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:
39 photos of Guérinite associated with Picropharmacolite | Ca4Mg(AsO4)2(HAsO4)2 · 11H2O |
24 photos of Guérinite associated with Erythrite | Co3(AsO4)2 · 8H2O |
20 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
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.
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