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.
See also chubutite (now considered a synonym of lorettoite) and 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.
See also chubutite (now considered a synonym of lorettoite) and 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
GUID
(UUID V4):
(UUID V4):
aa470acc-fdbe-4ba7-9096-6288baa3d249
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 = 2.400 nε = 2.330
Max Birefringence:
δ = 0.070
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Very High
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. | Lucabindiite | (K,NH4)As4O6(Cl,Br) |
3.DC. | Torrecillasite | Na(As,Sb)3+4O6Cl |
3.DC. | Gajardoite | KCa0.5As3+4O6Cl2 · 5H2O |
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.05 | Laurionite | PbCl(OH) |
3.DC.05 | Paralaurionite | PbCl(OH) |
3.DC.05 | Russoite | (NH4)ClAs2O3(H2O)0.5 |
3.DC.05 | Mauriziodiniite | (NH4)(As2O3)2I |
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 | Bismoclite | BiOCl |
3.DC.25 | Matlockite | PbFCl |
3.DC.25 | Rorisite | CaFCl |
3.DC.25 | Zavaritskite | (BiO)F |
3.DC.25 | Zhangpeishanite | BaFCl |
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 | Pinalite | Pb3WO5Cl2 |
3.DC.55 | Vladkrivovichevite | [Pb32O18][Pb4Mn2O]Cl14(BO3)8 · 2H2O |
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 | Pb6Cl4(As2O7) |
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
Reference List:
Localities for Lorettoite
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).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
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 (1944) |
| Clark (1993) |