Sheldrickite (original) (raw)
A valid IMA mineral species
About SheldrickiteHide
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Formula:
NaCa3(CO3)2F3 · H2O
Colour:
Colourless to white
Name:
Named in honor of George Michael Sheldrick (b 1942), Professor of Crystallography University of Gottingen, Germany. Sheldrick is the creator of computer programs widely used for the analysis of crystal structures. Determination of the structure of this mineral required the software's capability of handling twinned crystals.
This page provides mineralogical data about Sheldrickite.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:7289:8
ed0c7515-67c3-47a6-8f03-3ef889ba9e14
IMA Classification of SheldrickiteHide
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Type description reference:
Classification of SheldrickiteHide
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5.DC.15
5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
C : With large cations
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Sdk | 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 SheldrickiteHide
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Transparency:
Transparent, Translucent
Colour:
Colourless to white
Fracture:
Irregular/Uneven
Density:
2.86 g/cm3 (Measured) 2.86 g/cm3 (Calculated)
Comment:
Measured by displacement in toluene
Optical Data of SheldrickiteHide
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RI values:
_n_ω = 1.538 _n_ε = 1.563
δ = 0.025
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Chemistry of SheldrickiteHide
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Mindat Formula:
NaCa3(CO3)2F3 · H2O
Crystallography of SheldrickiteHide
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Class (H-M):
3 - Pyramidal
Cell Parameters:
a = 6.718 Å, c = 15.050 Å
Twinning:
By reflection on {001}
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0005522 | Sheldrickite | Grice J D, Gault R A, Van Velthuizen J (1997) Sheldrickite, a new sodium-calcium-fluorocarbonate mineral species from Mont Saint-Hilaire, Quebec The Canadian Mineralogist 35 181-187 |  |
1997 | Mont Saint-Hilaire, Quebec, Canada | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.809 Å | (30) |
| 5.010 Å | (30) |
| 3.358 Å | (30) |
| 2.791 Å | (50) |
| 2.508 Å | (40) |
| 2.010 Å | (100) |
| 1.939 Å | (40) |
Geological EnvironmentHide
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Type Occurrence of SheldrickiteHide
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Place of Conservation of Type Material:
Canadian Museum of Nature, nos. CMNMI 81530, CMNMI 81537, CMNMI 81538 and CMNMI 8153
Geological Setting of Type Material:
Late-stage hydrothermal infilling in a Marble xenolith in nepheline syenite, close to a large unit of hornfels.
Associated Minerals at Type Locality:
Reference:
Grice, J.D., Gault, R.A., Van Velthuizen, J. (1997) Sheldrickite, a new sodium-calcium-fluorocarbonate mineral species from Mont Saint-Hilaire, Quebec. Canadian Mineralogist: 35: 181-187.
Synonyms of SheldrickiteHide
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Other Language Names for SheldrickiteHide
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Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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| 5.DC. | Gysinite-(Ce) | PbCe(CO3)2(OH) · H2O | Orth. m m m _(_2/_m_2/_m_2/m ) |
|---|---|---|---|
| 5.DC. | Calcioancylite-(La) | (LaCa)(CO3)2(OH) · H2O | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 5.DC. | Gysinite-(La) | PbLa(CO3)2(OH) · H2O | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 5.DC.05 | Kozoite-(La) | (La,Nd)(CO3)(OH) | Orth. m _m_2 |
| 5.DC.05 | Calcioancylite-(Ce) | (Ce,Ca,Sr)CO3(OH,H2O) | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 5.DC.05 | Calcioancylite-(Nd) | Ca(Nd,La,Ce)(CO3)2(OH).H2O | Mon. m : P m |
| 5.DC.05 | Unnamed (Ce-analogue of Kozoite-(La) and -(Nd)) | (Ce,La)(CO3)(OH) | Orth. |
| 5.DC.05 | Ancylite-(La) | LaSr(CO3)2(OH) · H2O | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 5.DC.05 | Unnamed (La-analogue of Calcioancylite-(Ce)) | (La,Ce,Nd,Ca,Sr)CO3(OH,H2O) | Orth. |
| 5.DC.05 | Ancylite-(Ce) | CeSr(CO3)2(OH) · H2O | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 5.DC.05 | Kozoite-(Nd) | (Nd,La,Sm,Pr)(CO3)(OH) | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 5.DC.05 | Gysinite-(Nd) | PbNd(CO3)2(OH) · H2O | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 5.DC.10 | Kamphaugite-(Y) | Ca(Y,REE)(CO3)2(OH) · H2O | Tet. 422 : _P_41212 |
| 5.DC.20 | Thomasclarkite-(Y) | (Na,Ce)(Y,REE)(HCO3)(OH)3 · 4H2O | Mon. 2 : _P_2 |
| 5.DC.25 | Peterbaylissite | [Hg2]2+3[CO3]2(OH)2 · 4H2O | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 5.DC.30 | Clearcreekite | [Hg2]2+3[CO3]2(OH)2 · 4H2O | Mon. 2/m : _P_21/b |
| 5.DC.35 | Niveolanite | NaBe(CO3)(OH) · 2H2O | Tet. 4/m m m _(_4/_m_2/_m_2/m ) : _P_4/m c c |
Fluorescence of SheldrickiteHide
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Other InformationHide
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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 SheldrickiteHide
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References for SheldrickiteHide
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Localities for SheldrickiteHide
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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
Locality ListHide
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- 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.
| Canada (TL) | |
|---|---|
| Québec Montérégie La Vallée-du-Richelieu RCM Mont Saint-Hilaire ⓘ Poudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; Carrière Mont Saint-Hilaire; MSH) (TL) | Grice et al. (1997) |