Xitieshanite
A valid IMA mineral species
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About Xitieshanite
Formula:
Fe3+(SO4)Cl · 6H2O
Colour:
Bright green, yellowish tint
Lustre:
Vitreous
Hardness:
2½
Specific Gravity:
1.99
Crystal System:
Monoclinic
Member of:
Name:
Named after its discovery locality, the Xitieshan Pb-Zn deposit, Qinghai Province, China.
This page provides mineralogical data about Xitieshanite.
Unique Identifiers
Mindat ID:
4341
Long-form identifier:
mindat:1:1:4341:6
GUID
(UUID V4):
(UUID V4):
f50f9d66-4186-462a-8947-1226a5668c57
IMA Classification of Xitieshanite
Approved
First published:
1982
Classification of Xitieshanite
7.DC.20
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
C : With only medium-sized cations; chains of edge-sharing octahedra
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
C : With only medium-sized cations; chains of edge-sharing octahedra
31.9.6.3
31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
9 : (AB)(XO4)Zq·xH2O
31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
9 : (AB)(XO4)Zq·xH2O
26.28
26 : Sulphates with Halide
26 : Sulphates with Halide
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 |
---|---|---|
Xit | 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 Xitieshanite
Vitreous
Transparency:
Translucent
Colour:
Bright green, yellowish tint
Streak:
Yellow
Hardness:
2½ on Mohs scale
Hardness:
VHN100=62.6 - Vickers
Cleavage:
Imperfect/Fair
Fracture:
Irregular/Uneven, Conchoidal
Density:
1.99 g/cm3 (Measured) 2.02 g/cm3 (Calculated)
Optical Data of Xitieshanite
Type:
Biaxial (+)
RI values:
nα = 1.536 nβ = 1.570 nγ = 1.628
2V:
Measured: 77° , Calculated: 78°
Max Birefringence:
δ = 0.092
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:
Low
Dispersion:
r < v strong
Optical Extinction:
Extinction parallel or inclined, elongation positive or negative.
Pleochroism:
Strong
Comments:
X = colourless to pale yellow tint; Y = pale yellow; Z = light yellow with greenish tint.
Chemistry of Xitieshanite
Mindat Formula:
Fe3+(SO4)Cl · 6H2O
Crystallography of Xitieshanite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/a
Cell Parameters:
a = 14.102 Å, b = 6.908 Å, c = 10.673 Å
β = 111.26°
β = 111.26°
Ratio:
a:b:c = 2.041 : 1 : 1.545
Unit Cell V:
968.97 ų (Calculated from Unit Cell)
Z:
4
Crystal Structure
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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) |
---|---|---|---|---|---|---|---|
0019142 | Xitieshanite | Jingliang Z, Li J, Wei D (1988) The crystal structure of xitieshanite Kexue Tongbao 33 502-505 | 1988 | Xitieshan, Quinghai Province, China | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
4.96 Å | (100) |
4.81 Å | (100) |
3.90 Å | (90) |
6.67 Å | (60) |
6.09 Å | (50) |
5.69 Å | (50) |
5.44 Å | (50) |
Comments:
Xitieshan mine, China. Data from the type description.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
45a : [Sulfates, arsenates, selenates, antimonates] | |
47a : [Near-surface hydration of prior minerals] | |
47b : [Sulfates and sulfites] | |
Stage 10b: Anthropogenic minerals | <10 Ka |
54 : Coal and other mine fire minerals (see also #51 and #56) |
Type Occurrence of Xitieshanite
General Appearance of Type Material:
Rhombic rectangular crystals or massive aggregates up to 2 x 2 cm.
Place of Conservation of Type Material:
Institute of Geochemistry, Guiyang; Museum of Geology, Beijing, China.
Geological Setting of Type Material:
Oxidation zone of a lead-zinc deposit.
Associated Minerals at Type Locality:
Reference:
Li Xilin, Zhou Jingliang, and Li Jiaju (1982): Xitieshanite - A new ferric sulfate mineral. Acta Mineralogica Sinica 2(4), 241-247
Other Language Names for Xitieshanite
German:Xitieshanit
Spanish:Xitieshanita
Relationship of Xitieshanite to other Species
Related Minerals - Strunz-mindat Grouping
7.DC.05 | Aluminite | Al2(SO4)(OH)4 · 7H2O |
7.DC.05 | Meta-aluminite | Al2(SO4)(OH)4 · 5H2O |
7.DC.10 | Butlerite | Fe3+(SO4)(OH) · 2H2O |
7.DC.10 | Parabutlerite | Fe3+(SO4)(OH) · 2H2O |
7.DC.15 | Fibroferrite | Fe3+(SO4)(OH) · 5H2O |
7.DC.25 | Botryogen | MgFe3+(SO4)2(OH) · 7H2O |
7.DC.25 | Zincobotryogen | (Zn,Mg,Mn2+)Fe3+(SO4)2(OH) · 7H2O |
7.DC.30 | Chaidamuite | ZnFe3+(SO4)2(OH) · 4H2O |
7.DC.30 | Guildite | CuFe3+(SO4)2(OH) · 4H2O |
7.DC.40 | Pauladamsite | Cu4(SeO3)(SO4)(OH)4 · 2H2O |
7.DC.45 | Riotintoite | Al(SO4)(OH) · 3H2O |
7.DC.50 | Thorneite | Pb6(Te6+2O10)(CO3)Cl2(H2O) |
7.DC.55 | Vendidaite | Al2(SO4)(OH)3Cl · 6H2O |
Other Information
Thermal Behaviour:
DTA curve shows strong endothermic peaks at 85° and 170°C (dehydration), a weak endothermic peak at 460°C (loss of OH), and a strong endothermic peak at 735°C (loss of SO3).
Notes:
Soluble in cold water or dilute acids.
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 Xitieshanite
mindat.org URL:
https://www.mindat.org/min-4341.html
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Please feel free to link to this page.
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References for Xitieshanite
Reference List:
Localities for Xitieshanite
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.
Bulgaria | |
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Chile | |
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China (TL) | |
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USA | |
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Unnamed Cu mine [1], Mejillones peninsula, Mejillones, Antofagasta Province, Antofagasta, Chile