Guérinite
A valid IMA mineral species - grandfathered
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About Guérinite
Formula:
Ca6(HAsO4)3(AsO4)2 · 10.5H2O
Originally assumed to have formula Ca5(AsO4)2(HAsO4)2·9H2O (Catti & Ferraris, 1974).
Colour:
Colorless
Lustre:
Sub-Vitreous, Silky, Pearly
Hardness:
1½
Specific Gravity:
2.68 - 2.76
Crystal System:
Monoclinic
Name:
Named by Yevgeny I. Nefedov in 1961 for Henri Guérin [1906-1995], chemist at Paris-Sud University, Orsay, France, who synthesized the compound.
Unique Identifiers
Mindat ID:
1767
Long-form identifier:
mindat:1:1:1767:7
GUID
(UUID V4):
(UUID V4):
b82de0f2-584b-46c2-8c07-1c7b316f0ef4
IMA Classification of Guérinite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Ca5(AsO3OH)2(AsO4)2 · 9H2O
Classification of Guérinite
8.CJ.75
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
39.2.2.2
39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
2 : (AB)5[HXO4]2[XO4]2.xH2O
39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
2 : (AB)5[HXO4]2[XO4]2.xH2O
20.2.11
20 : Arsenates (also arsenates with phosphate, but without other anions)
2 : Arsenates of Be, Mg, Ca or Ba
20 : Arsenates (also arsenates with phosphate, but without other anions)
2 : Arsenates of Be, Mg, Ca or Ba
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 |
|---|---|---|
| Gué | 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 Guérinite
Sub-Vitreous, Silky, Pearly
Transparency:
Transparent, Translucent
Colour:
Colorless
Streak:
White
Hardness:
1½ on Mohs scale
Tenacity:
Brittle
Density:
2.68 - 2.76 g/cm3 (Measured) 2.74 g/cm3 (Calculated)
Comment:
Acta Cryst. B (1974) 30:1789 structure
Optical Data of Guérinite
Type:
Biaxial (-)
RI values:
nα = 1.574 - 1.576 nβ = 1.582 nγ = 1.582 - 1.584
2V:
Measured: 7° to 5°
Birefringence:
0.008
Max Birefringence:
δ = 0.008
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:
Moderate
Dispersion:
r > v strong, also r < v
Optical Extinction:
Z=elongation
Pleochroism:
Non-pleochroic
Chemistry of Guérinite
Mindat Formula:
Ca6(HAsO4)3(AsO4)2 · 10.5H2O
Originally assumed to have formula Ca5(AsO4)2(HAsO4)2·9H2O (Catti & Ferraris, 1974).
Originally assumed to have formula Ca5(AsO4)2(HAsO4)2·9H2O (Catti & Ferraris, 1974).
Elements listed:
Crystallography of Guérinite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 17.631(2) Å, b = 6.731(1) Å, c = 23.388(3) Å
β = 90.69(1)°
β = 90.69(1)°
Ratio:
a:b:c = 2.619 : 1 : 3.475
Unit Cell V:
2,775.35 ų (Calculated from Unit Cell)
Comment:
Space-group setting P21/n. For synthetic material, Catti & Ferraris give: P21/n, a 17.63(1), b 6.734(3), c 23.47(2) Å, β 90.6(1)°.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 14.0 Å | (100) |
| 11.7 Å | (40) |
| 8.7 Å | (30) |
| 4.84 Å | (40) |
| 3.89 Å | (80) |
| 3.49 Å | (60) |
| 3.01 Å | (80) |
| 2.90 Å | (80) |
Comments:
ICDD 26-1055
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] |
Type Occurrence of Guérinite
Geological Setting of Type Material:
Post-mine
Other Language Names for Guérinite
Common Associates
Associated Minerals Based on Photo Data:
| 40 photos of Guérinite associated with Picropharmacolite | Ca4Mg(AsO4)2(HAsO4)2 · 11H2O |
| 25 photos of Guérinite associated with Erythrite | Co3(AsO4)2 · 8H2O |
| 23 photos of Guérinite associated with Sainfeldite | Ca5(AsO4)2(AsO3OH)2 · 4H2O |
| 8 photos of Guérinite associated with Realgar | As4S4 |
| 7 photos of Guérinite associated with Pharmacolite | Ca(HAsO4) · 2H2O |
| 7 photos of Guérinite associated with Weilite | Ca(HAsO4) |
| 6 photos of Guérinite associated with Calcite | CaCO3 |
| 4 photos of Guérinite associated with Rauenthalite | Ca3(AsO4)2 · 10H2O |
| 4 photos of Guérinite associated with Phaunouxite | Ca3(AsO4)2 · 11H2O |
| 4 photos of Guérinite associated with Orpiment | As2S3 |
Related Minerals - Strunz-mindat Grouping
| 8.CJ. | Sainfeldite | Ca5(AsO4)2(AsO3OH)2 · 4H2O |
| 8.CJ. | Caesiumpharmacosiderite | CsFe4[(AsO4)3(OH)4] · 4H2O |
| 8.CJ. | Jeankempite | Ca5(AsO4)2(HAsO4)2 · 7H2O |
| 8.CJ. | Airdite | Sr(V4+O)2(PO4)2 · 4H2O |
| 8.CJ. | Dobšináite | Ca2Ca(AsO4)2 · 2H2O |
| 8.CJ.05 | Stercorite | (NH4)Na(PO3OH) · 4H2O |
| 8.CJ.10 | Mundrabillaite | (NH4)2Ca(PO3OH)2 · H2O |
| 8.CJ.10 | Swaknoite | (NH4)2Ca(PO3OH)2 · H2O |
| 8.CJ.15 | Nabaphite | NaBaPO4 · 9H2O |
| 8.CJ.15 | Nastrophite | Na(Sr,Ba)PO4 · 9H2O |
| 8.CJ.20 | Haidingerite | CaHAsO4 · H2O |
| 8.CJ.25 | Vladimirite | Ca4(AsO4)2(AsO3OH) · 4H2O |
| 8.CJ.25 | Rhabdophane-(Y) | YPO4 · H2O |
| 8.CJ.27 | Churchite-(Dy) | (Dy,Sm,Gd,Nd)PO4 · 2H2O |
| 8.CJ.30 | Ferrarisite | Ca5(AsO4)2(HAsO4)2 · 9H2O |
| 8.CJ.35 | Machatschkiite | (Ca,Na)6(AsO4)(HAsO4)3(PO4,SO4) · 15H2O |
| 8.CJ.35 | Fulbrightite | Ca(VO)2(AsO4)2 · 4H2O |
| 8.CJ.40 | Phaunouxite | Ca3(AsO4)2 · 11H2O |
| 8.CJ.40 | Rauenthalite | Ca3(AsO4)2 · 10H2O |
| 8.CJ.45 | Brockite | (Ca,Th,Ce)PO4 · H2O |
| 8.CJ.45 | Grayite | (Th,Pb,Ca)(PO4) · H2O |
| 8.CJ.45 | Rhabdophane-(Ce) | Ce(PO4) · 0.6H2O |
| 8.CJ.45 | Rhabdophane-(La) | La(PO4) · H2O |
| 8.CJ.45 | Rhabdophane-(Nd) | Nd(PO4) · H2O |
| 8.CJ.45 | Tristramite | (Ca,U,Fe)(PO4,SO4) · 2H2O |
| 8.CJ.45 | Smirnovskite | (Th,Ca)PO4 · nH2O |
| 8.CJ.45 | Štěpite | U(AsO3OH)2 · 4H2O |
| 8.CJ.47 | Vysokýite | U4+[AsO2(OH)2]4 · 4H2O |
| 8.CJ.50 | Ardealite | Ca2(PO3OH)(SO4) · 4H2O |
| 8.CJ.50 | Brushite | Ca(PO3OH) · 2H2O |
| 8.CJ.50 | Churchite-(Y) | Y(PO4) · 2H2O |
| 8.CJ.50 | Pharmacolite | Ca(HAsO4) · 2H2O |
| 8.CJ.50 | Churchite-(Nd) | Nd(PO4) · 2H2O |
| 8.CJ.55 | Mcnearite | NaCa5(AsO4)(HAsO4)4 · 4H2O |
| 8.CJ.60 | Dorfmanite | Na2(PO3OH) · 2H2O |
| 8.CJ.65 | Sincosite | Ca(VO)2(PO4)2 · 5H2O |
| 8.CJ.65 | Bariosincosite | Ba(VO)2(PO4)2 · 4H2O |
| 8.CJ.70 | Catalanoite | Na2(PO3OH) · 8H2O |
| 8.CJ.85 | Ningyoite | (U,Ca,Ce)2(PO4)2 · 1-2H2O |
Fluorescence of Guérinite
Not fluorescent.
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 Guérinite
mindat.org URL:
https://www.mindat.org/min-1767.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Guérinite
Localities for Guérinite
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.
Canada | |
| Reiner Mielke 2015 |
Czech Republic | |
| Minerál 5/1995 +1 other reference |
| Lapis 2002 (7/8) |
| Sejkora (1994) |
France | |
| P&T N°23-24 et al. (Haut-Rhin) |
| Wittern +1 other reference |
| Bari (1982) | |
| This mine worked the same vein as Gabe ... +2 other references | |
| Wittern et al. (Cologne) +1 other reference |
| Josef Vajdak |
| Perroud (1989) |
| Cuchet (2000) | |
Germany | |
| Gröbner et al. (2005) |
| Walenta (1992) |
| Carsten Slotta collection |
| |
| Belendorff (2021) |
| Weiß (1990) |
| various collections (see photos) | |
| |
| Wittern (2001) |
| Stolze et al. (04/2021) |
| T. Witzke (1992) |
| Hajek (2010) |
| Bulletin de Minéralogie 87 (1964) +1 other reference |
Greece | |
| Rieck et al. (1999) +1 other reference |
| Liebhart et al. (2021) +2 other references | |
Japan | |
| OHNISHI et al. (2013) |
Morocco | |
| Favreau et al. (2006) |
| Favreau et al. (2006) | |
| Favreau et al. (2006) |
Slovakia | |
| Martin Števko-unpublished |
Switzerland | |
| Stalder et al. (1998) +1 other reference |
USA | |
| [Mineralogical Record - Vol 23 No. 2] |
| Dunning (1988) |
| - (2005) | |
| - (2005) | |
| - (2005) | |
| - (2005) | |
| Tony Nikischer |
| The Picking Table:22 (1) +1 other reference |
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Zálesí uranium deposit, Zálesí, Javorník, Jeseník District, Olomouc Region, Czech Republic