Fluckite
A valid IMA mineral species
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About Fluckite
Pierre Fluck
Formula:
CaMn2+(AsO3OH)2 · 2H2O
Colour:
colorless, pale pink, pale rose red
Lustre:
Sub-Vitreous, Waxy
Hardness:
3½ - 4
Crystal System:
Triclinic
Name:
Named in 1980 by Hubert Bari, Fabien Cesbron, François Permingeat, and Francois Pillard in honor of the mineralogist Pierre Fluck [b. October 29, 1947], Louis Pasteur University, Strasbourg, and later Universite de Haute-Alsace, France, who discovered the first specimen of the species.
This page provides mineralogical data about Fluckite.
Unique Identifiers
Mindat ID:
1564
Long-form identifier:
mindat:1:1:1564:2
Similar Names
| Flaggite | A valid IMA mineral species | Pb4Cu42+Te26+(SO4)2O11(OH)2(H2O) |
| Luckite | A synonym of 'Manganese-bearing Melanterite' |
IMA Classification of Fluckite
Approved
IMA Formula:
CaMn2+(As5+O3OH)2·2H2O
Approval year:
1978
First published:
1980
Approval history:
IMA1978-054
Classification of Fluckite
8.CG.
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
G : With large and medium-sized cations, RO4:H2O = 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
G : With large and medium-sized cations, RO4:H2O = 1:1
39.1.2.1
39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
1 : A[HXO4]·xH2O
39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
1 : A[HXO4]·xH2O
20.8.13
20 : Arsenates (also arsenates with phosphate, but without other anions)
8 : Arsenates of Mn
20 : Arsenates (also arsenates with phosphate, but without other anions)
8 : Arsenates of Mn
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 for Standard |
|---|---|---|
| Fck | 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 Fluckite
Sub-Vitreous, Waxy
Transparency:
Transparent, Translucent
Colour:
Colorless, pale pink, pale rose red
Streak:
White
Hardness:
3½ - 4 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{010| perfect, {100} good; {101} poor.
{010| perfect, {100} good; {101} poor.
Optical Data of Fluckite
Type:
Biaxial
RI values:
nα = 1.618 nβ = 1.627 nγ = 1.642
Birefringence:
0.024
Max. Birefringence:
δ = 0.024
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Dispersion:
r > v
Pleochroism:
Non-pleochroic
Comments:
2V = large.
Chemistry of Fluckite
Mindat Formula:
CaMn2+(AsO3OH)2 · 2H2O
Element Weights:
Crystallography of Fluckite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 8.459 Å, b = 7.613 Å, c = 6.968 Å
α = 82.21°, β = 98.25°, γ = 95.86°
α = 82.21°, β = 98.25°, γ = 95.86°
Ratio:
a:b:c = 1.111 : 1 : 0.915
Unit Cell V:
438.42 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Acicular, occasionally slender rod-like to prismatic. Dominant forms on type material are {100}, {110}, and {010}.
Comment:
Bull Min 103:129 (1980) structure
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0012068 | Fluckite | Catti M, Chiari G, Ferraris G (1980) Fluckite, CaMn(HAsO4)2*2H2O, a structure related by pseudo-polytypism to krautite MnHAsO4*H2O Bulletin de Mineralogie 103 129-134 | 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 |
|---|---|
| 8.32 Å | (50) |
| 7.51 Å | (100) |
| 3.77 Å | (60) |
| 3.53 Å | (90) |
| 3.27 Å | (90) |
| 2.98 Å | (80) |
| 2.69 Å | (60) |
| 2.67 Å | (50) |
Comments:
ICDD 33-290; 34-161.
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 Fluckite
General Appearance of Type Material:
Radiating prismatic crystals.
Place of Conservation of Type Material:
Muséum Nationale d’Histoire Naturelle, Paris, France (cotype).
Natural History Museum, London, United Kingdom, BM 1979,431 (cotype).
Ecole Nationale Supérieure des Mines, Paris, France, 54532, 54539 (cotype).
Musée Minéralogique, Sainte-Marie-aux-Mines, France (cotype).
Natural History Museum, London, United Kingdom, BM 1979,431 (cotype).
Ecole Nationale Supérieure des Mines, Paris, France, 54532, 54539 (cotype).
Musée Minéralogique, Sainte-Marie-aux-Mines, France (cotype).
Associated Minerals at Type Locality:
Synonyms of Fluckite
Other Language Names for Fluckite
Common Associates
Associations Based on Photo Data:
| 3 photos of Fluckite associated with Pharmacolite | Ca(HAsO4) · 2H2O |
| 2 photos of Fluckite associated with Calcite | CaCO3 |
| 2 photos of Fluckite associated with Friedelite | Mn2+8Si6O15(OH,Cl)10 |
| 2 photos of Fluckite associated with Willemite | Zn2SiO4 |
Related Minerals - Strunz-mindat Grouping
| 8.CG. | Dondoellite | Ca2Fe(PO4)2 · 2H2O |
| 8.CG. | 'Ca-Huréaulite' | CaMn5(PO4)4 · 4H2O |
| 8.CG. | Alumolukrahnite | Ca[CuAl](AsO4)2(H2O,OH)2 |
| 8.CG.05 | Parabrandtite | Ca2Mn2+(AsO4)2 · 2H2O |
| 8.CG.05 | Talmessite | Ca2Mg(AsO4)2 · 2H2O |
| 8.CG.05 | Collinsite | Ca2Mg(PO4)2 · 2H2O |
| 8.CG.05 | Messelite | Ca2Fe2+(PO4)2 · 2H2O |
| 8.CG.05 | Gaitite | Ca2Zn(AsO4)2 · 2H2O |
| 8.CG.05 | Anorthoroselite | Ca2Co(AsO4)2 · 2H2O |
| 8.CG.05 | Cassidyite | Ca2Ni(PO4)2 · 2H2O |
| 8.CG.05 | Fairfieldite | Ca2Mn2+(PO4)2 · 2H2O |
| 8.CG.05 | Hillite | Ca2Zn(PO4)2 · 2H2O |
| 8.CG.05 | 'Unnamed (Fe2+-analogue of Parabrandtite)' | Ca2Fe2+(AsO4)2 · 2H2O |
| 8.CG.10 | Zincroselite | Ca2Zn(AsO4)2 · 2H2O |
| 8.CG.10 | Roselite | Ca2Co(AsO4)2 · 2H2O |
| 8.CG.10 | Rruffite | Ca2Cu(AsO4)2 · 2H2O |
| 8.CG.10 | Wendwilsonite | Ca2Mg(AsO4)2 · 2H2O |
| 8.CG.10 | Brandtite | Ca2Mn2+(AsO4)2 · 2H2O |
| 8.CG.10 | 'Unnamed (Fe2+-analogue of Brandtite)' | Ca2Fe2+(AsO4)2 · 2H2O |
| 8.CG.15 | Mawbyite | PbFe3+2(AsO4)2(OH)2 |
| 8.CG.15 | Thometzekite | PbCu2+2(AsO4)2 · 2H2O |
| 8.CG.15 | Yancowinnaite | PbCuAl(AsO4)2OH · H2O |
| 8.CG.15 | Schneebergite | BiCo2(AsO4)2(OH) · H2O |
| 8.CG.15 | Cabalzarite | CaMg2(AsO4)2 · 2H2O |
| 8.CG.15 | Nickelschneebergite | BiNi2(AsO4)2(OH) · H2O |
| 8.CG.15 | Lotharmeyerite | CaZn2(AsO4)2 · 2H2O |
| 8.CG.15 | Nickeltsumcorite | Pb(Ni,Fe3+)2(AsO4)2(H2O,OH)2 |
| 8.CG.15 | Magnesiofluckite | CaMg(AsO3OH)2(H2O)2 |
| 8.CG.15 | Krettnichite | PbMn3+2(VO4)2(OH)2 |
| 8.CG.15 | Cobalttsumcorite | PbCo2(AsO4)2 · 2H2O |
| 8.CG.15 | Manganlotharmeyerite | CaMn3+2(AsO4)2(OH)2 |
| 8.CG.15 | Tsumcorite | PbZn2(AsO4)2 · 2H2O |
| 8.CG.15 | Ferrilotharmeyerite | CaZnFe3+(AsO4)2(OH) · H2O |
| 8.CG.15 | Cobaltlotharmeyerite | CaCo2(AsO4)2 · 2H2O |
| 8.CG.15 | Mounanaite | PbFe3+2(VO4)2(OH)2 |
| 8.CG.15 | Nickellotharmeyerite | CaNi2(AsO4)2 · 2H2O |
| 8.CG.20 | Lukrahnite | CaCuFe3+(AsO4)2(OH,H2O)2 |
| 8.CG.20 | Helmutwinklerite | PbZn2(AsO4)2 · 2H2O |
| 8.CG.20 | Phosphogartrellite | PbCuFe3+(PO4)2(OH,H2O)2 |
| 8.CG.20 | Gartrellite | PbCuFe3+(AsO4)2(OH) · H2O |
| 8.CG.20 | Zincgartrellite | PbZn2(AsO4)2(H2O,OH)2 |
| 8.CG.20 | Rappoldite | PbCo2(AsO4)2 · 2H2O |
| 8.CG.25 | Pottsite | (Pb3xBi4-2x)(VO4)4 · H2O (0.8 < x < 1.0) |
| 8.CG.25 | Armellinoite-(Ce) | Ca4Ce4+(AsO4)4 · H2O |
| 8.CG.35 | Nickeltalmessite | Ca2Ni(AsO4)2 · 2H2O |
| 8.CG.55 | Irhtemite | Ca4Mg(AsO4)2(HAsO4)2 · 4H2O |
Fluorescence of Fluckite
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 Fluckite
mindat.org URL:
https://www.mindat.org/min-1564.html
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References for Fluckite
Reference List:
Bari, Hubert, Cesbron, Fabien, Permingeat, François, Pillard, François (1980) La fluckite, arséniate hydraté de calcium et manganèse CaMnH2(AsO4)2·2H2O, une nouvelle espèce minérale. Bulletin de Minéralogie, 103 (1) 122-128 doi:10.3406/bulmi.1980.7384
Catti, Michele, Chiari, Giacomo, Ferraris, Giovanni (1980) Fluckite, CaMn(HAsO4)2 • 2 H2O, a structure related by pseudo-polytypism to krautite MnHAsO4 • H2O. Bulletin de Minéralogie, 103 (1). 129-134 doi:10.3406/bulmi.1980.7385
Fleischer, M., Cabri, L. J., Chao, G. Y., Pabst, A. (1980) New mineral names. American Mineralogist, 65 (9-10). 1065-1070
Localities for Fluckite
Showing 6 localities.
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.
Czech Republic | |
| Hloušek et al. (2002) |
France | |
| Bari (1982) |
| Bull.Min. (1980) +1 other reference |
| Bari (1982) | |
| This mine worked the same vein as Gabe ... +2 other references | |
USA | |
| MinRec 19:274 +2 other references |
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Giftgrube mine, Saint Jacques vein, Neuenberg, Sainte-Marie-aux-Mines, Colmar-Ribeauvillé, Haut-Rhin, Grand Est, France