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Picropharmacolite

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Formula:
Ca4Mg(AsO4)2(HAsO4)2 · 11H2O
System:
Triclinic
Colour:
White; colorless in ...
Hardness:
1 - 2
Name:
Named by Friedrich Stromeyer in 1819 from the Greek πικροζ = bitter in allusion to its composition, containing magnesia, and φάρμακον ("pharmakon"), a substance with potent properties (a poison, but may also mean a drug or medicine; cf. pharmacy, pharmaceutical etc.) Picropharmacolite is not structurally related to pharmacolite despite its name as well as the chemical and physical similarity.
Usually found as small to microscopic pearly white botryoids with a radiating structure internally, also commonly as silky fibrous aggregates or small acicular crystals.

Classification of Picropharmacolite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
8.CH.15

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
39.2.4.1

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

20 : Arsenates (also arsenates with phosphate, but without other anions)
2 : Arsenates of Be, Mg, Ca or Ba
mindat.org URL:
http://www.mindat.org/min-3207.html
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Type Occurrence of Picropharmacolite

Year of Discovery:
1819
Geological Setting of Type Material:
Surface weathering of arsenic-bearing ores on a mineral mine dump

Occurrences of Picropharmacolite

Geological Setting:
A secondary mineral found in the oxidized zones of metal ore deposits rich in arsenic; usually post-mine.

Physical Properties of Picropharmacolite

Sub-Vitreous, Silky, Pearly
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
White; colorless in transmitted light.
Streak:
White
Hardness (Mohs):
1 - 2
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.

Crystallography of Picropharmacolite

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Space Group Setting:
P1
Cell Parameters:
a = 13.547Å, b = 13.500Å, c = 6.710Å
α = 99.85°, β = 96.41°, γ = 91.60°
Ratio:
a:b:c = 1.003 : 1 : 0.497
Z:
2
Morphology:
Crystals are most commonly acicular and in radial to divergent clusters, rarely as rectangular prisms elongated on [001]; more typically open spherical clusters to botryoidal with a radiating foliated internal structure, or as fibrous aggregates.
Twinning:
None reported.
Comment:
Am Min (1981) 66:385 structure.
X-Ray Powder Diffraction Data:
d-spacingIntensity
13.50(100)
9.20(60)
4.84(40)
4.44(40)
3.78(60)
3.18(80)
3.066(70)
2.92(50)
Comments:
ICDD 14-222

Optical Data of Picropharmacolite

Type:
Biaxial (+)
RI values:
nα = 1.556 - 1.566 nβ = 1.566 - 1.571 nγ = 1.577 - 1.585
2V:
Measured: 50°
Birefringence:
0.020
Max Birefringence:
δ = 0.021
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Low
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.

Chemical Properties of Picropharmacolite

Formula:
Ca4Mg(AsO4)2(HAsO4)2 · 11H2O
Essential elements:
All elements listed in formula:

Relationship of Picropharmacolite to other Species

8.CH.05WalentaiteH(Ca,Mn2+,Fe2+)Fe33+(AsO4,PO4)4 · 7H2O
8.CH.10AnapaiteCa2Fe2+(PO4)2 · 4H2O
8.CH.20Dittmarite(NH4)Mg(PO4) · H2O
8.CH.20Niahite(NH4)(Mn2+,Mg)(PO4) · H2O
8.CH.25FrancoanelliteK3Al5(PO4)2(HPO4)3 · 12H2O
8.CH.25Taranakite(K,NH4)Al3(PO4)3(OH) · 9H2O
8.CH.30Schertelite(NH4)2MgH2(PO4)2 · 4H2O
8.CH.35Hannayite(NH4)2Mg3H4(PO4)4 · 8H2O
8.CH.40Struvite(NH4)Mg(PO4) · 6H2O
8.CH.40Struvite-(K)KMg(PO4)·6H2O
8.CH.40HazeniteKNaMg2(PO4)2 · 14H2O
8.CH.45Rimkorolgite(Mg,Mn)5(Ba,Sr,Ca)(PO4)4 · 8H2O
8.CH.50BakhchisaraitseviteNa2Mg5(PO4)4 · 7H2O
8.CH.55FahleiteZn5CaFe2(AsO4)6 · 14H2O
8.CH.55Smolyaninovite(Co,Ni,Mg,Ca)3(Fe3+,Al)2(AsO4)4 · 11H2O
8.CH.60Barahonaite-(Al)(Ca,Cu,Na,Fe3+,Al)12Al2(AsO4)8(OH,Cl)x · nH2O
8.CH.60Barahonaite-(Fe)(Ca,Cu,Na,Fe3+,Al)12Fe23+(AsO4)8(OH,Cl)x · nH2O
20.2.1BearsiteBe2(AsO4)(OH) · 4H2O
20.2.2BrassiteMg(HAsO4) · 4H2O
20.2.3RössleriteMg(HAsO4) · 7H2O
20.2.4HörnesiteMg3(AsO4)2 · 8H2O
20.2.5WeiliteCa(HAsO4)
20.2.6JohnbaumiteCa5(AsO4)3OH
20.2.7HaidingeriteCaHAsO4 · H2O
20.2.8PharmacoliteCa(HAsO4) · 2H2O
20.2.9SainfelditeCaCa2Ca2(AsO4)2(HAsO4)2 · 4H2O
20.2.10VladimiriteCa4(AsO4)2(AsO3OH) · 4H2O
20.2.11GuériniteCa5(AsO4)2(HAsO4)2 · 9H2O
20.2.12FerrarisiteCa5(AsO4)2(HAsO4)2 · 9H2O
20.2.13RauenthaliteCa3(AsO4)2 · 10H2O
20.2.14PhaunouxiteCa3(AsO4)2 · 11H2O
20.2.15McneariteNaCa5(AsO4)(HAsO4)4 · 4H2O
20.2.16BergslagiteCaBeAsO4(OH)
20.2.17AdeliteCaMg(AsO4)(OH)
20.2.18TalmessiteCa2Mg(AsO4)2 · 2H2O
20.2.19IrhtemiteCa4Mg(AsO4)2(HAsO4)2 · 4H2O
20.2.20CamgasiteCaMg(AsO4)(OH) · 5H2O
20.2.22BariopharmacosideriteBa0.5Fe43+(AsO4)3(OH)4 · 5H2O

Other Names for Picropharmacolite

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Picropharmacolite

Reference List:
Stromeyer (1819) Annalen der Physik, Halle, Leipzig: 61: 185.

Frenzel (1873) Jb. Min.: 786.

Genth (1890) American Journal of Science: 40: 204.

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 120.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 740-741.

Bulletin Mineralogie (1961): 84:391.

Bulletin Mineralogie (1964): 87:169.

American Mineralogist (1976): 61:326.

American Mineralogist (1981): 66: 385-391, structure.

Gaines, Richard V., H. Catherine, W. Skinner, Eugene E. Foord, Brian Mason, Abraham Rosenzweig, and Vandall T. King (1997), Dana's New Mineralogy : The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana: 741.

Internet Links for Picropharmacolite

Specimens:
The following Picropharmacolite specimens are currently listed for sale on minfind.com.

Localities for Picropharmacolite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Austria
 
  • Carinthia
    • Friesach - Hüttenberg area
      • Hüttenberg
        • Lölling
          • Stelzing
C.Auer (2013)
G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
Nat. Hist. Mus. Vienna collection
  • Styria
    • Birkfeld
      • Gasen
peter neschen collection
Canada
 
  • British Columbia
    • Kamloops Mining Division
      • Savona
Maggie Wilson
  • Ontario
    • Timiskaming District
      • Cobalt-Gowganda region
        • Cobalt area
          • Coleman Township
Reiner Mielke 2012
            • Nipissing Mine
Reiner Mielke
Chile
 
  • Atacama Region
    • Copiapó Province
      • Tierra Amarilla
        • Pampa Larga district
maurizio dini collection - quantitative analysis
China
 
  • Guizhou Province
    • Qianxi'nan Autonomous Prefecture
      • Xingren Co.
Zhang Baogui et al. (1996): Geochemistry of thallium in the gold ore belt, Guizhou Province, southwestern China. In: Tu Guangzhi (ed.): Low-Temperature Geochemistry. Science Press (Beijing), pp. 8-14.
  • Hunan Province
    • Changde Prefecture
      • Shimen Co.
        • Shimen As-(Au) deposit (Huangchang As-(Au) deposit)
http://www.smartminerals.com/cina2004/art_hunan.htm
  • Yunnan Province
    • Chuxiong Autonomous Prefecture
      • Nanhua Co.
Xianxiao Xiong (1999): Geology of Chemical Minerals 21(2), 76-80
Zhang Zhong, Zhang Baogui, Hu Jing, Yao Linbo, and Tian Yifu (2007): Science in China, Series D (Earth Sciences), 50(3), 359-370.
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Central Bohemia Region
      • Příbram
        • Háje
Ondruš, P. & Hyršl, J. (1989): New finds and revision of secondary minerals from Příbram district. Acta Universitatis Carolinae, Geologica 1989, 521-533.
    • Karlovy Vary Region
      • Krušné Hory Mts (Erzgebirge)
        • Jáchymov District (St Joachimsthal)
Gramblička R. (2014): Minerály rudních žil s fluoritem z Božího Daru a možnosti jejich sběru. - Minerál (České Budějovice), XXII, 5, 448-451
Lapis 2002(7/8), 63-65
    • Plzeň Region
      • Planá u Mariánských Lázní (Plan)
Tvrdý, J., Řídkošil, T.: Sekundární minerály z lokality Svatá Anna v Plané u Mariánských Lázní. Časopis pro mineralogii a geologii, 1983, roč. 28, č. 3, s. 316.; http://www.mineralos.cz/lokality/plana/plana.htm
    • Ústí Region
      • Krušné Hory Mts (Erzgebirge)
        • Klášterec nad Ohří
No reference listed
- Hyrsl, J. & Korbel, P. (2009): Tschechien & Slowakei, Mineralien und Fundstellen. Page 60-75.
      • Teplice (Teplitz)
Řídkošil, T., Slavíček, P.: Mineralizace Rennerovy štoly nedaleko Mikulova v Krušných horách. Časopis pro mineralogii a geologii, 1985, roč. 30, č. 4, s. 433.
  • Moravia (Mähren; Maehren)
    • Olomouc Region
      • Javorník (Jauernig)
Sejkora, J.: Uranové ložisko Zálesí v Rychlebských horách. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 1994, roč. 2, s. 105-110.
France
 
  • Alsace
    • Haut-Rhin
      • Ste Marie-aux-Mines (Markirch)
Wittern, Journée: "Mineralien finden in den Vogesen", 1997
        • Neuenberg
Wittern, Journée: "Mineralien finden in den Vogesen", von Loga (Cologne), 1997
Paul De Bondt
Pierre et Terre 1982
Wittern, Journée: "Mineralien finden in den Vogesen", von Loga (Cologne), 1997
      • Thur valley (Thann valley)
        • Kruth
Wittern, Journée: "Mineralien finden in den Vogesen", von Loga (Cologne), 1997; U. Kolitsch (1997): Neufunde von Mineralien aus einigen Vorkommen der Vogesen, Frankreich: Giromagny, Auxelles-Haut und Kruth 1. Aufschluss 48 (4), 243-256.
  • Corsica
    • Haute-Corse
      • Corte
        • Moïta
          • Matra
Van King
  • Languedoc-Roussillon
    • Aude
      • Carcassonne
        • Mas-Cabardès
          • Salsigne
Rocks & Min.: 60:242.
Pelison P., Descouens D. (1987), Présence de minéraux de néoformation dans les scories de l'ancienne usine de Villagnère (Aude), Le Cahier des Micromonteurs, n°2, pp: 6-10
  • Provence-Alpes-Côte d'Azur
    • Alpes-Maritimes
      • Duranus
No reference listed
Cuchet S. (2000), Mystérieuse irhtémite à Lucéram, Alpes-Maritimes, Le Règne Minéral, n°36, pp: 38-42
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Alpirsbach
No reference listed
Erzgräber 1987(2), 54
      • Hornberg
Gröbner, J. & Schrenk, D. (2005): Die Mineralien des Tunnels bei Hornberg. Der Erzgräber 19, 17-25. (in German)
      • Schenkenzell
        • Wittichen
          • Böckelsbach valley
S. Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
          • Burgfelsen
No reference listed
          • Heubach Valley
No reference listed
      • Schiltach
        • Stammelbach valley
[Lapis 1992, 11, p.13-20]
  • Hesse
    • Richelsdorf District
      • Bauhaus
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Süss
        • Richelsdorf Smelter
S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1992
    • Spessart
      • Gelnhausen
        • Bieber
No reference listed
  • Lower Saxony
    • Harz
      • St Andreasberg District
        • St Andreasberg
No reference listed
  • Saxony-Anhalt
    • Harz
      • Wernigerode
        • Hasserode
Wittern: "Mineralfundorte in Deutschland", 2001
  • Saxony
    • Erzgebirge
Lapis 17(12), 24-33
Wittern: "Mineralfundorte in Deutschland", 2001
        • Langenrinne
Frenzel, A. (1874): Mineralogisches Lexicon für das Königreich Sachsen, Leipzig.
      • Marienberg District
        • Lauta
Hajek, W. (2010): Kristallwelten Marienberg. Weise Verlag, München.
      • Schlema-Hartenstein District
        • Alberoda
Vollstädt,H. & Weiß,St. (1991): Mineralfundstellen Sächsisches Erzgebirge, München, S.26ff.
T. Witzke (1992) Mineralien-Welt 3(6), 16-18
      • Schneeberg District
        • Neustädtel
Lapis 30(7/8):41-70 (2005)
      • Schwarzenberg District
        • Langenberg
          • Graul
            • Gottes Geschick Vereinigt Feld Mine
http://www.dergraul.de
  • Thuringia
    • Gera
      • Ronneburg U deposit
T. Witzke & F. Rüger: Lapis 1998(7/8), 26-64
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Agios Konstantinos [St Constantine] (Kamariza)
No reference listed
Elbin, K. & Wendel, W. (1996): Lavendulan aus Lavrion. Lapis, 21 (11), 42-43; 62; Hanke, H. (1998): Laurion - ein Rückblick auf die Funde der letzten drei Jahre. Mineralien-Welt, 9 (2), 37-45.
        • Plaka
          • Plaka Mines
Blaß, G., Fabritz, K. H., Mühlbauer, W. and Prachar, I. (1998): … Immer wieder Neues aus Lavrion (2). Mineralien-Welt 9 (6), 48-55 (in German); Kolitsch, U., Rieck, B., Brandstätter, F., Schreiber, F., Fabritz, K. H., Blaß, G. & Gröbner, J. (2014): Neufunde aus dem altem Bergbau und den Schlacken von Lavrion (I). Mineralien-Welt 25 (1), 60-75 (in German).
Fritz Schreiber collection
No reference listed
Italy
 
  • Liguria
    • Savona Province
- Balestra, C., Kolitsch, U., Blass, G., Callegari, A.M., Boiocchi, M., Armellino, G., Ciriotti, M.E., Ambrino, P. Bracco, R. (2009): Mineralogia ligure 2007-2008: novità caratterizzate dal Servizio UK dell’AMI. Micro, 1-2009, 78-99.
  • Lombardy
    • Sondrio Province
      • Valtellina
        • Sondalo
- Gramaccioli, C.M., Scaini, G., Gentile, P., De Michele, V., Mannucci, G. (1992): Natura in Lombardia. I Minerali. Regione Lombardia, Ed., Milano, 223 pp.
  • Piedmont
    • Torino Province
      • Canavese District
        • Borgofranco d'Ivrea
          • Biò
Campostrini, I., Martini, B., Salvetti, A., Dalla Fontana, G., Boscardin, M., Ambrino, P., Ciriotti, M.E. (2012): Stibioclaudetite dalle gallerie inferiori di Biò, Borgofranco d’Ivrea (Torino). Micro, 10, 142-144
        • Léssolo
          • Cálea
  • Sardinia
    • Medio Campidano Province
      • Gonnosfanadiga
Stara, P., Rizzo, R., Tanca, G.A. (1996): Iglesiente e Arburese. Miniere e Minerali. Edito a cura dell'EMSA e "varie associazioni mineralogiche", Volume 2°, 192 pp.
Japan
 
  • Kyushu Region
    • Oita prefecture
      • Saiki City
Specimens on sale at Tokyo show, june 2010.
Ryoji Tanaka collection
Masayuki Ohnishi, Norimasa Shimobayashi, Shigetomo Kishi, Mitsuo Tanabe, Shoichi Kobayashi (2013) Talmessite from the Uriya deposit at the Kiura mining area, Oita Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 108, No. 2 (April), 116-120.
Morocco
 
  • Souss-Massa-Draâ Region
    • Ouarzazate Province
      • Tazenakht
        • Bou Azer District (Bou Azzer District)
          • Aghbar
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
          • Agoudal
Font Philippe specimen
          • Bou Azer
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
          • Ightem
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
          • Méchoui
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
Republic of Macedonia
 
  • Roszdan
[Rieck, B. (1993) - Famous mineral localities: Allchar, Macedonia, Mineralogical Record, 24 (6), 437-449]
Russia
 
  • Eastern-Siberian Region
    • Tuva Republic
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
  • Northern Caucasus Region
    • Adygea Republic (Adygeya)
Pekov I.V. et al. (2010) Mineralogy of Belorechenskoe deposit (Northern Caucasus, Russia). Mineralogical Almanakh, 15(2).
  • Western-Siberian Region
    • Altaiskii Krai
      • Gornyi Altai
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Slovakia
 
  • Banská Bystrica Region
Ďuďa R.,Kotuľak P., Káňa R., 1993: Bergbau und Mineralien von Banská Štiavnica (Schemnitz), Slowakei. Emser Hefte, 14, 3, 1-70, Haltern
  • Košice Region
    • Rožňava Co.
Koděra et all.,1990: Topografická mineralógia Slovenska, I-III, 1590p
    • Spišská Nová Ves Co.
Ďuďa R., Peterec D., 1995 : Die Mineralien der siderit - baryt lagersttäte von Rudňany ( Kotterbach ) in der Slowakei. Mineralien Welt /Haltern/, 1, s.20 - 31
  • Trenčín Region
    • Bánovce nad Bebravou Co.
      • Čierna Lehota
Martin Števko, unpublished-PXRD confirmed
South Africa
 
  • Mpumalanga Province
    • Nkangala District
      • Middelburg
        • Farm Kruisrivier 74 JS
Min Rec 27:6 pp417-428
Switzerland
 
  • Wallis (Valais)
    • Anniviers Valley
      • Ayer
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 304-305.; Ansermet, S. (2012): Mines et minéraux du Valais - II. Anniviers et Tourtemagne. With contributions by N. Meisser, Ed. Porte-plumes (Ayer)
      • Saint-Luc
Ansermet, S. with contributions of Meisser, N. (2012): Mines et minéraux du Valais. II. Anniviers et Tourtemagne. Musée de la Nature (Sion), Musée Cantonal de Géologie (Lausanne), and Editions Porte-Plumes (Ayer), 374 pp.
Taiwan
 
  • Taiwan Province
    • New Taipei City
      • Ruifang District
UK
 
  • England
    • Cumbria
      • North and Western Region (Cumberland)
        • Threlkeld District
          • St John's in the Vale
BMS Database
  • Scotland
    • Central Region (Clackmannanshire)
      • Alva
        • Silver Glen
USA
 
  • Michigan
    • Keweenaw Co.
      • Mohawk
[Mineralogical Record - Vol 23 No. 2]
  • Missouri
    • Jasper Co.
Rocks & Min., March 1998.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 741.
  • Nevada
    • Humboldt Co.
      • Osgood Mts
        • Potosi District
          • Adam Peak
MinRecord 16:15-23
NBMG Spec. Pub. 31 Minerals of Nevada
  • New Jersey
    • Sussex Co.
      • Franklin Mining District
        • Ogdensburg
          • Sterling Hill
Dunn, P.J.: Min.Rec.:10:160-165 (1979); Dunn(1995):Pt5:677.
  • Utah
    • Tooele Co.
      • Deep Creek Mts
        • Gold Hill District (Clifton District)
          • Gold Hill
      • Oquirrh Mts
        • Mercur District (Camp Floyd District)
Mineral News: 19(12): 1, 3.
          • South Mercur Pit
In the collection of Brent Thorne.
Mineral and/or Locality  
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