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Freedite

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Formula:
Cu+Pb8(AsO3)2O3Cl5
System:
Monoclinic
Colour:
Greenish yellow
Hardness:
3
Name:
After Dr. Robert L. Freed, American mineralogist, of Trinity University, San Antonio, Texas, USA.
This page provides mineralogical data about Freedite.

Classification of Freedite

Approved
4.JB.65

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
B : Arsenites, antimonites, bismuthites; with additional anions, without H2O
46.1.5.1

46 : ANTIMONITES AND ARSENITES CONTAINING HYDROXYL OR HALOGEN
1 : (AB)m(XO3)pZq
23.14

23 : Arsenites
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First Recorded Occurrence of Freedite

Year of Discovery:
1985

Physical Properties of Freedite

Vitreous
Colour:
Greenish yellow
Streak:
Yellow
Hardness (Mohs):
3
Cleavage:
Perfect
On [100].
Density:
7.43 g/cm3 (Calculated)

Crystallography of Freedite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Cell Parameters:
a = 13.578Å, b = 20.099Å, c = 7.465Å
β = 105.73°
Ratio:
a:b:c = 0.676 : 1 : 0.371
Unit Cell Volume:
V 1960.94 ų
Z:
4
Morphology:
Crystals commonly aggregated; radial forms.

Optical Data of Freedite

Type:
Biaxial

Chemical Properties of Freedite

Formula:
Cu+Pb8(AsO3)2O3Cl5
Essential elements:
All elements listed in formula:

Relationship of Freedite to other Species

4.JB.05Fetiasite(Fe3+,Fe2+,Ti)3(As2O5)O2
4.JB.10ManganarsiteMn3(As2O4)(OH)4
4.JB.15MagnussoniteMn10As6O18(OH,Cl)2
4.JB.15UM1984-09-AsO:ClHMnMn10As6O18(OH)Cl
4.JB.20ArmangiteMn262+(AsO3)14(HAsO3)4(CO3)
4.JB.25NanlingiteNaMg4(AsO3)2F4
4.JB.30AsbecasiteCa3(Ti,Sn4+)Be2(AsO3)6(SiO4)2
4.JB.35StenhuggariteCaFeSb(AsO3)2O
4.JB.40TrigonitePb3Mn2+(AsO3)2(HAsO3)
4.JB.45FinnemanitePb5(AsO3)3Cl
4.JB.50GebharditePb8(As2O5)2OCl6
4.JB.55DerbyliteFe43+Ti3Sb3+O13(OH)
4.JB.55Tomichite(V,Fe)4Ti3AsO13(OH)
4.JB.55Graeserite(Fe3+,Ti)4Ti3AsO13(OH)
4.JB.60Hemloite(Ti,V3+,Fe3+,Al)12(As3+,Sb3+)2O23(OH)
4.JB.70GeorgiadèsitePb4(AsO3)Cl4(OH)
4.JB.75Ekatite(Fe3+,Fe2+,Zn)12(AsO3)6(AsO3,HSiO4)2(OH)6
23.2NanlingiteNaMg4(AsO3)2F4
23.3LeiteiteZn(As2O4)
23.5Kuznetsovite(Hg2+)Hg2+(AsO4)Cl
23.6PaulmooreitePb2[As2O5]
23.7EcdemitePb6Cl4(As2O7)
23.8HeliophyllitePb6Cl4(As2O7)
23.9FinnemanitePb5(AsO3)3Cl
23.10GebharditePb8(As2O5)2OCl6
23.11Zimbabweite(Na,K)2PbAs4(Ta,Nb,Ti)4O18
23.13RouseitePb2Mn2+[AsO3]2 · 2H2O
23.15ManganarsiteMn3(As2O4)(OH)4
23.17ArmangiteMn262+(AsO3)14(HAsO3)4(CO3)
23.18KaribibiteFe2As4O9
23.19SchneiderhöhniteFe2+Fe33+[As5O13]
23.20Lazarenkoite(Ca,Fe2+)Fe3+As33+O7 · 3H2O
23.21StenhuggariteCaFeSb(AsO3)2O
23.22Tomichite(V,Fe)4Ti3AsO13(OH)

Other Names for Freedite

Name in Other Languages:
German:Freedit
Russian:Фридит
Spanish:Freedita

Other Information

Other Information:
Not radioactive.
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 Freedite

Reference List:
American Mineralogist: 70: 845-848.

American Mineralogist: 73: 667.

Mineralogy and Petrology: 36: 85-92.

Internet Links for Freedite

Localities for Freedite

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.
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
Schnorrer-Köhler, G., Standfuss, L. & Standfuss, K. (1991): Neue Funde aus den antiken Schlacken von Lavrion, Griechenland. Lapis, 16 (6), 21-23; 58.
        • Sounion area
No reference listed
Sweden
 
  • Värmland
    • Filipstad
Amer.Min.(1985) 70, 845-848; 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.
Mineral and/or Locality  
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