Nadorite
A valid IMA mineral species - grandfathered
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About Nadorite
Formula:
PbSbClO2
Colour:
Brown, yellow to brownish yellow
Lustre:
Adamantine, Resinous
Hardness:
3½ - 4
Specific Gravity:
7.02
Crystal System:
Orthorhombic
Member of:
Name:
After the type locality at Djebel Nador, Algeria.
Isostructural with:
Nadorite Group.
A secondary mineral in antimony-bearing hydrothermal deposits.
A tetragonal dimorph is known as a synthetic phase and in slags.
A secondary mineral in antimony-bearing hydrothermal deposits.
A tetragonal dimorph is known as a synthetic phase and in slags.
Unique Identifiers
Mindat ID:
2827
Long-form identifier:
mindat:1:1:2827:7
Similar Names
IMA Classification of Nadorite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Pb2+Sb3+O2Cl
Classification of Nadorite
3.DC.30
3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
C : With Pb (As,Sb,Bi), without Cu
3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
C : With Pb (As,Sb,Bi), without Cu
10.2.5.2
10 : OXYHALIDES AND HYDROXYHALIDES
2 : A(O,OH)Xq
10 : OXYHALIDES AND HYDROXYHALIDES
2 : A(O,OH)Xq
24.3.4
24 : Antimonates and Antimonites
3 : Antimonates of Ti and Pb
24 : Antimonates and Antimonites
3 : Antimonates of Ti and Pb
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Nad | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Nad | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Pronunciation of Nadorite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Nadorite
Adamantine, Resinous
Transparency:
Translucent
Colour:
Brown, yellow to brownish yellow
Streak:
White, yellow to yellowish white
Hardness:
3½ - 4 on Mohs scale
Cleavage:
Perfect
On {010}, perfect.
On {010}, perfect.
Density:
7.02 g/cm3 (Measured) 7.06 g/cm3 (Calculated)
Optical Data of Nadorite
Type:
Biaxial (+)
RI values:
nα = 2.3 nβ = 2.34 - 2.35 nγ = 2.36 - 2.4
2V:
Measured: 85° , Calculated: 88°
Max. Birefringence:
δ = 0.060 - 0.100
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Dispersion:
strong
Chemistry of Nadorite
Mindat Formula:
PbSbClO2
Element Weights:
Elements listed:
Crystallography of Nadorite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Cmcm
Cell Parameters:
a = 5.603 Å, b = 12.245 Å, c = 5.448 Å
Ratio:
a:b:c = 0.458 : 1 : 0.445
Unit Cell V:
373.78 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Crystals tabular {010}, or elongated [100], also lenticular [010] with a square or octagonal outline. May be subparallel or divergent platy groups.
Twinning:
On {101}, nearly perpendicular (91°45'), common.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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CIF File Best | x | y | z | a | b | c
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0014937 | Nadorite | Giuseppetti G, Tadini C (1973) Riesame della struttura cristallina della nadorite: PbSbO2Cl Periodico di Mineralogia 42 335-345 | 1973 | Djebel Nador, Algeria | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.71 Å | (30) |
| 2.800 Å | (100) |
| 2.703 Å | (25) |
| 2.057 Å | (25) |
| 1.945 Å | (30) |
| 1.615 Å | (30) |
| 1.587 Å | (30) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] | |
| 47g : [Halogen-bearing surface weathering minerals] | |
| 47h : [Near-surface oxidized, dehydrated minerals] | |
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 57 : Other minerals formed by human processes |
Type Occurrence of Nadorite
Associated Minerals at Type Locality:
Synonyms of Nadorite
Other Language Names for Nadorite
Relationship of Nadorite to other Species
Member of:
Other Members of Nadorite Group:
Common Associates
Associations Based on Photo Data:
| 6 photos of Nadorite associated with Jamesonite | Pb4FeSb6S14 |
| 4 photos of Nadorite associated with Valentinite | Sb2O3 |
| 3 photos of Nadorite associated with Bindheimite | Pb2Sb2O6O |
| 3 photos of Nadorite associated with Mimetite | Pb5(AsO4)3Cl |
| 3 photos of Nadorite associated with Cerussite | PbCO3 |
| 2 photos of Nadorite associated with Smithsonite | ZnCO3 |
| 2 photos of Nadorite associated with Anglesite | PbSO4 |
| 2 photos of Nadorite associated with Senarmontite | Sb2O3 |
| 1 photo of Nadorite associated with Stibnite | Sb2S3 |
| 1 photo of Nadorite associated with Native Sulphur | S8 |
Related Minerals - Strunz-mindat Grouping
| 3.DC. | Gajardoite | KCa0.5As3+4O6Cl2 · 5H2O |
| 3.DC. | Lucabindiite | (K,NH4)As4O6(Cl,Br) |
| 3.DC. | Cuatrocapaite-(NH4) | (NH4)3(NaMg◻)(As2O3)6Cl6 · 16H2O |
| 3.DC. | Cuatrocapaite-(K) | K3(NaMg◻)(As2O3)6Cl6 · 16H2O |
| 3.DC. | Napoliite | Pb2OFCl |
| 3.DC. | Torrecillasite | Na(As,Sb)3+4O6Cl |
| 3.DC.05 | Paralaurionite | PbCl(OH) |
| 3.DC.05 | Laurionite | PbCl(OH) |
| 3.DC.05 | Mauriziodiniite | (NH4)(As2O3)2I |
| 3.DC.05 | Russoite | (NH4)ClAs2O3(H2O)0.5 |
| 3.DC.10 | Fiedlerite | Pb3FCl4(OH) · H2O |
| 3.DC.15 | Penfieldite | Pb2Cl3(OH) |
| 3.DC.15 | Telluroperite | Pb3TeO4Cl2 |
| 3.DC.20 | Laurelite | Pb7F12Cl2 |
| 3.DC.25 | Zhangpeishanite | BaFCl |
| 3.DC.25 | Matlockite | PbFCl |
| 3.DC.25 | Zavaritskite | (BiO)F |
| 3.DC.25 | Rorisite | CaFCl |
| 3.DC.25 | Bismoclite | BiOCl |
| 3.DC.25 | Vegrandisite | BaCl2 |
| 3.DC.30 | Perite | PbBiClO2 |
| 3.DC.40 | Thorikosite | Pb3Cl2(OH)(SbO3,AsO3) |
| 3.DC.45 | Mereheadite | Pb47Cl25(OH)13O24(CO3)(BO3)2 |
| 3.DC.50 | Blixite | Pb8O5(OH)2Cl4 |
| 3.DC.52 | Rumseyite | Pb2OClF |
| 3.DC.55 | Vladkrivovichevite | [Pb32O18][Pb4Mn2O]Cl14(BO3)8 · 2H2O |
| 3.DC.55 | Pinalite | Pb3WO5Cl2 |
| 3.DC.57 | Yeomanite | Pb2O(OH)Cl |
| 3.DC.60 | Symesite | Pb10(SO4)O7Cl4 · H2O |
| 3.DC.60 | 'Lorettoite' | Pb7O6Cl2 |
| 3.DC.62 | 'Sarawakite (of Frenzel)' | Sb, O, Cl (?) |
| 3.DC.65 | Ecdemite | Pb6As3+2O7Cl4 |
| 3.DC.70 | Mendipite | Pb3Cl2O2 |
| 3.DC.75 | Damaraite | Pb3Cl(OH)O2 |
| 3.DC.80 | Onoratoite | Sb8Cl2O11 |
| 3.DC.95 | Barstowite | Pb4Cl6(CO3) · H2O |
Other Information
Notes:
Alters to Cerussite.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Nadorite
mindat.org URL:
https://www.mindat.org/min-2827.html
Please feel free to link to this page.
Please feel free to link to this page.
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Mineral Dealers:
References for Nadorite
Reference List:
Larsen, Esper S. (1921) The microscopic determination of the nonopaque minerals. Bulletin 679. US Geological Survey doi:10.3133/b679 p.113
Larsen, E.S.; Berman, H. (1934) The microscopic determination of the nonopaque minerals. Bulletin of the US Geological Survey Vol. 848. US Geological Survey p.1-266. doi:10.3133/b848 p.211
Sillén, Lars Gunnar, Melander, Lars (1941) X-Ray Studies on the Oxyhalide Minerals Nadorite (Ochrolite) PbSbO2Cl and Ekdemite. Zeitschrift für Kristallographie, 103 (1) 420 doi:10.1524/zkri.1941.103.1.420
Localities for Nadorite
Showing 25 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Algeria (TL) | |
| Dana et al. (1892) +2 other references |
Australia | |
| Leverett et al. (2005) +1 other reference |
| Birch (1999) |
Austria | |
| Kolitsch et al. (2013) |
Bulgaria | |
| Breskovska et al. (1982) |
France | |
| Boisson J.-M. (2025) |
Germany | |
| Weiß (1990) |
Morocco | |
| Bode et al. (2013) |
Namibia | |
| Keller et al. (1986) |
Papua New Guinea | |
| Petersen et al. (2002) |
Portugal | |
| Alves (n.d.) |
Spain | |
| Georges FAVREAU collection and EDX ... |
| Rewitzer et al. (2020) |
Sweden | |
| Holtstam et al. (1999) +1 other reference |
| Thulin (2003) | |
| Nysten (2003) | |
| Åberg et al. (1986) | |
| Nysten (1984) +1 other reference |
UK | |
| Golley et al. (1995) |
| Golley et al. (1995) |
| Russell (1927) +2 other references |
| Kingsbury (1957) +1 other reference |
| Golley et al. (1995) |
| Golley et al. (1995) | |
USA | |
| [micromounts@yahoogroups.com] |
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Långban Mine, Långban Ore District, Filipstad, Värmland County, Sweden