Mindat Logo
Home Page Log In Messageboard The Mindat Directory
Register Search Pages Mineral Chatroom The Mindat Store

Nealite

This page is currently not sponsored. Click here to sponsor this page.
Big Photo

Vrissaki Point slag locality, Vrissaki area, Lavrion District slag localities, Lavrion (Laurion; Laurium) District, Attikí (Attica; Attika) Prefecture, Greece
© Christian Rewitzer

Show Nealite Photos (23)



Formula:
Pb
 
4
Fe
2+
 
(As
3+
 
O
 
3
)
 
2
Cl
 
4
 · 2H
 
2
O
System:TriclinicColour:Yellow brown to orange ...
Hardness:4
Name:
Named by Pete Dunn and Roland Rouse in 1980 for Leo Neal Yedlin (March 20, 1908 - October, 1977), U. S. author and Mineralogist, who discovered the mineral.


Bladed yellow brown to orange brown crystals.

Classification of Nealite

IMA status:Approved
Strunz 8th edition ID:4/J.03-50
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:46.1.6.1

46 : ANTIMONITES AND ARSENITES CONTAINING HYDROXYL OR HALOGEN
1 : (AB)m(XO3)pZq
Hey's CIM Ref.:22.2.18

22 : Phosphates, Arsenates or Vanadates with other Anions
2 : Phosphates, arsenates or vanadates with chloride
mindat.org URL:http://www.mindat.org/min-2869.html
Please feel free to link to this page.

Type Occurrence of Nealite

Type Locality:Lavrion District slag localities, Lavrion (Laurion; Laurium) District, Attikí (Attica; Attika) Prefecture, Greece
Year of Discovery:1980
Geological Setting of type material:Ancient refinery slags which interacted with sea water

Physical Properties of Nealite

Lustre:Adamantine, Vitreous, Sub-Vitreous
Diaphaneity (Transparency):Transparent
Colour:Yellow brown to orange brown
Streak:Pale yellow to pale orange
Hardness (Mohs):4
Tenacity:Very brittle
Cleavage:None Observed
Fracture:Irregular/Uneven
Density (calculated):5.89 g/cm3

Crystallography of Nealite

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

Optical Data of Nealite

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

Chemical Properties of Nealite

Formula:
Pb
 
4
Fe
2+
 
(As
3+
 
O
 
3
)
 
2
Cl
 
4
 · 2H
 
2
O
Essential elements:As, Cl, Fe, H, O, Pb
All elements listed in formula:As, Cl, Fe, H, O, Pb

Relationship of Nealite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.JD.10Seelite
Mg(UO
 
2
)(As
3+
 
O
 
3
)
 
0.7
(AsO
 
4
)
 
0.3
 · 7H
 
2
O
4.JD.15Tooeleite
Fe
3+
6
(As
3+
 
O
 
3
)
 
4
(SO
 
4
)(OH)
 
4
 · 4H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
22.2.1Sampleite
NaCaCu
 
5
(PO
 
4
)
 
4
Cl · 5H
 
2
O
22.2.2Lavendulan
NaCaCu
 
5
(AsO
 
4
)
 
4
Cl · 5H
 
2
O
22.2.3Chlorapatite
Ca
 
5
(PO
 
4
)
 
3
Cl
22.2.4Turneaureite
Ca
 
5
(AsO
 
4
)
 
3
Cl
22.2.5Shubnikovite
Ca
 
2
Cu
 
8
(AsO
 
4
)
 
6
(OH)Cl · 7H
 
2
O
22.2.6Richelsdorfite
Ca
 
2
Cu
 
5
Sb(AsO
 
4
)
 
4
(OH)
 
6
Cl · 6H
 
2
O
22.2.7Alforsite
Ba
 
5
(PO
 
4
)
 
3
Cl
22.2.8Morelandite
Ca
 
2
Ba
 
3
(AsO
 
4
)
 
3
Cl
22.2.9Pyromorphite
Pb
 
5
(PO
 
4
)
 
3
Cl
22.2.10Mimetite
Pb
 
5
(AsO
 
4
)
 
3
Cl
22.2.11Mimetite-M
Pb
 
5
(AsO
 
4
)
 
3
Cl
22.2.12Sahlinite
Pb
 
14
(AsO
 
4
)
 
2
O
 
9
Cl
 
4
22.2.13Georgiadèsite
Pb
 
4
(AsO
 
3
)Cl
 
4
(OH)
22.2.14Vanadinite
Pb
 
5
(VO
 
4
)
 
3
Cl
22.2.15Kombatite
Pb
 
14
(VO
 
4
)
 
2
O
 
9
Cl
 
4
22.2.16Leningradite
PbCu
 
3
(VO
 
4
)
 
2
Cl
22.2.17Hedyphane
Pb
 
3
Ca
 
2
(AsO
 
4
)
 
3
Cl

Other Names for Nealite

Synonyms:
IMA1979-050Nealite-(H2O)
Other Languages:
German:Nealit
Russian:Нилит
Spanish:Nealita

Other Information

Health Warning: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:

- +
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 & Petrology 48, 193-200.

American Mineralogist (1994): 79: 391.

Internet Links for Nealite

Search Engines:
  • Look for Nealite on Google
  • Look for Nealite images on Google
    • External Links:
  • Look for Nealite on Webmineral
  • Look for Nealite on Athena Mineralogy
  • Look for Nealite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Nealite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Top quality minerals from Kristalle of California
  • Buy RARE Minerals from Rocks of Africa
  • Search for minerals at Heliodor
  • Fine and rare minerals from mintreasure.com
  • Find Nealite on www.crystalclassics.co.uk
  • webminerals
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Search for - Nealite - on e-Rocks Mineral Sales & Auctions
  • High-end worldwide specimens & outstanding customer service
  • Nealite specimens for sale - minfind.com
  • Wilensky Fine Minerals
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
    • Jobs:
  • Mining & Geology Jobs

    • Localities for Nealite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? 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
     
    • Attikí (Attica; Attika) Prefecture
      • Lavrion (Laurion; Laurium) District
    		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
          • 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
    Mineral and/or Locality
    Search Google
     
    Copyright © Jolyon Ralph and Ida Chau 1993-2013. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
    Current server date and time: 11th Apr 2013 16:23:52
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds