Weilite
A valid IMA mineral species
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About Weilite
Formula:
Ca(HAsO4)
Colour:
White
Lustre:
Waxy, Greasy, Dull
Specific Gravity:
3.48
Crystal System:
Triclinic
Name:
Named after René Weil (1901-1983), professor of mineralogy, University of Strasbourg (France).
Co-Type Localities:
Isostructural with:
White powdery surface alteration of haidingerite.
Unique Identifiers
Mindat ID:
4259
Long-form identifier:
mindat:1:1:4259:4
GUID
(UUID V4):
(UUID V4):
1d909ffd-dffb-4658-9fc6-db60b62fb2b3
IMA Classification of Weilite
Approved
IMA Formula:
Ca(AsO3OH)
Approval year:
1963
First published:
1963
Classification of Weilite
8.AD.10
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large cations
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large cations
Dana 7th ed.:
37.1.1.2
37.1.1.2
37 : ANHYDROUS ACID PHOSPHATES, ARSENATES AND VANADATES
1 : Miscellaneous
37 : ANHYDROUS ACID PHOSPHATES, ARSENATES AND VANADATES
1 : Miscellaneous
20.2.5
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 |
---|---|---|
Wei | 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 Weilite
Waxy, Greasy, Dull
Transparency:
Translucent
Comment:
may be affected by underlying mineral
Colour:
White
Streak:
White
Comment:
Fine-grained natures prevents measurement.
Tenacity:
Brittle
Fracture:
Irregular/Uneven
Density:
3.48 g/cm3 (Measured) 3.45 g/cm3 (Calculated)
Optical Data of Weilite
Type:
Biaxial (-)
RI values:
nα = 1.644 nγ = 1.688
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2V:
Measured: 81°
Birefringence:
0.044
Max Birefringence:
δ = 0.044
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:
relatively strong
Optical Extinction:
X ∧ {001} = 20°; Y ∧ {001} = 27°; Z ⊥ {001} = 34°.
Chemistry of Weilite
Mindat Formula:
Ca(HAsO4)
Elements listed:
Crystallography of Weilite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 7.059 Å, b = 6.891 Å, c = 7.201 Å
α = 97.43°, β = 103.55°, γ = 87.75°
α = 97.43°, β = 103.55°, γ = 87.75°
Ratio:
a:b:c = 1.024 : 1 : 1.045
Unit Cell V:
337.66 ų (Calculated from Unit Cell)
Z:
4
Comment:
AC (B) 26:403 (1970); also JCPDS 16-710 (synthetic)
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
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Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
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Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0009369 | Weilite | Ferraris G, Chiari G (1970) The crystal structure of CaHAsO4 (weilite) Acta Crystallographica B26 403-409 | 1970 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
4.55 Å | (60) |
3.48 Å | (50) |
3.43 Å | (100) |
3.22 Å | (50) |
3.05 Å | (100) |
2.79 Å | (70) |
2.60 Å | (50) |
2.29 Å | (60) |
Comments:
JCPDS 16-710 (synthyetic)
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] | |
Stage 10b: Anthropogenic minerals | <10 Ka |
55 : Anthropogenic mine minerals |
Type Occurrence of Weilite
Co-Type Localities:
General Appearance of Type Material:
Incrustrations or pseudomorphs after pharmacolite or haidingerite.
Place of Conservation of Type Material:
National School of Mines, Paris, France, 4073.
National Museum of Natural History, Washington, D.C., USA, R5543.
National Museum of Natural History, Washington, D.C., USA, R5543.
Geological Setting of Type Material:
Frequently post-mine and may be a coating on haidingerite or pharmacolite.
Associated Minerals at Type Locality:
Reference:
Herpin P., Pierrot R. (1963) La weilite, CaH(AsO4), un nouvel arseniate de calcium isomorphe de la monetite. Bulletin de la Société française de Minéralogie et de Cristallographie: 86: 368-372.
Synonyms of Weilite
Other Language Names for Weilite
Common Associates
Associated Minerals Based on Photo Data:
7 photos of Weilite associated with Picropharmacolite | Ca4Mg(AsO4)2(HAsO4)2 · 11H2O |
7 photos of Weilite associated with Guérinite | Ca6(HAsO4)3(AsO4)2 · 10.5H2O |
6 photos of Weilite associated with Orpiment | As2S3 |
5 photos of Weilite associated with Sainfeldite | Ca5(AsO4)2(AsO3OH)2 · 4H2O |
4 photos of Weilite associated with Realgar | As4S4 |
3 photos of Weilite associated with Pharmacolite | Ca(HAsO4) · 2H2O |
2 photos of Weilite associated with Ferrimolybdite | Fe2(MoO4)3 · nH2O |
2 photos of Weilite associated with Annabergite | Ni3(AsO4)2 · 8H2O |
1 photo of Weilite associated with Getchellite | AsSbS3 |
1 photo of Weilite associated with Erythrite | Co3(AsO4)2 · 8H2O |
Related Minerals - Strunz-mindat Grouping
8.AD. | Keplerite | Ca9(Ca0.5◻0.5)Mg(PO4)7 |
8.AD. | Deynekoite | Ca9Fe3+(PO4)7 |
8.AD. | Mazorite | Ba3(PO4)2 |
8.AD. | Monazite-(Gd) | Gd(PO4) |
8.AD.05 | Nahpoite | Na2(PO3OH) |
8.AD.10 | Monetite | Ca(PO3OH) |
8.AD.10 | Švenekite | Ca(H2AsO4)2 |
8.AD.15 | Archerite | (K,NH4)(H2PO4) |
8.AD.15 | Biphosphammite | NH4(H2PO4) |
8.AD.20 | Phosphammite | (NH4)2(PO3OH) |
8.AD.25 | Buchwaldite | NaCa(PO4) |
8.AD.30 | Schultenite | Pb(HAsO4) |
8.AD.35 | Chernovite-(Y) | Y(AsO4) |
8.AD.35 | Dreyerite | Bi(VO4) |
8.AD.35 | Wakefieldite-(Ce) | Ce(VO4) |
8.AD.35 | Wakefieldite-(Y) | Y(VO4) |
8.AD.35 | Xenotime-(Y) | Y(PO4) |
8.AD.35 | Chernovite-(Ce) | (Ce,Y)(AsO4) |
8.AD.35 | Pretulite | Sc(PO4) |
8.AD.35 | Xenotime-(Yb) | Yb(PO4) |
8.AD.35 | Wakefieldite-(La) | La(VO4) |
8.AD.35 | Wakefieldite-(Nd) | Nd(VO4) |
8.AD.35 | Xenotime-(Gd) | Gd(PO4) |
8.AD.40 | Pucherite | Bi(VO4) |
8.AD.45 | Ximengite | Bi(PO4) |
8.AD.50 | Gasparite-(Ce) | Ce(AsO4) |
8.AD.50 | Monazite-(Ce) | Ce(PO4) |
8.AD.50 | Monazite-(La) | La(PO4) |
8.AD.50 | Monazite-(Nd) | Nd(PO4) |
8.AD.50 | Rooseveltite | Bi(AsO4) |
8.AD.50 | Cheralite | CaTh(PO4)2 |
8.AD.50 | Monazite-(Sm) | Sm(PO4) |
8.AD.50 | UM2005-35-VO:CaFePSiTh | (Th,Ca)(VO4,SiO4,PO4) |
8.AD.50 | Gasparite-(La) | La(AsO4) |
8.AD.55 | Tetrarooseveltite | Bi(AsO4) |
8.AD.60 | Chursinite | [Hg2]2+Hg2+2[AsO4]2 |
8.AD.65 | Clinobisvanite | Bi(VO4) |
8.AD.70 | Gurimite | Ba3(VO4)2 |
8.AD.75 | Picaite | NaCa[AsO3OH][AsO2(OH)2] |
Fluorescence of Weilite
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 Weilite
mindat.org URL:
https://www.mindat.org/min-4259.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 Weilite
Reference List:
Localities for Weilite
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 | |
| Percival |
Chile | |
| XRD and Wet Chemical by Gerhard Möhn |
China | |
| Zhu et al. (2015) +1 other reference |
Czech Republic | |
| Lapis 2002 (7/8) |
| Pauliš |
France | |
| P&T N°23-24 et al. (Haut-Rhin) |
| Wittern +2 other references |
Bari (1982) | |
This mine worked the same vein as Gabe ... +2 other references | |
Germany (TL) | |
| P. Herpin & R. Pierrot (1963) |
| Walenta (1992) |
| |
| Walenta (1992) |
| Weiß (1990) |
P Haas collection | |
| T. Witzke (1992) |
| P. Herpin & R. Pierrot (1963) |
| Wittern (2001) |
| Haake et al. (1994) |
Morocco | |
| Favreau et al. (2006) |
Switzerland | |
| Stalder et al. (1998) +1 other reference |
UK | |
| A.W.G.Kingsbury probable fraud |
USA | |
| Travis Olds collection |
| Mineralogical Society of America - ... |
Castor et al. (2004) | |
Bowell et al. (2005) +1 other reference | |
- (2005) | |
- (2005) | |
- (2005) |
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Wittichen, Schenkenzell, Rottweil, Freiburg Region, Baden-Württemberg, Germany