martin Števko-unpublished
    South Africa
     
    Reeks (1996)
    Spain
     
    Manuel Echevarria Rodriguez collection
    Switzerland
     
    Analyses by J. Desor (PXRD & EDS)Stalder et al. (1998)+1 other referenceAnsermet (2012)
    Taiwan
     
    UK
     
    Day (1999)
    USA
     
    Kampf et al. (2017)Wilson et al. (1992)Palache et al. (1951)Stolburg et al. (1985)Castor et al. (2004)Dunn (1979)+1 other referenceRocks & Min.Mineral News: 19 (12)Thorne (n.d.)
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