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{{Infobox mineral
{{Infobox mineral
| name = '''Fluckite'''
| name = Fluckite
| category = [[Arsenate mineral]]
| category = [[Arsenate minerals]]
| boxwidth =
| boxwidth =
| boxbgcolor =
| boxbgcolor =
| image = Fluckite (Sainte-Marie-aux-Mines)-Musée de minéralogie de Strasbourg.jpg
⚫
| image =
| imagesize =
| imagesize = 260px
| caption =
| caption = Fluckite from the Gabe-Gottes Mine
| formula = CaMnH<sub>2</sub>(AsO<sub>4</sub>)<sub> 2</sub>·2H<sub>2</sub>O <ref name=mindat/>
| formula = CaMnH<sub>2</sub>(AsO<sub>4</sub>)<sub>2</sub>·2(H<sub>2</sub>O) <ref name=mindat/>
| IMAsymbol = Fck<ref>{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|journal=Mineralogical Magazine|volume=85|issue=3|pages=291–320|doi=10.1180/mgm.2021.43|bibcode=2021MinM...85..291W|s2cid=235729616|doi-access=free}}</ref>
⚫
| symmetry = [[Triclinic]]
| unit cell =
| molweight =
| molweight =
| strunz = 8.CB.15
⚫
| system = [[Triclinic]]
| class = Pinacoidal ({{overline|1}}) <br/><small>(same [[H-M symbol]])</small>
| symmetry = ''P''{{overline|1}}
| unit cell = a = 8.459, b = 7.613 <br/>c = 6.968&nbsp;[Å]; α = 82.21° <br/>β = 98.25°, γ = 95.86°; Z&nbsp;=&nbsp;2
| color = Colorless, Light to Dark Pink
| color = Colorless, Light to Dark Pink
| habit = Crystals prismatic, typically radiating to spherulitic
| habit = Crystals prismatic, typically radiating to spherulitic
⚫
| system =
| twinning =
| twinning =
| cleavage = (010) Perfect, (100) Good, (101) Indistinct
| cleavage = (010) perfect, (100) good, (101) indistinct
| fracture =
| fracture =
| tenacity =
| tenacity =
| mohs = 3.5-4
| mohs = 3.5-4
| luster = glassy
| luster = Subvitreous, waxy
| refractive = n<sub>α</sub> = 1.618 n<sub>β</sub> = 1.627 n<sub>γ</sub>= 1.642
| refractive = translucent
| opticalprop = Biaxial (+), probable<br />α = 1.618 β = 1.627 γ= 1.642<br />2V(meas.)=Very large
| opticalprop = Biaxial (+), probable
⚫
| 2V = Large
| birefringence = 0.024
| birefringence = 0.024
| pleochroism =
| pleochroism =
| streak = white
| streak = White
| gravity =
| gravity = 3.05
| density = 3.05
| density =
| melt =
| melt =
| fusibility =
| fusibility =
| diagnostic =
| diagnostic =
| solubility =
| solubility =
| diaphaneity =
| diaphaneity = Translucent
| other =
| other =
| references = <ref name=mindat>http://www.mindat.org/min-1564.html</ref><ref> http://www.webmineral.com/data/Fluckite.shtml</ref><ref>http://www.mineralatlas.com/mineral%20general%20descriptions/F/fluckitepcd.htm</ref><ref>http://www.handbookofmineralogy.com/pdfs/fluckite.pdf </ref>
| references = <ref name=mindat>[http://www.mindat.org/min-1564.html Fluckite: mindat.org]</ref><ref name=webmineral>[http://www.webmineral.com/data/Fluckite.shtml Fluckite: webmineral.com]</ref><ref>{{usurped|1=[https://web.archive.org/web/20080829234331/http://www.mineralatlas.com/mineral%20general%20descriptions/F/fluckitepcd.htm Fluckite: Mineral Atlas]}}</ref><ref name=HBM>[http://www.handbookofmineralogy.com/pdfs/fluckite.pdf Fluckite: Handbook of Mineralogy]</ref>
}}
}}
⚫
'''Fluckite''' is an [[arsenate mineral]] with the chemical formula CaMnH<sub>2</sub>(AsO<sub>4</sub>)<sub>2</sub>·2(H<sub>2</sub>O).<ref name=mindat/>
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Fluckite's mineral crystallography is [[triclinic]] meaning it has three axis of different length and three different interior angles that do not equal 90°. Because fluckite possesses three axes with different angles and lengths it is an anisotropic mineral. This means that it has more than one optic axis. This mineral is a member of the P{{overline|1}} space group meaning that it can be rotated 360° degrees and inverted to obtain the original figure. Optically, this mineral has positive biaxial [[birefringence]], which can be shown obtaining an [[interference figure]] that is blue in the upper right and lower left quadrants of the figure while looking down the c- axis. Fluckite possesses moderate [[optical relief]] which is the degree to which the mineral stands out from the mounting medium.<ref name=mindat/>


==Occurrence==
⚫
'''Fluckite''' is a mineral with the chemical formula CaMnH<sub>2</sub>(AsO<sub>4</sub>)<sub> 2</sub>·2H<sub>2</sub>O <ref name=Mindat>[http://www.mindat.org/min-1564.html Mindat website]. Accessed September 16, 2010.</ref>
Fluckite was first described in 1980 for an occurrence in the Gabe-Gottes Mine in [[Haut-Rhin]], [[Alsace]], France,<ref name=mindat/><ref name=Fleischer>M. Fleischer, L.J. Cabri, G.Y. Chao, and A. Pabst (1980) New Mineral Names*, American Mineralogist, 65,1065-1070.</ref> and named for [[mineralogist]] Pierre Fluck of [[Louis Pasteur University]] in Strasbourg, France.<ref name=webmineral /> The mineral was found in at a depth of {{convert|100|m|abbr=on}}. It occurs as a post-mine phase on [[Carbonate mineral|carbonate]] [[gangue]].<ref name=Fleischer/> It occurs in association with native arsenic, [[tennantite]], [[skutterudite]], [[sainfeldite]], [[pharmacolite]], [[villyaellenite]], [[picropharmacolite]], [[calcite]], [[dolomite (mineral)|dolomite]], [[ankerite]] and [[quartz]].<ref name=HBM/>

'''Fluckite''' is named after the minerologist Pierre Fluck of [[Louis Pasteur University]] in Strasbourg, France.<ref name=Webmineral>[http://webmineral.com/data/Fluckite.shtml webmineral website]. Accessed September 16, 2010.</ref>
'''Fluckite's''' mineral crystallography is triclinic meaning that it has three vectors of unequal length and three different interior angles that do not equal 90°.<ref>M. Fleischer, L.J. Cabri, G.Y. Chao, A. Pabst (1980) New Mineral Names*, American Mineralogist, 65,1065-1070.</ref> Because Fluckite possesses three axes with different angles and lengths it is an anisotropic mineral which allows light to pass through when exposed to lane polarized light. This mineral is a member of the P<math>\overline{1}</math> space group. Optically, this mineral forms biaxial positively birefringent crystals([[Birefringence]]). Positive biaxial birefringence describes behavior of light entering the mineral such that the light splits into two velocities based upon the index of refraction and the slow ray of the two bisects the acute angle formed by the optical axes.<ref>http://www.handbookofmineralogy.com/pdfs/fluckite.pdf</ref> Fluckite possesses moderate [[optical relief]] which is the degree to which the mineral stands out from the mounting medium.<ref>http://www.mindat.org/min-1564.html</ref> The mineral was found in the Gabe-Gottes Mine in france at 100m.<ref>M. Fleischer, L.J. Cabri, G.Y. Chao, A. Pabst (1980) New Mineral Names*, American Mineralogist, 65,1065-1070.</ref> The mineral contains [[Arsenic]] in the form of Arsenate HAsO<sub>4</sub> As(V). Arsenic has a myriad of uses "metallurgy, wood preservation, painting, medicine, pest control, and as an additive to chicken feed, where it increases growth," as well as a strong and common poison.<ref>L. R. Croal, J.A. Gralnick, D. Malasarn, D.K. Newman. (2004) The Genetics of Geochemistry*, Annual Review of Genetics, 38, 175-202.</ref> This form of arsenate is often found in groundwater from deep wells and is a toxic substance.


==References==
==References==
{{Reflist}}
{{Reflist}}
{{Refbegin}}
*M. Fleischer, L.J. Cabri, G.Y. Chao, A. Pabst (1980) New Mineral Names*, American Mineralogist, 65,1065-1070.
*L. R. Croal, J.A. Gralnick, D. Malasarn, D.K. Newman. (2004) The Genetics of Geochemistry*, Annual Review of Genetics, 38, 175-202.
*Y. T. He, A. G. Fitzmaurice, A. Bilgin, S. Choi, P. O’Day, J. Horst, J. Harrington, H. J. Reisinger, D. R. Burris J. G. Hering (2010) Geochemical processes controlling arsenic mobility in groundwater; a case study of arsenic mobilization and natural attenuation*, Applied geochemistry 25(1), 69.
{{Refend}}


[[Category:Arsenate minerals]]
[[Category:Arsenate minerals]]
[[Category:Calcium minerals]]
[[Category:Calcium minerals]]
[[Category:Manganese minerals]]
[[Category:Manganese(II) minerals]]
[[Category:Triclinic minerals]]
[[Category:Triclinic minerals]]
[[Category:Minerals in space group 2]]

Latest revision as of 16:51, 22 September 2024

Fluckite
Fluckite from the Gabe-Gottes Mine
General
CategoryArsenate minerals
Formula
(repeating unit)		CaMnH2(AsO4)2·2(H2O) [1]
IMA symbolFck[2]
Strunz classification8.CB.15
Crystal systemTriclinic
Crystal classPinacoidal (1)
(same H-M symbol)
Space groupP1
Unit cella = 8.459, b = 7.613
c = 6.968 [Å]; α = 82.21°
β = 98.25°, γ = 95.86°; Z = 2
Identification
ColorColorless, Light to Dark Pink
Crystal habitCrystals prismatic, typically radiating to spherulitic
Cleavage(010) perfect, (100) good, (101) indistinct
Mohs scale hardness3.5-4
LusterSubvitreous, waxy
StreakWhite
DiaphaneityTranslucent
Specific gravity3.05
Optical propertiesBiaxial (+), probable
Refractive indexnα = 1.618 nβ = 1.627 nγ= 1.642
Birefringence0.024
2V angleLarge
References[1][3][4][5]

Fluckite is an arsenate mineral with the chemical formula CaMnH2(AsO4)2·2(H2O).[1]

Fluckite's mineral crystallography is triclinic meaning it has three axis of different length and three different interior angles that do not equal 90°. Because fluckite possesses three axes with different angles and lengths it is an anisotropic mineral. This means that it has more than one optic axis. This mineral is a member of the P1 space group meaning that it can be rotated 360° degrees and inverted to obtain the original figure. Optically, this mineral has positive biaxial birefringence, which can be shown obtaining an interference figure that is blue in the upper right and lower left quadrants of the figure while looking down the c- axis. Fluckite possesses moderate optical relief which is the degree to which the mineral stands out from the mounting medium.[1]

Occurrence

[edit]

Fluckite was first described in 1980 for an occurrence in the Gabe-Gottes Mine in Haut-Rhin, Alsace, France,[1][6] and named for mineralogist Pierre Fluck of Louis Pasteur University in Strasbourg, France.[3] The mineral was found in at a depth of 100 m (330 ft). It occurs as a post-mine phase on carbonate gangue.[6] It occurs in association with native arsenic, tennantite, skutterudite, sainfeldite, pharmacolite, villyaellenite, picropharmacolite, calcite, dolomite, ankerite and quartz.[5]

References

[edit]
  1. ^ a b c d e Fluckite: mindat.org
  2. ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  3. ^ a b Fluckite: webmineral.com
  4. ^ Fluckite: Mineral Atlas[usurped]
  5. ^ a b Fluckite: Handbook of Mineralogy
  6. ^ a b M. Fleischer, L.J. Cabri, G.Y. Chao, and A. Pabst (1980) New Mineral Names*, American Mineralogist, 65,1065-1070.
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