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Heliophyllite

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Formula:
Pb6Cl4(As2O7)
Colour:
Yellow to greenish yellow
Lustre:
Vitreous, Greasy
Hardness:
2
Specific Gravity:
6.89 - 7.14
Crystal System:
Orthorhombic
Name:
From the Greek ήλιος for "sun" and φύλλον for "leaf", in allusion to the colour and the foliated habit.
Dimorph of:
Apparently dimorphous with Ecdemite.
Reinvestigation needed.


Classification of Heliophyllite

Approved, 'Grandfathered' (first described prior to 1959), Questionable
3/D.10-110
3.DC.65

3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
C : With Pb (As,Sb,Bi), without Cu
46.2.2.1

46 : ANTIMONITES AND ARSENITES CONTAINING HYDROXYL OR HALOGEN
2 : Miscellaneous
23.8

23 : Arsenites

Physical Properties of Heliophyllite

Vitreous, Greasy
Transparency:
Translucent
Comment:
Lustre vitreous on cleavages, greasy on fracture surfaces.
Colour:
Yellow to greenish yellow
Streak:
Light yellow
Hardness:
Hardness:
VHN100=96 - Vickers
Cleavage:
Very Good
On {011}, nearly perfect.
Density:
6.89 - 7.14 g/cm3 (Measured)    7.33 g/cm3 (Calculated)

Optical Data of Heliophyllite

Type:
Biaxial (-)
Dispersion:
r > v strong

Chemical Properties of Heliophyllite

Formula:
Pb6Cl4(As2O7)
IMA Formula:
Pb6As2O7Cl4

Crystallography of Heliophyllite

Crystal System:
Orthorhombic
Cell Parameters:
a = 10.823 Å, b = 10.783 Å, c = 25.58 Å
Ratio:
a:b:c = 1.004 : 1 : 2.372
Unit Cell V:
2,985.30 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Crystals acutely pyramidal with (001) ^ (111) ~53° (Pajsberg) and the inclined faces strongly striated horizontally; also tabular {001} with {011}, {101}, and (001) ^ (011) 65°36' and (011) ^ (011) 78°48' (Långban), radiating. Coarse foliated or granular aggregates (intergrown with ecdemite); ball-like, massive.
Comment:
Pseudotetragonal

Type Occurrence of Heliophyllite

Geological Setting of Type Material:
Metamorphosed Fe-Mn ore body
Associated Minerals at Type Locality:

Other Language Names for Heliophyllite

Simplified Chinese:日叶石

Common Associates

CalciteCaCO3
CerussitePbCO3
MimetitePb5(AsO4)3Cl
Associated Minerals Based on Photo Data:
Anglesite2 photos of Heliophyllite associated with Anglesite on mindat.org.
Bustamite1 photo of Heliophyllite associated with Bustamite on mindat.org.
Baryte1 photo of Heliophyllite associated with Baryte on mindat.org.
Rhodonite1 photo of Heliophyllite associated with Rhodonite on mindat.org.
Goethite1 photo of Heliophyllite associated with Goethite on mindat.org.

Related Minerals - Nickel-Strunz Grouping

3.DC.05LaurionitePbCl(OH)
3.DC.05ParalaurionitePbCl(OH)
3.DC.10FiedleritePb3FCl4(OH) · H2O
3.DC.15PenfielditePb2Cl3(OH)
3.DC.20LaurelitePb7F12Cl2
3.DC.25Bismoclite(BiO)Cl
3.DC.25Daubréeite(BiO)(OH,Cl)
3.DC.25MatlockitePbFCl
3.DC.25RorisiteCaFCl
3.DC.25Zavaritskite(BiO)F
3.DC.25ZhangpeishaniteBaFCl
3.DC.30NadoritePbSbClO2
3.DC.30PeritePbBiClO2
3.DC.35AravaipaitePb3AlF9 · H2O
3.DC.37CalcioaravaipaitePbCa2AlF9
3.DC.40ThorikositePb3Cl2(OH)(SbO3,AsO3)
3.DC.45MereheaditePb47Cl25(OH)13O24(CO3)(BO3)2
3.DC.50BlixitePb2(O,OH)2Cl
3.DC.55PinalitePb3WO5Cl2
3.DC.60SymesitePb10(SO4)O7Cl4 · H2O
3.DC.65EcdemitePb6Cl4(As2O7)
3.DC.70MendipitePb3Cl2O2
3.DC.75DamaraitePb3Cl(OH)O2
3.DC.80OnoratoiteSb8Cl2O11
3.DC.85CotunnitePbCl2
3.DC.90PseudocotunniteK2PbCl4
3.DC.95BarstowitePb4Cl6(CO3) · H2O

Related Minerals - Hey's Chemical Index of Minerals Grouping

23.2NanlingiteNa(Ca5Li)Mg12(AsO3)2[Fe(AsO3)6]F14
23.3LeiteiteZn(As2O4)
23.5Kuznetsovite(Hg+2)Hg2+(AsO4)Cl
23.6PaulmooreitePb2[As2O5]
23.7EcdemitePb6Cl4(As2O7)
23.9FinnemanitePb5(AsO3)3Cl
23.10GebharditePb8(As2O5)2OCl6
23.11Zimbabweite(Na,K)2PbAs4(Ta,Nb,Ti)4O18
23.13RouseitePb2Mn2+[AsO3]2 · 2H2O
23.14FreediteCu+Pb8(AsO3)2O3Cl5
23.15ManganarsiteMn3(As2O4)(OH)4
23.17ArmangiteMn2+26(AsO3)14(HAsO3)4(CO3)
23.18KaribibiteFe3+(As3+O2)4(As3+2O5)(OH)
23.19SchneiderhöhniteFe2+Fe3+3[As5O13]
23.20Lazarenkoite(Ca,Fe2+)Fe3+As3+3O7 · 3H2O
23.21StenhuggariteCaFeSb(AsO3)2O
23.22Tomichite(V,Fe)4Ti3AsO13(OH)

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 Heliophyllite

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Flink (1888) Ak. Stockholm, Öfversigy: 45: 574.
Hamberg (1889) Geologiska Föeningens I Stockholm. Förhandlinger, Stockholm: 11: 229.
Sillén and Melander (1941) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 103: 420.
Strunz (1942) Naturwissenschaften: 30: 89.
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.: 1037-1038.
Periodico di Mineralogia (1970): 39: 323-341.
Li, W. and G. Chen (1985) The discovery of heliophyllite in China. Acta Mineralogica Sinica, 5(3), 216–220 (in Chinese with English abs.). (3) (1987) Mineral. Abs., 38, 347.

Internet Links for Heliophyllite

mindat.org URL:
https://www.mindat.org/min-1850.html
Please feel free to link to this page.

Localities for Heliophyllite

This 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.
China
 
  • Qinghai Province
    • Haixi Autonomous Prefecture
      • Da Qaidam Co. (Dachaidan Co.)
        • Xitieshan
Li, W., and Chen, G. (1985): The discovery of heliophyllite in China. Acta Mineralogica Sinica 5(3), 216–220
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
Schnorrer-Köhler, G., Standfuss, K. & Standfuss, L. (1981): Neufunde von Mineralen aus den antiken Bleischlacken Laurions. Der Aufschluss, 32, 165-169.
        • Panormos area
https://www.mineralienatlas.de/lexikon/index.php/Griechenland/Attika%20%28Attik%ED%2C%20Attica%29/Lavrion%20%28Laurion%29%2C%20Bergbaudistrikt/Schlackenfundstellen/Panormos
        • Passa Limani area
No reference listed
        • Sounion area
Laurion The minerals in the ancient slags by Piet Gelaude etc.
        • Thorikos area
Gelaude, Piet, van Kalmthout, Piet and Rewitzer, Christian (1996) Laurion: The Minerals in the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
        • Vrissaki area
Gelaude, Piet, van Kalmthout, Piet, and Rewitzer, Christian (1996) Laurion: The Minerals in the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
Italy
 
  • Tuscany
    • Livorno Province
      • Campigliese (Campiglia Mountains; Campiglia Ridge)
        • Campiglia Marittima
          • Madonna di Fucinaia (Madonna della Fucinaia) slag heaps
http://www.comune.pisa.it/apsn/Articoli/Scorie/Capattoli.htm
      • Piombino
Muenchener Micromounter-Lithothek
Sweden (TL)
 
  • Värmland
    • Filipstad
Öfvers. KVA handl.(1888) 45, 574; 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: 1037; Nysten, P., Holtstam, D. and Jonsson, E. (1999) The Långban minerals. In Långban - The mines,their minerals, geology and explorers (D. Holtstam and J. Langhof, eds.), Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, pp. 89-183.
      • Nordmark district
        • Jakobsberg ore field
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: 1037.
      • Persberg district
        • Pajsberg
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: 1037.; Nysten, P. (1984): Kleinod des Nordens - Harstigen in Schweden. Magma 2/1984, 12-30.
USA
 
  • Nevada
    • Clark Co.
      • Spring Mts
        • Goodsprings District
NBMG Spec. Pub. 31 Minerals of Nevada
Mineral and/or Locality  
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