Ferrarisite
A valid IMA mineral species
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About Ferrarisite
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.
Type Locality:
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.
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.
Unique Identifiers
Mindat ID:
1485
Long-form identifier:
mindat:1:1:1485:0
GUID
(UUID V4):
(UUID V4):
836c8301-c56b-4402-aa4f-f37ba90998ae
IMA Classification of Ferrarisite
Approved
IMA Formula:
Ca5(AsO3OH)2(AsO4)2 · 9H2O
Classification of Ferrarisite
8.CJ.30
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
39.2.3.1
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
20.2.12
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 |
|---|---|---|
| Fer | 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 Ferrarisite
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
{001} perfect
Density:
2.63 g/cm3 (Measured) 2.60 g/cm3 (Calculated)
Optical Data of Ferrarisite
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.
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
Chemistry of Ferrarisite
Mindat Formula:
Ca5(AsO4)2(HAsO4)2 · 9H2O
Elements listed:
Crystallography of Ferrarisite
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°
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
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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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) |
|---|---|---|---|---|---|---|---|
| 0012071 | Ferrarisite | Catti M, Chiari G, Ferraris G (1980) The structure of ferrarisite, Ca5(HAsO4)2(AsO4)2*9H2O: disorder, hydrogen bonding, and polymorphism with guerinite Bulletin de Mineralogie 103 541-546 | 1980 | Sainte Marie-aux-Mines, Alsace, France | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 10.8 Å | (100) |
| 6.34 Å | (30) |
| 5.36 Å | (30) |
| 4.73 Å | (30) |
| 4.07 Å | (40) |
| 3.57 Å | (40) |
| 3.17 Å | (80) |
| 2.83 Å | (90) |
Comments:
ICDD 33-280
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 Ferrarisite
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 Ferrarisite
Other Language Names for Ferrarisite
Common Associates
Associated Minerals Based on Photo Data:
| 1 photo of Ferrarisite associated with Realgar | As4S4 |
| 1 photo of Ferrarisite associated with Picropharmacolite | Ca4Mg(AsO4)2(HAsO4)2 · 11H2O |
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.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.75 | Guérinite | Ca6(HAsO4)3(AsO4)2 · 10.5H2O |
| 8.CJ.85 | Ningyoite | (U,Ca,Ce)2(PO4)2 · 1-2H2O |
Fluorescence of Ferrarisite
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 Ferrarisite
mindat.org URL:
https://www.mindat.org/min-1485.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Ferrarisite
Reference List:
Localities for Ferrarisite
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.
France | |
| P&T N°23-24 et al. (Haut-Rhin) |
| Bari: Lapis 6/1983 +1 other reference |
| Bari (1982) | |
| This mine worked the same vein as Gabe ... +2 other references | |
| Perroud (1989) |
Germany | |
| |
| Walenta (1992) |
| see locality page |
| Weiß (1990) |
| Weiß (1990) | |
| |
| XRD and EDS Analysis Thomas Witzke |
Greece | |
| Rieck et al. (2020) |
| Rieck et al. (2020) |
Japan | |
| OHNISHI et al. (2013) |
Switzerland | |
| Stalder et al. (1998) +1 other reference |
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Gabe Gottes Mine, Sankt Jakob vein, Neuenberg, Sainte-Marie-aux-Mines, Colmar-Ribeauvillé, Haut-Rhin, Grand Est, France