Lorettoite
A discredited species name
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Formula:
Pb7O6Cl2
Colour:
Honey-yellow, yellow, reddish yellow
Lustre:
Adamantine
Hardness:
2½ - 3
Specific Gravity:
7.39 - 7.95
Crystal System:
Orthorhombic
Name:
After the locality of Loretto, Tennessee, USA.
Shown to be man-made material (White, 1979). Subsequently identified to occur in additional locations.
Can be confused with asisite.
"Chubutite" is considered a synonym of lorettoite. See also Unnamed (Pb Oxide-Chloride).
Originally reported from both Loretto, Lawrence Co., Tennessee, USA and
Pick's Delta Mine (Delta Mine; Pick's Mine), Delta, San Rafael District (San Rafael Swell), Emery Co., Utah, USA.
Can be confused with asisite.
"Chubutite" is considered a synonym of lorettoite. See also Unnamed (Pb Oxide-Chloride).
Originally reported from both Loretto, Lawrence Co., Tennessee, USA and
Pick's Delta Mine (Delta Mine; Pick's Mine), Delta, San Rafael District (San Rafael Swell), Emery Co., Utah, USA.
Unique Identifiers
Mindat ID:
2437
Long-form identifier:
mindat:1:1:2437:8
IMA Classification of Lorettoite
Discredited
Classification of Lorettoite
3.DC.60
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
10.5.12.1
10 : OXYHALIDES AND HYDROXYHALIDES
5 : Am(O,OH)pXq
10 : OXYHALIDES AND HYDROXYHALIDES
5 : Am(O,OH)pXq
Physical Properties of Lorettoite
Adamantine
Colour:
Honey-yellow, yellow, reddish yellow
Streak:
Yellow
Hardness:
2½ - 3 on Mohs scale
Density:
7.39 - 7.95 g/cm3 (Measured)
Optical Data of Lorettoite
Type:
Uniaxial (-)
RI values:
nω = 2.4 nε = 2.33
Max. Birefringence:
δ = 0.070
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.
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.
Surface Relief:
Moderate
Chemistry of Lorettoite
Mindat Formula:
Pb7O6Cl2
Elements listed:
Crystallography of Lorettoite
Crystal System:
Orthorhombic
Synonyms of Lorettoite
Other Language Names for Lorettoite
Spanish:Chubutita
Chubuttita
Lorettoita
Chubuttita
Lorettoita
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 | Nadorite | PbSbClO2 |
| 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.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:
Soluble in hot dilute nitric acid. Dissolves more slowly in HCl and H2SO4. Not appreciably soluble in water.
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 Lorettoite
mindat.org URL:
https://www.mindat.org/min-2437.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Lorettoite
Localities for Lorettoite
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.
Argentina | |
| Palache et al. (1951) |
Greece | |
| 42. +2 other references |
Namibia | |
| Red asisite from the Kombat Mine has ... |
USA | |
| Palache et al. (1951) |
| Clark (1993) |
