Mindat Logo

Weilite

This page is currently not sponsored. Click here to sponsor this page.



Formula:
Ca(HAsO
 
4
)
System:TriclinicColour:White
Name:Named after René Weil (b. 1901), professor of mineralogy, University of Strasbourg (France).
Isostructural with:Monetite


White powdery surface alteration of haidingerite.

Classification of Weilite

IMA status:Approved 1963
Strunz 8th edition ID:7/A.12-20
Nickel-Strunz 10th (pending) edition ID:8.AD.10

8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large cations
Dana 7th edition ID:37.1.1.2
Dana 8th edition ID:37.1.1.2

37 : ANHYDROUS ACID PHOSPHATES, ARSENATES AND VANADATES
1 : Miscellaneous
Hey's CIM Ref.:20.2.5

20 : Arsenates (also arsenates with phosphate, but without other anions)
2 : Arsenates of Be, Mg, Ca or Ba
mindat.org URL:http://www.mindat.org/min-4259.html
Please feel free to link to this page.

Type Occurrence of Weilite

Co-type Localities:Gabe Gottes Mine (incl. Giftgrube), Ste Marie-aux-Mines (Markirch), Haut-Rhin, Alsace, France
Wittichen, Schenkenzell, Black Forest, Baden-Württemberg, Germany
Schneeberg District, Erzgebirge, Saxony, Germany
Year of Discovery:1963
Geological Setting of type material:Frequently post-mine and may be a coating on haidingerite or pharmacolite.

Physical Properties of Weilite

Lustre:Waxy, Greasy, Dull
Diaphaneity (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 (measured):3.48 g/cm3
Density (calculated):3.45 g/cm3

Crystallography of Weilite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Space Group Setting:P1
Cell Parameters:a = 7.059Å, b = 6.891Å, c = 7.201Å
α = 97.43°, β = 103.55°, γ = 87.75°
Ratio:a:b:c = 1.024 : 1 : 1.045
Unit Cell Volume:V 337.66 ų (Calculated from Unit Cell)
Z:4
Comment:AC (B) 26:403 (1970); also JCPDS 16-710 (synthetic)
X-Ray Powder Diffraction:
d-spacingIntensity
4.55 (60)
3.48 (50)
3.43 (100)
3.22 (50)
3.05 (100)
2.79 (70)
2.60 (50)
2.29 (60)
Comments:JCPDS 16-710 (synthyetic)

Optical Data of Weilite

Type:Biaxial (-)
RI values: nα = 1.644 nγ = 1.688
2V:Measured: 81°
Birefringence:0.044
Maximum Birefringence:δ = 0.044

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:relatively strong
Optical Extinction:X ^ {001} = 20 degrees; Y ^ {001} = 27 degrees; Z perpendicular to {001} = 34 degrees.

Chemical Properties of Weilite

Formula:
Ca(HAsO
 
4
)
Simplified for copy/paste:Ca(HAsO4)
Essential elements:As, Ca, H, O
All elements listed in formula:As, Ca, H, O

Relationship of Weilite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.AD.05Nahpoite
Na
 
2
HPO
 
4
8.AD.10Monetite
Ca(HPO
 
4
)
8.AD.10Švenekite
Ca(H
 
2
AsO
 
4
)
 
2
8.AD.15Archerite
(K,NH
 
4
)(H
 
2
PO
 
4
)
8.AD.15Biphosphammite
(NH
 
4
,K)(H
 
2
PO
 
4
)
8.AD.20Phosphammite
(NH
 
4
)
 
2
(HPO
 
4
)
8.AD.25Buchwaldite
NaCa(PO
 
4
)
8.AD.30Schultenite
Pb(HAsO
 
4
)
8.AD.35Chernovite-(Y)
Y(AsO
 
4
)
8.AD.35Dreyerite
Bi(VO
 
4
)
8.AD.35Wakefieldite-(Ce)
Ce(VO
 
4
)
8.AD.35Wakefieldite-(Y)
Y(VO
 
4
)
8.AD.35Xenotime-(Y)
Y(PO
 
4
)
8.AD.35Pretulite
Sc(PO
 
4
)
8.AD.35Xenotime-(Yb)
(Yb,Y,HREE)(PO
 
4
)
8.AD.35Wakefieldite-(La)
La(VO
 
4
)
8.AD.40Pucherite
Bi(VO
 
4
)
8.AD.45Ximengite
Bi(PO
 
4
)
8.AD.50Gasparite-(Ce)
(Ce,REE)(AsO
 
4
)
8.AD.50Monazite-(Ce)
(Ce,La,Nd,Th)(PO
 
4
)
8.AD.50Monazite-(La)
(La,Ce,Nd)(PO
 
4
)
8.AD.50Monazite-(Nd)
(Nd,La,Ce)(PO
 
4
)
8.AD.50Rooseveltite
Bi(AsO
 
4
)
8.AD.50Cheralite
(Ca,Ce)(Th,Ce)(PO
 
4
)
 
2
8.AD.50Monazite-(Sm)
(Sm,Gd,Ce,Th)(PO
 
4
)
8.AD.50UM2005-35-VO:CaFePSiTh
(Th,Ca)(VO
 
4
,SiO
 
4
,PO
 
4
)
8.AD.55Tetrarooseveltite
Bi(AsO
 
4
)
8.AD.60Chursinite
(Hg
+
2
)
 
0.5
Hg
2+
 
(AsO
 
4
)
8.AD.65Clinobisvanite
Bi(VO
 
4
)
Related Minerals - Hey's Index Grouping:

- +
20.2.1Bearsite
Be
 
2
(AsO
 
4
)(OH) · 4H
 
2
O
20.2.2Brassite
Mg(HAsO
 
4
) · 4H
 
2
O
20.2.3Rösslerite
Mg(HAsO
 
4
) · 7H
 
2
O
20.2.4Hörnesite
Mg
 
3
(AsO
 
4
)
 
2
· 8H
 
2
O
20.2.6Johnbaumite
Ca
 
5
(AsO
 
4
)
 
3
OH
20.2.7Haidingerite
CaHAsO
 
4
· H
 
2
O
20.2.8Pharmacolite
Ca(HAsO
 
4
) · 2H
 
2
O
20.2.9Sainfeldite
CaCa
 
2
Ca
 
2
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
· 4H
 
2
O
20.2.10Vladimirite
Ca
 
4
(AsO
 
4
)
 
2
(AsO
 
3
OH) · 4H
 
2
O
20.2.11Guérinite
Ca
 
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
· 9H
 
2
O
20.2.12Ferrarisite
Ca
 
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
· 9H
 
2
O
20.2.13Rauenthalite
Ca
 
3
(AsO
 
4
)
 
2
· 10H
 
2
O
20.2.14Phaunouxite
Ca
 
3
(AsO
 
4
)
 
2
· 11H
 
2
O
20.2.15Mcnearite
NaCa
 
5
(AsO
 
4
)(HAsO
 
4
)
 
4
· 4H
 
2
O
20.2.16Bergslagite
CaBeAsO
 
4
(OH)
20.2.17Adelite
CaMg(AsO
 
4
)(OH)
20.2.18Talmessite
Ca
 
2
Mg(AsO
 
4
)
 
2
· 2H
 
2
O
20.2.19Irhtemite
Ca
 
4
Mg(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
· 4H
 
2
O
20.2.20Camgasite
CaMg(AsO
 
4
)(OH) · 5H
 
2
O
20.2.21Picropharmacolite
Ca
 
4
Mg(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
· 11H
 
2
O
20.2.22Bariopharmacosiderite
Ba
 
0.5
Fe
3+
4
(AsO
 
4
)
 
3
(OH)
 
4
· 5H
 
2
O
Related Minerals - Dana Grouping):

- +
37.1.1.1Monetite
Ca(HPO
 
4
)

Other Names for Weilite

Synonyms:
IMA1963-006
Other Languages:
German:Weilit
Russian:Вейлит
Spanish:Weilita

Other Information

Fluorescence in UV light:Not fluorescent.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Weilite

Reference List:

- +
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.

American Mineralogist (1964): 49: 816.

Abbona F., Ferraris G. (1970), Contributo alla conoscenza di minerali arsenicali; nota II: ricerche sulla disidratazione della weilite, della haidingerite e della pharmacolite. Periodico di mineralogia – Roma, 183-204.

Acta Crystallographica: B26: 403-410.

Internet Links for Weilite

Search Engines:
  • Look for Weilite on Google
  • Look for Weilite images on Google
  • External Links:
  • Look for Weilite on Webmineral
  • Look for Weilite on Athena Mineralogy
  • Look for Weilite on Wikipedia
  • Look for Weilite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Weilite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • Fine minerals from bisbeeborn.com
  • Buy from David K Joyce minerals
  • Fine and rare minerals from mintreasure.com
  • SpiriferMinerals.com - high quality low prices
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Weilite specimens for sale - minfind.com
  • Find Weilite on www.crystalclassics.co.uk
  • Search for Weilite on Well-Arranged Molecules
  • Buy from McDougall Minerals
  • Wilensky Fine Minerals
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Buy minerals from YourMineralCollection
  • Localities for Weilite

    The 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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Belgium
     
    • Luxembourg Province
      • Stavelot Massif
        • Vielsalm
          • Grand Halleux
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Karlovy Vary Region
        • Krušné Hory Mts (Erzgebirge)
          • Jáchymov District (St Joachimsthal)
    Lapis 2002(7/8), 63-65
      • Ústí Region
        • Krušné Hory Mts (Erzgebirge)
          • Klášterec nad Ohří
    Pauliš, P., Civiš, S., Smutný, Z.: Weilit z Měděnce v Krušných horách. Minerál, 2011, roč. 19, č. 3, s. 217-219.
    France
     
    • Alsace
      • Haut-Rhin
        • Ste Marie-aux-Mines (Markirch)
    Wittern, Journée: "Mineralien finden in den Vogesen", von Loga (Cologne), 1997
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Schenkenzell
    P. Herpin & R. Pierrot (1963): La weilite, CaH(AsO4), un nouvel arseniate de calcium isomorphe de la monetite.- Bull. Soc. franc. Miner. Crist. 86, 368-372
            • Böckelsbach valley
    Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
            • Burgfelsen
    No reference listed
            • Heubach Valley
    K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
    • Hesse
      • Richelsdorf District
        • Bauhaus
    P Haas collection
        • Süss
          • Richelsdorf Smelter
    S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1992
    • Saxony
      • Erzgebirge
        • Marienberg District
          • Wolkenstein
    Haake, R., Flach, S., Bode, R. (1994): Mineralien und Fundstellen Deutschland, Teil 2, S.71-75.
        • Schlema-Hartenstein District
    T. Witzke (1992) Mineralien-Welt 3(6), 16-18
    P. Herpin & R. Pierrot (1963): La weilite, CaH(AsO4), un nouvel arseniate de calcium isomorphe de la monetite.- Bull. Soc. franc. Miner. Crist. 86, 368-372
          • Neustädtel
    Wittern: "Mineralfundorte in Deutschland", 2001
    Morocco
     
    • Souss-Massa-Draâ Region
      • Ouarzazate Province
        • Tazenakht
          • Bou Azer District (Bou Azzer District)
            • Bou Azer
    Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
    Switzerland
     
    • Wallis (Valais)
      • Anniviers Valley
        • Ayer
    Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 378.; Ansermet, S. (2012): Mines et minéraux du Valais - II. Anniviers et Tourtemagne. With contributions by N. Meisser, Ed. Porte-plumes (Ayer)
    UK
     
    • England
      • Cumbria
        • North and Western Region (Cumberland)
          • Threlkeld District
            • St John's in the Vale
    BMS Database
    USA
     
    • Nevada
      • Humboldt Co.
        • Osgood Mts
          • Potosi District
            • Adam Peak
    Handbook of Mineralogy
    NBMG Spec. Pub. 31 Minerals of Nevada
        • Potosi District
          • Adam Peak
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia
    Mineral and/or Locality  
    Search Google  
    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
    Current server date and time: July 19, 2014 09:00:00
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds