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Nealite

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Leo Neal Yedlin
Formula:
Pb4Fe2+(As3+O3)2Cl4 · 2H2O
Colour:
Yellow brown to orange brown
Lustre:
Adamantine, Vitreous, Sub-Vitreous
Hardness:
4
Specific Gravity:
5.89 (Calculated)
Crystal System:
Triclinic
Name:
Named by Pete Dunn and Roland Rouse in 1980 for Leo Neal Yedlin (20 March 1908, Brooklyn, NY, USA - 7 October 1977, New Haven, CT, USA), American lawyer, author, and prominent mineral collector, who discovered the mineral. The mineral yedlinite is also named in his honor.
Bladed yellow brown to orange brown crystals.


Classification of Nealite

Approved
4.JD.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
D : Arsenites, antimonites, bismuthites; with additional anions, with H2O
46.1.6.1

46 : ANTIMONITES AND ARSENITES CONTAINING HYDROXYL OR HALOGEN
1 : (AB)m(XO3)pZq
22.2.18

22 : Phosphates, Arsenates or Vanadates with other Anions
2 : Phosphates, arsenates or vanadates with chloride

Physical Properties of Nealite

Adamantine, Vitreous, Sub-Vitreous
Transparency:
Transparent
Colour:
Yellow brown to orange brown
Streak:
Pale yellow to pale orange
Hardness:
Tenacity:
Very brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
5.89 g/cm3 (Calculated)

Optical Data of Nealite

Type:
Biaxial
Dispersion:
relatively weak
Pleochroism:
Non-pleochroic

Chemical Properties of Nealite

Formula:
Pb4Fe2+(As3+O3)2Cl4 · 2H2O
IMA Formula:
Pb4Fe(AsO3)2Cl4 · 2H2O

Crystallography of Nealite

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 6.53 Å, b = 10.23 Å, c = 5.58 Å
α = 96.41°, β = 89.52°, γ = 97.82°
Ratio:
a:b:c = 0.638 : 1 : 0.545
Unit Cell V:
366.97 ų (Calculated from Unit Cell)
Z:
1

X-Ray Powder Diffraction

Powder Diffraction Data:
d-spacingIntensity
10.09 (60)
6.48 (80)
4.24 (70)
3.92 (50)
3.54 (100)
3.25 (60)
2.97 (50)
2.78 (60)
Comments:
33-0755

Type Occurrence of Nealite

Geological Setting of Type Material:
Ancient refinery slags which interacted with sea water

Synonyms of Nealite

Other Language Names for Nealite

German:Nealit
Russian:Нилит
Spanish:Nealita

Common Associates

Associated Minerals Based on Photo Data:
Paralaurionite8 photos of Nealite associated with Paralaurionite on mindat.org.
Laurionite5 photos of Nealite associated with Laurionite on mindat.org.
Cerussite3 photos of Nealite associated with Cerussite on mindat.org.
Phosgenite3 photos of Nealite associated with Phosgenite on mindat.org.
Georgiadèsite3 photos of Nealite associated with Georgiadèsite on mindat.org.
Gypsum1 photo of Nealite associated with Gypsum on mindat.org.
Goethite1 photo of Nealite associated with Goethite on mindat.org.

Related Minerals - Nickel-Strunz Grouping

4.JD.10SeeliteMg(UO2)(As3+O3)0.7(AsO4)0.3 · 7H2O
4.JD.15TooeleiteFe3+6(As3+O3)4(SO4)(OH)4 · 4H2O

Related Minerals - Hey's Chemical Index of Minerals Grouping

22.2.1SampleiteNaCaCu5(PO4)4Cl · 5H2O
22.2.2LavendulanNaCaCu5(AsO4)4Cl · 5H2O
22.2.3ChlorapatiteCa5(PO4)3Cl
22.2.4TurneaureiteCa5(AsO4)3Cl
22.2.5ShubnikoviteCa2Cu8(AsO4)6(OH)Cl · 7H2O
22.2.6RichelsdorfiteCa2Cu5Sb(AsO4)4(OH)6Cl · 6H2O
22.2.7AlforsiteBa5(PO4)3Cl
22.2.8MorelanditeCa2Ba3(AsO4)3Cl
22.2.9PyromorphitePb5(PO4)3Cl
22.2.10MimetitePb5(AsO4)3Cl
22.2.11Mimetite-MPb5(AsO4)3Cl
22.2.12SahlinitePb14(AsO4)2O9Cl4
22.2.13GeorgiadèsitePb4(AsO3)Cl4(OH)
22.2.14VanadinitePb5(VO4)3Cl
22.2.15KombatitePb14(VO4)2O9Cl4
22.2.16LeningraditePbCu3(VO4)2Cl
22.2.17HedyphaneCa2Pb3(AsO4)3Cl

Related Minerals - Dana Grouping (8th Ed.)

46.1.6.1MagnussoniteMn10As6O18(OH,Cl)2
46.1.6.2UM1984-09-AsO:ClHMnMn10As6O18(OH)Cl

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 Nealite

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Dunn, P.J., Rouse, R.C. (1980) Nealite: a new mineral from Laurion Greece. Mineralogical Record: 11: 299-301.
Guiseppetti, G., Mazzi, F., Tadini, C. (1993) The crystal structure of nealite. Neues Jahrbuch für Mineralogie, Monatshefte: 1993: 278-288.
Pertlik, F., Schnorrer, G. (1993) A re-appraisal of the chemical formula of nealite, Pb4Fe(AsO3)2Cl4.2H2O, on the basis of a crystal structure determination. Mineralogy and Petrology: 48: 193-200.
Jambor, J.L., Grew, E.S. (1994) New mineral names. American Mineralogist: 79: 387-391.

Internet Links for Nealite

mindat.org URL:
https://www.mindat.org/min-2869.html
Please feel free to link to this page.

Localities for Nealite

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.
France
 
  • Brittany
    • Côtes-d'Armor
      • Callac
        • Carnoët
          • Menez-Plom
P. Le Roch collection
Germany
 
  • Lower Saxony
    • Harz
      • Goslar
        • Astfeld
No reference listed
Greece (TL)
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
Min.Rec.(1980) 11, 299-301; Schnorrer-Köhler, G., Standfuss, K. & Standfuss, L. (1981): Neufunde von Mineralen aus den antiken Bleischlacken Laurions. Der Aufschluss, 32, 165-169.; Gelaude, Piet, van Kalmthout, Piet and Rewitzer, Christian (1996): Laurion: The Minerals in the Ancient Slags
        • Lavrion (Laurion; Laurium)
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 (II). Mineralien-Welt 25 (2), 82-95 (in German).
        • Oxygon area
No reference listed
        • Passa Limani area
Gelaude, Piet, van Kalmthout, Piet, and Rewitzer, Christian (1996) Laurion: The Minerals of the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
        • Sounion area
Fritz Schreiber collection (SXRD-analysed by Uwe Kolitsch)
Bonifazi Marco, Marius Utens and Fritz Schreiber collections; van Kalmthout, P. (2012): De slakkenmineralen van Lavrion (Gr.) - Ontwikkelingen na 1996, inclusief een archeologische ontdekking. GEA, 45 (1), 14-19 (in Dutch).
        • 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
 
  • Liguria
    • Genova Province
      • Genova
        • Varenna Valley
Rivista Mineralogica Italiana, 22 (3), 39-41.
  • Tuscany
    • Livorno Province
      • Piombino
Muenchener Micromounter-Lithothek
Poland
 
  • Upper Silesia (Śląskie)
Warchulski, R., Gawęda, A., Szopa, K. (2014): Secondary phases from the Zn-Pb smelting slags from Katowice – Piekary Śląskie area, Upper Silesia, Poland: a SEM – XRD overview. Mineralogia Special Papers: 42: 110-111
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