Boojumite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Boojumite
The Boojum is said to inhabit the caves of Haywood County, North Carolina
Redmond Mine, Waterville Lake, Haywood County, North Carolina, USA
Redmond Mine, Waterville Lake, Haywood County, North Carolina, USA
Formula:
Pb8O4(OH)2(S2O3)3
Colour:
yellow
Lustre:
Adamantine
Hardness:
2½
Specific Gravity:
6.619 (Calculated)
Crystal System:
Orthorhombic
Name:
The name boojumite is for the Boojum, a legendary creature said to inhabit caves in Haywood County and covet the gemstones of western North Carolina. One can imagine that the transparency and very high lustre of boojumite would attract the eye of the Boojum. (www.visitncsmokies.com/blog/the-legend-of-the-boojum)
Another new thiosulfate from the Redmond mine; compare redmondite, hydroredmondite, hexathioplumbite, cubothioplubmite, hayelasdiite, and finescreekite. Also comparable to steverustite and fassinaite.
Unique Identifiers
Mindat ID:
56157
Long-form identifier:
mindat:1:1:56157:0
IMA Classification of Boojumite
Approved
IMA Formula:
Pb2+8O4(OH)2(S6+O3S2-)3
Approval history:
IMA no. 2022-028
Type description reference:
Kampf, Anthony R.; Smith, Jason B.; Hughes, John M.; Ma, Chi; Emproto, Christopher (2024) New Minerals from the Redmond Mine, North Carolina, USA: VI. Boojumite and Kennygayite, Two New Minerals with Structures Based on Chains of Oxocentered OPb4 TETRAHEDRA. The Canadian Journal of Mineralogy and Petrology, 62 (2). doi:10.3749/2300051
Classification of Boojumite
7.JA.
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
J : Thiosulfates
A : Thiosulfates of Pb
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
J : Thiosulfates
A : Thiosulfates of Pb
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Bjm | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Boojumite
Adamantine
Colour:
Yellow
Streak:
Very pale yellow
Hardness:
2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
6.619 g/cm3 (Calculated)
Optical Data of Boojumite
Type:
Biaxial (-)
RI values:
nα = 2.0350 nβ = 2.0710 nγ = 2.0725
2V:
Measured: 43° (3)
Max. Birefringence:
δ = 0.038
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:
Moderate
Comments:
α = 2.0350(calc.), β = 2.0710(calc.), γ = 2.0725(calc.)
Chemistry of Boojumite
Mindat Formula:
Pb8O4(OH)2(S2O3)3
Element Weights:
Elements listed:
Crystallography of Boojumite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Pnma
Setting:
Pnma
Cell Parameters:
a = 14.0103(8) Å, b = 20.553(1) Å, c = 7.2668(5) Å
Ratio:
a:b:c = 0.682 : 1 : 0.354
Unit Cell V:
2,092.50 ų (Calculated from Unit Cell)
Z:
4
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
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) |
|---|---|---|---|---|---|---|---|
| M11962 | Boojumite | Kampf, A. R., Smith, J. B., Hughes, J. M., Ma, C., & Emproto, C. (2024) New Minerals from the Redmond Mine, North Carolina, USA: VI. Boojumite and Kennygayite, Two New Minerals with Structures Based on Chains of Oxocentered OPb4 Tetrahedra. The Canadian Journal of Mineralogy and Petrology, 62(2), 391-403 |  | 2024 | Redmond Mine, North Carolina, USA | 0 | 298 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.52 Å | (41) |
| 3.559 Å | (38) |
| 3.411 Å | (15) |
| 3.160 Å | (32) |
| 2.911 Å | (100) |
| 2.694 Å | (14) |
| 1.799 Å | (24) |
| 1.613 Å | (14) |
Reference:
Kampf, Anthony R.; Smith, Jason B.; Hughes, John M.; Ma, Chi; Emproto, Christopher (2024) New Minerals from the Redmond Mine, North Carolina, USA: VI. Boojumite and Kennygayite, Two New Minerals with Structures Based on Chains of Oxocentered OPb4 TETRAHEDRA. The Canadian Journal of Mineralogy and Petrology, 62 (2). doi:10.3749/2300051
Type Occurrence of Boojumite
General Appearance of Type Material:
yellow prisms or blades to about 0.3 mm long
Place of Conservation of Type Material:
mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue numbers 76225 (holotype) and 76226 (cotype)
Geological Setting of Type Material:
highly unusual secondary assemblage that comprises a variety of rare Pb-Zn-Cu sulfates, thiosulfates, and carbonates
Associated Minerals at Type Locality:
Reference:
Kampf, Anthony R.; Smith, Jason B.; Hughes, John M.; Ma, Chi; Emproto, Christopher (2024) New Minerals from the Redmond Mine, North Carolina, USA: VI. Boojumite and Kennygayite, Two New Minerals with Structures Based on Chains of Oxocentered OPb4 TETRAHEDRA. The Canadian Journal of Mineralogy and Petrology, 62 (2). doi:10.3749/2300051
Other Language Names for Boojumite
Related Minerals - Strunz-mindat Grouping
| 7.JA. | Hayelasdiite | [Pb4O1.5(OH)2.5]2[Cu+5(S2O3)4(S2O2OH)2(H2O)] · 4H2O |
| 7.JA. | Finescreekite | [Pb4(OH)4](S2O3)2 |
| 7.JA. | Boevskite | Pb4(TeO3)2(SO4)(S2O3) |
| 7.JA. | Redmondite | [Pb8O2Zn(OH)6](S2O3)4 |
| 7.JA. | Hydroredmondite | [Pb8O2Zn(OH)6](S2O3)4 · 2H2O |
| 7.JA. | Dinilawiite | [Pb4OAl(OH)6]2(S2O3)2 · (S2O3)(H2O)5 |
| 7.JA. | Sulfatoredmondite | [Pb8O2Zn(OH)6](SO4)4 · 6H2O |
| 7.JA. | Cubothioplumbite | [Pb4(OH)4]Pb(S2O3)3 |
| 7.JA. | Hexathioplumbite | [Pb2+4(OH)4]Pb2+(S6+O3S2-)3 |
| 7.JA.05 | Sidpietersite | Pb2+4(S2O3)O2(OH)2 |
| 7.JA.10 | Steverustite | Pb2+5(OH)5[Cu+(S6+O3S2-)3](H2O)2 |
| 7.JA.15 | Fassinaite | Pb2(S2O3)(CO3) |
| 7.JA.20 | Northstarite | Pb6(Te4+O3)5(S6+O3S2-) |
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.
Internet Links for Boojumite
mindat.org URL:
https://www.mindat.org/min-56157.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Boojumite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2022) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 68. European Journal of Mineralogy, 34 (5) 385-391 doi:10.5194/ejm-34-385-2022
Kampf, Anthony R.; Smith, Jason B.; Hughes, John M.; Ma, Chi; Emproto, Christopher (2024) New Minerals from the Redmond Mine, North Carolina, USA: VI. Boojumite and Kennygayite, Two New Minerals with Structures Based on Chains of Oxocentered OPb4 TETRAHEDRA. The Canadian Journal of Mineralogy and Petrology, 62 (2). doi:10.3749/2300051
Localities for Boojumite
Showing 1 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.
USA (TL) | |
| Miyawaki et al. (2022) |
Quick NavTopAbout BoojumiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionType Occurrence Other LanguagesStrunz-MindatOther InformationInternet Links References Localities Locality List
Redmond Mine, Waterville Lake, Haywood County, North Carolina, USA