Clearcreekite
A valid IMA mineral species
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Formula:
[Hg2]2+3[CO3]2(OH)2 · 4H2O
Colour:
Pale greenish yellow
Lustre:
Vitreous
Specific Gravity:
6.96 (Calculated)
Crystal System:
Monoclinic
Name:
Named for the type locality Clear Creek, California, USA.
Dimorph of:
This page provides mineralogical data about Clearcreekite.
Unique Identifiers
Mindat ID:
7073
Long-form identifier:
mindat:1:1:7073:3
IMA Classification of Clearcreekite
Approved
IMA Formula:
Hg1+3(CO3)(OH)·2H2O
Approval year:
1999
First published:
2001
Type description reference:
Roberts, Andrew C., Groat, L. A., Raudsepp, M., Ercit, T. Scott, Erd, R. C., Moffatt, E. A., Stirling, John A.R. (2001) Clearcreekite, a new polymorph of Hg1+3(CO3)(OH) · 2H2O, from the Clear Creek claim, San Benito County, California. The Canadian Mineralogist, 39 (3) 779-784 doi:10.2113/gscanmin.39.3.779
Classification of Clearcreekite
5.DC.30
5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
C : With large cations
5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
C : With 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 |
|---|---|---|
| Cck | 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 Clearcreekite
Vitreous
Transparency:
Transparent
Colour:
Pale greenish yellow
Streak:
Pale greenish yellow
Comment:
Soft
Tenacity:
Brittle
Cleavage:
Distinct/Good
{001} good
{001} good
Density:
6.96 g/cm3 (Calculated)
Optical Data of Clearcreekite
Type:
Biaxial
RI values:
n = 2.06 - 2.12
Max. Birefringence:
δ = 0.000
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:
Very High
Dispersion:
r > v strong
Chemistry of Clearcreekite
Mindat Formula:
[Hg2]2+3[CO3]2(OH)2 · 4H2O
Element Weights:
Elements listed:
Crystallography of Clearcreekite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 6.760(4) Å, b = 9.580(4) Å, c = 10.931(4) Å
β = 105.53(5)°
β = 105.53(5)°
Ratio:
a:b:c = 0.706 : 1 : 1.141
Unit Cell V:
682.06 ų (Calculated from Unit Cell)
Z:
4
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.831 Å | (100) |
| 2.767 Å | (100) |
| 4.62 Å | (90) |
| 7.09 Å | (70) |
| 5.32 Å | (40) |
| 2.391 Å | (40) |
| 5.40 Å | (30) |
Reference:
Roberts, Andrew C., Groat, L. A., Raudsepp, M., Ercit, T. Scott, Erd, R. C., Moffatt, E. A., Stirling, John A.R. (2001) Clearcreekite, a new polymorph of Hg1+3(CO3)(OH) · 2H2O, from the Clear Creek claim, San Benito County, California. The Canadian Mineralogist, 39 (3) 779-784 doi:10.2113/gscanmin.39.3.779
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47c : [Carbonates, phosphates, borates, nitrates] |
Type Occurrence of Clearcreekite
General Appearance of Type Material:
A single cluster of crystals - only one specimen know for type description.
Place of Conservation of Type Material:
Systematic Reference Series of the National Mineral Collection at the Geological Survey of Canada, Ottawa, under catalogue number NMCC 68074.
Associated Minerals at Type Locality:
Reference:
Roberts, Andrew C., Groat, L. A., Raudsepp, M., Ercit, T. Scott, Erd, R. C., Moffatt, E. A., Stirling, John A.R. (2001) Clearcreekite, a new polymorph of Hg1+3(CO3)(OH) · 2H2O, from the Clear Creek claim, San Benito County, California. The Canadian Mineralogist, 39 (3) 779-784 doi:10.2113/gscanmin.39.3.779
Synonyms of Clearcreekite
Other Language Names for Clearcreekite
Dutch:Clearcreekiet
German:Clearcreekit
Simplified Chinese:单斜羟碳汞石
Spanish:Clearcreekita
Traditional Chinese:單斜羥碳汞石
Related Minerals - Strunz-mindat Grouping
| 5.DC. | Gysinite-(Ce) | PbCe(CO3)2(OH) · H2O |
| 5.DC. | Calcioancylite-(La) | (LaCa)(CO3)2(OH) · H2O |
| 5.DC. | Gysinite-(La) | PbLa(CO3)2(OH) · H2O |
| 5.DC.05 | Kozoite-(La) | La(CO3)(OH) |
| 5.DC.05 | Calcioancylite-(Ce) | (Ce,Ca,Sr)CO3(OH,H2O) |
| 5.DC.05 | Calcioancylite-(Nd) | Ca(Nd,La,Ce)(CO3)2(OH).H2O |
| 5.DC.05 | 'Unnamed (Ce-analogue of Kozoite-(La) and -(Nd))' | (Ce,La)(CO3)(OH) |
| 5.DC.05 | Ancylite-(La) | LaSr(CO3)2(OH) · H2O |
| 5.DC.05 | Ancylite-(Ce) | CeSr(CO3)2(OH) · H2O |
| 5.DC.05 | Kozoite-(Nd) | Nd(CO3)(OH) |
| 5.DC.05 | Gysinite-(Nd) | PbNd(CO3)2(OH) · H2O |
| 5.DC.10 | Kamphaugite-(Y) | Ca(Y,REE)(CO3)2(OH) · H2O |
| 5.DC.15 | Sheldrickite | NaCa3(CO3)2F3 · H2O |
| 5.DC.20 | Thomasclarkite-(Y) | (Na,Ce)(Y,REE)(HCO3)(OH)3 · 4H2O |
| 5.DC.25 | Peterbaylissite | [Hg2]2+3[CO3]2(OH)2 · 4H2O |
| 5.DC.35 | Niveolanite | NaBe(CO3)(OH) · 2H2O |
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 Clearcreekite
mindat.org URL:
https://www.mindat.org/min-7073.html
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Please feel free to link to this page.
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References for Clearcreekite
Reference List:
Roberts, Andrew C., Groat, L. A., Raudsepp, M., Ercit, T. Scott, Erd, R. C., Moffatt, E. A., Stirling, John A.R. (2001) Clearcreekite, a new polymorph of Hg1+3(CO3)(OH) · 2H2O, from the Clear Creek claim, San Benito County, California. The Canadian Mineralogist, 39 (3) 779-784 doi:10.2113/gscanmin.39.3.779
Localities for Clearcreekite
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) | |
| Roberts et al. (2001) +1 other reference |
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