Chiluite
A valid IMA mineral species
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Formula:
Bi3Te6+Mo6+O10.5
Colour:
Yellow
Hardness:
3
Specific Gravity:
3.65
Crystal System:
Hexagonal
Name:
Named for the type locality, Chilu molybdenum deposit.
Type Locality:
This page provides mineralogical data about Chiluite.
Unique Identifiers
Mindat ID:
1004
Long-form identifier:
mindat:1:1:1004:3
GUID
(UUID V4):
(UUID V4):
40cc8240-fffe-4b9d-a5d3-284f93aa56a8
IMA Classification of Chiluite
Approved
IMA Formula:
Bi3Te6+Mo6+O10.5
First published:
1989
Classification of Chiluite
7.BD.55
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
D : With only large cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
D : With only large cations
7.11.13.1
7 : MULTIPLE OXIDES
11 : Miscellaneous
7 : MULTIPLE OXIDES
11 : Miscellaneous
7.17.4
7 : Oxides and Hydroxides
17 : Oxides of Se and Te
7 : Oxides and Hydroxides
17 : Oxides of Se and Te
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 |
---|---|---|
Cil | 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 Chiluite
Transparency:
Translucent
Colour:
Yellow
Hardness:
3 on Mohs scale
Hardness:
VHN10=108 kg/mm2 - Vickers
Density:
3.65 g/cm3 (Measured) 3.67 g/cm3 (Calculated)
Optical Data of Chiluite
Type:
Uniaxial (-)
RI values:
nω = 2.400(1) nε = 2.300(1)
Max Birefringence:
δ = 0.100
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
Anisotropism:
Weak
Bireflectance:
None
Optical Extinction:
Parallel extinction
Reflectivity:
Wavelength | R1 | R2 |
---|---|---|
410nm | 19.45% | 20.75% |
430nm | 19.25% | 20.45% |
450nm | 18.80% | 20.00% |
470nm | 18.40% | 19.50% |
490nm | 18.00% | 18.90% |
510nm | 17.75% | 18.60% |
530nm | 17.50% | 18.40% |
550nm | 17.25% | 18.25% |
570nm | 17.00% | 18.05% |
590nm | 16.75% | 17.80% |
610nm | 16.65% | 17.60% |
630nm | 16.50% | 17.40% |
650nm | 16.45% | 17.30% |
670nm | 16.30% | 17.20% |
690nm | 16.15% | 17.00% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 20.75%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Gray
Internal Reflections:
Gray-brown
Comments:
Negative elongation.
Chemistry of Chiluite
Mindat Formula:
Bi3Te6+Mo6+O10.5
Elements listed:
Crystallography of Chiluite
Crystal System:
Hexagonal
Cell Parameters:
a = 8.97 Å, c = 12.2 Å
Ratio:
a:c = 1 : 1.36
Unit Cell V:
850.11 ų (Calculated from Unit Cell)
Z:
1
Comment:
Point Group: 622, 6/m, or 6.; Space Group: P6322, P63m, or P63.
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.30 Å | (100) |
3.05 Å | (90) |
2.51 Å | (50 |
2.06 Å | (50) |
1.655 Å | (50) |
2.88 Å | (40) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Near-surface Processes | |
23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
High-𝑇 alteration and/or metamorphism | |
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Chiluite
General Appearance of Type Material:
Plumose replacements in joseite inclusions in bismuthinite; as veinlets and as irregular to hexagonal isolated grains isolated in bismuthinite; as a rim on koechlinite, the exterior having a hexagonal outline. Grain size generally 10-20 µm (maximum 42 µm).
Place of Conservation of Type Material:
National Museum for Geology, Beijing, China, number M09636.
Geological Setting of Type Material:
In quartz veins in a bismuth deposit.
Associated Minerals at Type Locality:
Reference:
Yang Xiuzhen, Li Deren, Wang Guanxin, Deng Mengxiang, Chen Nansheng, and Wang Shuzhen (1989): A study of chiluite - A new mineral found in Chilu, Fujian, China. Acta Mineralogica Sinica 9(1), 9-14 (in Chinese with English abstract).
Synonyms of Chiluite
Other Language Names for Chiluite
Related Minerals - Strunz-mindat Grouping
7.BD. | Adanite | Pb2(Te4+O3)(SO4) |
7.BD. | Hasanovite | KNa(MoO2)(SO4)2 |
7.BD. | Evanichite | Pb6Cr3+(Cr6+O4)2(SO4)(OH)7FCl |
7.BD. | Kennygayite | [Pb4O2(OH)2](SO4) |
7.BD.05 | Sulphohalite | Na6(SO4)2FCl |
7.BD.10 | Galeite | Na15(SO4)5F4Cl |
7.BD.10 | Schairerite | Na21(SO4)7ClF6 |
7.BD.15 | Kogarkoite | Na3(SO4)F |
7.BD.20 | Caracolite | Na3Pb2(SO4)3Cl |
7.BD.20 | Cesanite | Na3Ca2(SO4)3(OH) |
7.BD.20 | Aiolosite | Na4Bi(SO4)3Cl |
7.BD.25 | Burkeite | Na6(CO3)(SO4)2 |
7.BD.30 | Hanksite | Na22K(SO4)9(CO3)2Cl |
7.BD.35 | Cannonite | Bi2(SO4)O(OH)2 |
7.BD.40 | Lanarkite | Pb2(SO4)O |
7.BD.45 | Grandreefite | Pb2(SO4)F2 |
7.BD.50 | Itoite | Pb3Ge4+(SO4)2O2(OH)2 |
7.BD.60 | Hectorfloresite | Na9(SO4)4(IO3) |
7.BD.65 | Pseudograndreefite | Pb6(SO4)F10 |
7.BD.70 | Sundiusite | Pb10(SO4)O8Cl2 |
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 Chiluite
mindat.org URL:
https://www.mindat.org/min-1004.html
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References for Chiluite
Reference List:
Localities for Chiluite
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.
China (TL) | |
| Yang Xiuzhen et al. (1989) |
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