Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on Mindat
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralSearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Ferrarisite

This page is currently not sponsored. Click here to sponsor this page.
Professor Giovanni Ferraris
Formula:
Ca5(AsO4)2(HAsO4)2 · 9H2O
Colour:
Colorless to white
Lustre:
Sub-Vitreous, Silky
Specific Gravity:
2.63
Crystal System:
Triclinic
Name:
Named in honour of professor Giovanni Ferraris (1937- ), Institute of Mineralogy, Crystallography and Geochemistry, University of Turin, Italy, who worked on crystal structure of several arsenate minerals from Sainte-Marie-aux-Mines, France.
Dimorph of:
Ferrarisite dehydrates very slowly in dry air at room temperature and turns from colourless to white; dehydrated crystals were also found in nature in Sainte Marie aux Mines and in Wittichen (Catti & Ivaldi, 1981). Fresh ferrarisite is visually very similar to pharmacolite.

A triclinic compound with the formula Ca5(AsO4)2(HAsO4).2.5H2O (Unnamed (Ca arsenate hydrate)) was obtained by dehydration at 60°C of ferrarisite (Catti & Ivaldi, 1981).

A closely related mineral is vladimirite.


Hide all sections | Show all sections

Classification of FerrarisiteHide

Approved
8.CJ.30

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
39.2.3.1

39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
2 : (AB)5[HXO4]2[XO4]2.xH2O
20.2.12

20 : Arsenates (also arsenates with phosphate, but without other anions)
2 : Arsenates of Be, Mg, Ca or Ba

Physical Properties of FerrarisiteHide

Sub-Vitreous, Silky
Transparency:
Transparent, Translucent
Colour:
Colorless to white
Comment:
White mineral may be dehydrated to unspecified minerals
Streak:
White
Tenacity:
Brittle
Cleavage:
Perfect
{001} perfect
Density:
2.63 g/cm3 (Measured)    2.60 g/cm3 (Calculated)

Optical Data of FerrarisiteHide

Type:
Biaxial (+)
RI values:
nα = 1.562 nβ = 1.572 nγ = 1.585
2V:
Measured: 83° , Calculated: 84°
Birefringence:
0.023
Max Birefringence:
δ = 0.023
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
strong
Optical Extinction:
X ^ c = 8°-17°; Z perpendicular to {110}
Pleochroism:
Non-pleochroic

Chemical Properties of FerrarisiteHide

Formula:
Ca5(AsO4)2(HAsO4)2 · 9H2O
IMA Formula:
Ca5(AsO3OH)2(AsO4)2 · 9H2O

Crystallography of FerrarisiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 8.294 Å, b = 6.722 Å, c = 11.198 Å
α = 106.16°, β = 92.94°, γ = 99.20°
Ratio:
a:b:c = 1.234 : 1 : 1.666
Unit Cell V:
588.90 ų (Calculated from Unit Cell)
Z:
1
Comment:
Bull Min. (1980): 103:541 structure

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
10.8 (100)
6.34 (30)
5.36 (30)
4.73 (30)
4.07 (40)
3.57 (40)
3.17 (80)
2.83 (90)
Comments:
ICDD 33-280

Type Occurrence of FerrarisiteHide

General Appearance of Type Material:
White radiating very elongated crystals.
Geological Setting of Type Material:
Oxidized vein assemblages in arsenic-rich mines
Associated Minerals at Type Locality:

Synonyms of FerrarisiteHide

Other Language Names for FerrarisiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Realgar1 photo of Ferrarisite associated with Realgar on mindat.org.
Picropharmacolite1 photo of Ferrarisite associated with Picropharmacolite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.CJ.05StercoriteNa(NH4)HPO4 · 4H2OTric.
8.CJ.10Mundrabillaite(NH4)2Ca(HPO4)2 · H2OMon. m : Pm
8.CJ.10Swaknoite(NH4)2Ca(HPO4)2 · H2OOrth.
8.CJ.15NabaphiteNaBaPO4 · 9H2OIso.
8.CJ.15NastrophiteNa(Sr,Ba)PO4 · 9H2O
8.CJ.20HaidingeriteCaHAsO4 · H2OOrth. mmm (2/m 2/m 2/m) : Pbcn
8.CJ.25VladimiriteCa4(AsO4)2(AsO3OH) · 4H2OMon. 2/m : P21/b
8.CJ.35Machatschkiite(Ca,Na)6(AsO4)(HAsO4)3(PO4,SO4) · 15H2OHex.
8.CJ.40PhaunouxiteCa3(AsO4)2 · 11H2OTric.
8.CJ.40RauenthaliteCa3(AsO4)2 · 10H2OTric. 1 : P1
8.CJ.45Brockite(Ca,Th,Ce)PO4 · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Grayite(Th,Pb,Ca)(PO4) · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Rhabdophane-(Ce)(Ce,La)(PO4) · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Rhabdophane-(La)(La,Ce)(PO4) · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Rhabdophane-(Nd)(Nd,Ce,La)(PO4) · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Tristramite(Ca,U,Fe)(PO4,SO4) · 2H2OHex.
8.CJ.45SmirnovskiteCaTh(PO4)2 · nH2OHex. 6 2 2 : P62 2 2
8.CJ.50ArdealiteCa2(HPO4)(SO4) · 4H2OMon. m : Bb
8.CJ.50BrushiteCa(HPO4) · 2H2OMon. 2/m : B2/b
8.CJ.50Churchite-(Y)Y(PO4) · 2H2OMon. 2/m : B2/b
8.CJ.50PharmacoliteCa(HAsO4) · 2H2OMon. m
8.CJ.50Churchite-(Nd)Nd(PO4) · 2H2OMon.
8.CJ.55McneariteNaCa5(AsO4)(HAsO4)4 · 4H2OTric.
8.CJ.60DorfmaniteNa2HPO4 · 2H2OOrth.
8.CJ.65SincositeCa(VO)2(PO4)2 · 5H2OTet. 4/mmm (4/m 2/m 2/m) : P42/nnm
8.CJ.65BariosincositeBa(VO)2(PO4)2 · 4H2OTet.
8.CJ.70CatalanoiteNa2(HPO4) · 8H2OOrth. mmm (2/m 2/m 2/m) : Ibca
8.CJ.75GuériniteCa5(AsO4)2(HAsO4)2 · 9H2OMon. 2/m : P21/b
8.CJ.85NingyoiteCaU(PO4)2 · 1-2H2OOrth.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

20.2.1BearsiteBe2(AsO4)(OH) · 4H2OMon.
20.2.2BrassiteMg(HAsO4) · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
20.2.3RößleriteMg(HAsO4) · 7H2OMon. 2/m : B2/b
20.2.4HörnesiteMg3(AsO4)2 · 8H2OMon. 2/m : B2/m
20.2.5WeiliteCa(HAsO4)Tric. 1 : P1
20.2.6JohnbaumiteCa5(AsO4)3OHHex. 6/m : P63/m
20.2.7HaidingeriteCaHAsO4 · H2OOrth. mmm (2/m 2/m 2/m) : Pbcn
20.2.8PharmacoliteCa(HAsO4) · 2H2OMon. m
20.2.9SainfelditeCaCa2Ca2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
20.2.10VladimiriteCa4(AsO4)2(AsO3OH) · 4H2OMon. 2/m : P21/b
20.2.11GuériniteCa5(AsO4)2(HAsO4)2 · 9H2OMon. 2/m : P21/b
20.2.13RauenthaliteCa3(AsO4)2 · 10H2OTric. 1 : P1
20.2.14PhaunouxiteCa3(AsO4)2 · 11H2OTric.
20.2.15McneariteNaCa5(AsO4)(HAsO4)4 · 4H2OTric.
20.2.16BergslagiteCaBeAsO4(OH)Mon. 2/m : P21/b
20.2.17AdeliteCaMg(AsO4)(OH)Orth. 2 2 2 : P21 21 21
20.2.18TalmessiteCa2Mg(AsO4)2 · 2H2OTric.
20.2.19IrhtemiteCa4Mg(AsO4)2(HAsO4)2 · 4H2OMon.
20.2.20CamgasiteCaMg(AsO4)(OH) · 5H2OMon. 2/m : P21/m
20.2.21PicropharmacoliteCa4Mg(AsO4)2(HAsO4)2 · 11H2OTric. 1 : P1
20.2.22BariopharmacosideriteBa0.5Fe3+4(AsO4)3(OH)4 · 5H2OTet. 4 2m : P4 2m

Fluorescence of FerrarisiteHide

Not fluorescent.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for FerrarisiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Bulletin de Mineralogie (1980): 103: 533-540.
Bulletin de Mineralogie (1980): 103: 541-546, structure.
American Mineralogist (1981): 66: 637.
Catti, M. & Ivaldi, G. (1981) Mechanism of the reaction Ca5H2(AsO4)4•9H2O (ferrarisite) -> Ca5H2(AsO4)4•5H2O (dimorph of vladimirite) and structure of the latter phase. Z. Kristallogr., 157, 119-130.

Internet Links for FerrarisiteHide

Localities for FerrarisiteHide

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

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
France
 
  • Grand Est
    • Haut-Rhin
      • Ste Marie-aux-Mines (Markirch)
P&T N°23-24, H. BARI 1982, Minéralogie des filons du Neuenberg à Sainte Marie aux Mines (Haut-Rhin).
          • Sankt Jakob vein
Bari, H., Permingeat, F., Pierrot, R., Walenta, K. (1980): La ferrarisite Ca5H2(AsO4)4.9H2O, une nouvelle espèce minérale dimorphe de la guérinite. Bulletin de Minéralogie 103, 533-540 (in French). [Type locality is the Giftgrube (p. 539)]; Bari: Lapis 6/1983
P&T N°23-24, H. BARI 1982, Minéralogie des filons du Neuenberg à Sainte Marie aux Mines (Haut-Rhin).
  • Provence-Alpes-Côte d'Azur
    • Alpes-Maritimes
      • Duranus
Perroud, P. (1989). "Les minéraux de Duranus." Le Cristallier Suisse, 8(5),pp:216-230
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Schenkenzell
        • Wittichen
          • Burgfelsen
No reference listed
          • Heubach Valley
K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
  • Bavaria
    • Franconia
      • Spessart
        • Hösbach
          • Sailauf
            • Hartkoppe
see locality page
  • Hesse
    • Richelsdorf District
      • Bauhaus
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Nentershausen
        • Süß
          • Richelsdorf Smelter
S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1992
  • North Rhine-Westphalia
    • Sauerland
      • Meschede
        • Ramsbeck
No reference listed
Japan
 
  • Kyushu Region
    • Oita prefecture
      • Saiki City
        • Kiura mine (Shin-Kiura mine; Kiura emery mine)
Masayuki Ohnishi, Norimasa Shimobayashi, Shigetomo Kishi, Mitsuo Tanabe, Shoichi Kobayashi (2013) Talmessite from the Uriya deposit at the Kiura mining area, Oita Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 108, No. 2 (April), 116-120.
Switzerland
 
  • Wallis (Valais)
    • Anniviers Valley
      • Ayer
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 161.; Ansermet, S. (2012): Mines et minéraux du Valais - II. Anniviers et Tourtemagne. With contributions by N. Meisser, Ed. Porte-plumes (Ayer)
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2017, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: September 23, 2017 10:12:58 Page generated: September 18, 2017 16:00:20
Go to top of page