Log In
Lanmuchangite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Lanmuchangite
Formula:
Tl+Al(SO4)2 · 12H2O
Colour:
pale yellow, white
Lustre:
Vitreous
Hardness:
3 - 3½
Specific Gravity:
2.22
Crystal System:
Isometric
Member of:
Name:
After the type locality: Lanmuchang Tl-Hg ore deposit, Guizhou, China.
This page provides mineralogical data about Lanmuchangite.
Unique Identifiers
Mindat ID:
11003
Long-form identifier:
mindat:1:1:11003:9
IMA Classification of Lanmuchangite
Approved
IMA Formula:
Tl1+Al(S6+O4)2(H2O)12
Approval year:
2001
First published:
2001
Classification of Lanmuchangite
7.CC.20
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
C : With medium-sized and large cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
C : With medium-sized and large cations
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 |
|---|---|---|
| Lmh | 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 Lanmuchangite
Vitreous
Transparency:
Transparent
Colour:
Pale yellow, white
Streak:
White
Hardness:
3 - 3½ on Mohs scale
Hardness:
VHN100=94 - 124 - Vickers
Hardness Data:
Measured
Tenacity:
Brittle
Density:
2.22 g/cm3 (Measured) 2.35 g/cm3 (Calculated)
Optical Data of Lanmuchangite
Type:
Isotropic
RI values:
n = 1.495
Surface Relief:
Moderate (negative)
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
Chemistry of Lanmuchangite
Mindat Formula:
Tl+Al(SO4)2 · 12H2O
Element Weights:
Common Impurities:
K,Mg,Ca,Fe,Si
Crystallography of Lanmuchangite
Crystal System:
Isometric
Class (H-M):
m3(2/m3) - Diploidal
Space Group:
Pa3
Cell Parameters:
a = 12.212 Å
Unit Cell V:
1871 ų
Z:
4
Morphology:
Anhedral grains to 0.09 mm, also columnar.
Twinning:
None mentioned.
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) |
|---|---|---|---|---|---|---|---|
| 0009916 | Lanmuchangite | Nyburg S C, Steed J, Aleksovska S, Petrusevski V M (2000) Structure of the alums. I. On the sulfate group disorder in the alpha-alums Acta Crystallographica B56 204-209 |  | 2000 | synthetic | 0 | 293 |
| 0009915 | Lanmuchangite | Nyburg S C, Steed J, Aleksovska S, Petrusevski V M (2000) Structure of the alums. I. On the sulfate group disorder in the alpha-alums Acta Crystallographica B56 204-209 | | 2000 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.03 Å | (54) |
| 6.11 Å | (27) |
| 4.314 Å | (100) |
| 3.524 Å | (24) |
| 2.801 Å | (70) |
| 2.731 Å | (35) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47b : [Sulfates and sulfites] |
Type Occurrence of Lanmuchangite
General Appearance of Type Material:
Compact aggregates to 10 mm, consisting either of anhedral granular crystals with no distinct boundaries ranging in size from 40 µm to 90 µm or, rarely, of euhedral to subhedral columnar crystals ranging in diameter from 15 µm to 65 µm.
Place of Conservation of Type Material:
Geological Museum of China, Beijing.
Geological Setting of Type Material:
In the oxidation zone of a Tl-Hg deposit.
Associated Minerals at Type Locality:
Synonyms of Lanmuchangite
Other Language Names for Lanmuchangite
Dutch:Lanmuchangiet
German:Lanmuchangit
Russian:Ланьмучанит
Simplified Chinese:铊明矾
Spanish:Lanmuchangita
Traditional Chinese:鉈明礬
Relationship of Lanmuchangite to other Species
Member of:
Other Members of Alum Group:
| Alum-(K) | KAl(SO4)2 · 12H2O | Iso. m3(2/m3) : Pa3 |
| Alum-(Na) | NaAl(SO4)2 · 12H2O | Iso. m3(2/m3) : Pa3 |
| Tschermigite | (NH4)Al(SO4)2 · 12H2O | Iso. m3(2/m3) : Pa3 |
Related Minerals - Strunz-mindat Grouping
| 7.CC. | Cobaltoblödite | Na2Co(SO4)2 · 4H2O |
| 7.CC. | Andychristyite | PbCu2+Te6+O5(H2O) |
| 7.CC. | Ammoniovoltaite | (NH4)2Fe2+5Fe3+3Al(SO4)12(H2O)18 |
| 7.CC.05 | Krausite | KFe(SO4)2 · H2O |
| 7.CC.10 | Tamarugite | NaAl(SO4)2 · 6H2O |
| 7.CC.15 | Mendozite | NaAl(SO4)2 · 11H2O |
| 7.CC.15 | Kalinite | KAl(SO4)2 · 11H2O |
| 7.CC.20 | Alum-(Na) | NaAl(SO4)2 · 12H2O |
| 7.CC.20 | Lonecreekite | (NH4)Fe3+(SO4)2 · 12H2O |
| 7.CC.20 | Alum-(K) | KAl(SO4)2 · 12H2O |
| 7.CC.20 | Tschermigite | (NH4)Al(SO4)2 · 12H2O |
| 7.CC.25 | Zincovoltaite | K2Zn5Fe3+3Al(SO4)12 · 18H2O |
| 7.CC.25 | Voltaite | K2Fe2+5Fe3+3Al(SO4)12 · 18H2O |
| 7.CC.25 | Magnesiovoltaite | K2Mg5Fe3+3Al(SO4)12 · 18H2O |
| 7.CC.25 | Pertlikite | K2(Fe2+,Mg)2(Mg,Fe3+)4Fe3+2Al(SO4)12 · 18H2O |
| 7.CC.25 | Ammoniomagnesiovoltaite | (NH4)2Mg2+5Fe3+3Al(SO4)12 · 18H2O |
| 7.CC.30 | Kröhnkite | Na2Cu(SO4)2 · 2H2O |
| 7.CC.35 | Ferrinatrite | Na3Fe(SO4)3 · 3H2O |
| 7.CC.40 | Goldichite | KFe(SO4)2 · 4H2O |
| 7.CC.45 | Löweite | Na12Mg7(SO4)13 · 15H2O |
| 7.CC.50 | Nickelblödite | Na2Ni(SO4)2 · 4H2O |
| 7.CC.50 | Blödite | Na2Mg(SO4)2 · 4H2O |
| 7.CC.50 | Changoite | Na2Zn(SO4)2 · 4H2O |
| 7.CC.55 | Leonite | K2Mg(SO4)2 · 4H2O |
| 7.CC.55 | Mereiterite | K2Fe(SO4)2 · 4H2O |
| 7.CC.60 | Nickelpicromerite | K2Ni(SO4)2 · 6H2O |
| 7.CC.60 | Nickelboussingaultite | (NH4)2Ni(SO4)2 · 6H2O |
| 7.CC.60 | Katerinopoulosite | (NH4)2Zn(SO4)2 · 6H2O |
| 7.CC.60 | Picromerite | K2Mg(SO4)2 · 6H2O |
| 7.CC.60 | Cyanochroite | K2Cu(SO4)2 · 6H2O |
| 7.CC.60 | Mohrite | (NH4)2Fe(SO4)2 · 6H2O |
| 7.CC.60 | Boussingaultite | (NH4)2Mg(SO4)2 · 6H2O |
| 7.CC.65 | Polyhalite | K2Ca2Mg(SO4)4 · 2H2O |
| 7.CC.70 | Leightonite | K2Ca2Cu(SO4)4 · 2H2O |
| 7.CC.75 | Amarillite | NaFe(SO4)2 · 6H2O |
| 7.CC.80 | Konyaite | Na2Mg(SO4)2 · 5H2O |
| 7.CC.85 | Wattevilleite | Na2Ca(SO4)2 · 4H2O (?) |
| 7.CC.85 | Xocolatlite | Ca2Mn4+2(Te6+O6)2 · H2O |
| 7.CC.90 | Eckhardite | (Ca,Pb)Cu2+Te6+O5(H2O) |
Other Information
Notes:
Water soluble
Health Risks:
Although no particular details given, as a water-soluble Thallium salt this should be regarded as highly lethal, and any direct contact with this mineral should be avoided.
Internet Links for Lanmuchangite
mindat.org URL:
https://www.mindat.org/min-11003.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 Lanmuchangite
Reference List:
Eysel, Hans Hermann; Eckert, J. (1976) Einkristall‐Raman‐Spektren von Alaunen. I. Innere Schwingungen, Frequenzbereich 300 bis 1200 cm−1. Zeitschrift für anorganische und allgemeine Chemie, 424 (1). 68-80 doi:10.1002/zaac.19764240111
Eckert, J.; Eysel, H. H.; Kampffmeyer, G. L. (1976) Einkristall‐Raman‐Spektren von Alaunen. II. [1]. Raman‐aktive Gitterschwingungen und FIR‐Spektren. Zeitschrift für anorganische und allgemeine Chemie, 424 (1). 81-86 doi:10.1002/zaac.19764240112
Mandarino, Joseph A. (2002) New minerals. The Canadian Mineralogist, 40 (4) 1215-1234 doi:10.2113/gscanmin.40.4.1215
Localities for Lanmuchangite
Showing 2 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.
China (TL) | |
| Chen Daiyan et al. (2001) |
North Macedonia | |
| EDS and PXRD analyzed by Joy Desor. |
Quick NavTopAbout LanmuchangiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsStrunz-MindatOther InformationInternet Links References Localities Locality List
Lanmuchang Tl deposit, Huijiabao gold field, Xingren County, Qianxinan, Guizhou, China