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Paracoquimbite

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Formula:
Fe2(SO4)3 · 9H2O
System:
Trigonal
Colour:
Pale violet
Lustre:
Vitreous
Hardness:
Name:
From the Greek "para" for near and its relation to Coquimbite.
Dimorph of:
Apparently contains only trace amounts of Al, unlike coquimbite.


Classification of Paracoquimbite

Approved, 'Grandfathered' (first described prior to 1959)
7.CB.55

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
B : With only medium-sized cations
29.8.4.1

29 : HYDRATED ACID AND NORMAL SULFATES
8 : A2(XO4)3·H2O
25.10.10

25 : Sulphates
10 : Sulphates of Fe alone

Physical Properties of Paracoquimbite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Pale violet
Hardness (Mohs):
Cleavage:
Imperfect/Fair
On {0112} and {10
14}, imperfect.
Density:
2.11(1) g/cm3 (Measured)    2.115 g/cm3 (Calculated)

Optical Data of Paracoquimbite

Type:
Uniaxial (+)
RI values:
nω = 1.550() nε = 1.555(2)
Max Birefringence:
δ = 0.005
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Low

Chemical Properties of Paracoquimbite

Formula:
Fe2(SO4)3 · 9H2O
IMA Formula:
Fe23+(SO4)3 · 9H2O
Elements listed in formula:

Crystallography of Paracoquimbite

Crystal System:
Trigonal
Class (H-M):
3 - Rhombohedral
Space Group:
R3
Cell Parameters:
a = 10.926(9) Å, c = 51.3(21) Å
Ratio:
a:c = 1 : 4.695
Unit Cell Volume:
V 5,303.60 ų (Calculated from Unit Cell)
Z:
12
Morphology:
Crystals rhombohedral, frequently with large {0112}; also equant, pseudo-cubic, with large {0001} and {0112}, or prismatic [0001]. massive, granular.
Twinning:
On {0001}, common.

Epitaxial Relationships of Paracoquimbite

Epitaxial Minerals:
CoquimbiteFe2-xAlx(SO4)3 · 9H2O, x ~0.5
Epitaxy Comments:
Coquimbite in parallel position; contact surface {0001}. As scepter-like overgrowths.

Occurrences of Paracoquimbite

Type Occurrence of Paracoquimbite

Empirical Formula:
Fe23+(SO4)3 · 9H2O

Relationship of Paracoquimbite to other Species

Other Members of Group:
AluminocoquimbiteFeAl(SO4)3 · 9H2O
CoquimbiteFe2-xAlx(SO4)3 · 9H2O, x ~0.5
7.CB.05Dwornikite(Ni,Fe)SO4 · H2O
7.CB.05GunningiteZnSO4 · H2O
7.CB.05KieseriteMgSO4 · H2O
7.CB.05Poitevinite(Cu,Fe,Zn)SO4 · H2O
7.CB.05SzmikiteMnSO4 · H2O
7.CB.05SzomolnokiteFeSO4 · H2O
7.CB.05CobaltkieseriteCoSO4 · H2O
7.CB.07SanderiteMgSO4 · 2H2O
7.CB.10BonattiteCuSO4 · 3H2O
7.CB.15Aplowite(Co,Mn,Ni)SO4 · 4H2O
7.CB.15Boyleite(Zn,Mg)SO4 · 4H2O
7.CB.15Ilesite(Mn,Zn,Fe)SO4 · 4H2O
7.CB.15RozeniteFeSO4 · 4H2O
7.CB.15StarkeyiteMgSO4 · 4H2O
7.CB.15DrobeciteCdSO4 · 4H2O
7.CB.15CranswickiteMgSO4 · 4H2O
7.CB.20ChalcanthiteCuSO4 · 5H2O
7.CB.20JôkokuiteMnSO4 · 5H2O
7.CB.20PentahydriteMgSO4 · 5H2O
7.CB.20SiderotilFeSO4 · 5H2O
7.CB.25Bianchite(Zn,Fe)SO4 · 6H2O
7.CB.25Chvaleticeite(Mn,Mg)SO4 · 6H2O
7.CB.25FerrohexahydriteFeSO4 · 6H2O
7.CB.25HexahydriteMgSO4 · 6H2O
7.CB.25Moorhouseite(Co,Ni,Mn)SO4 · 6H2O
7.CB.25Nickelhexahydrite(Ni,Mg,Fe)SO4 · 6H2O
7.CB.30RetgersiteNiSO4 · 6H2O
7.CB.35BieberiteCoSO4 · 7H2O
7.CB.35BoothiteCuSO4 · 7H2O
7.CB.35MallarditeMnSO4 · 7H2O
7.CB.35MelanteriteFeSO4 · 7H2O
7.CB.35Zincmelanterite(Zn,Cu,Fe)SO4 · 7H2O
7.CB.35Alpersite(Mg,Cu)[SO4] · 7H2O
7.CB.40EpsomiteMgSO4 · 7H2O
7.CB.40GoslariteZnSO4 · 7H2O
7.CB.40MorenositeNiSO4 · 7H2O
7.CB.45AlunogenAl2(SO4)3 · 17H2O
7.CB.45Meta-alunogenAl2(SO4)3 · 12H2O
7.CB.50AluminocoquimbiteFeAl(SO4)3 · 9H2O
7.CB.55CoquimbiteFe2-xAlx(SO4)3 · 9H2O, x ~0.5
7.CB.55Rhomboclase(H5O2)Fe3+(SO4)2 · 2H2O
7.CB.60KorneliteFe2(SO4)3 · 7H2O
7.CB.65QuenstedtiteFe2(SO4)3 · 11H2O
7.CB.70LauseniteFe2(SO4)3·5H2O
7.CB.75LishizheniteZnFe2(SO4)4 · 14H2O
7.CB.75RömeriteFe2+Fe23+(SO4)4 · 14H2O
7.CB.80RansomiteCuFe2(SO4)4 · 6H2O
7.CB.85ApjohniteMn2+Al2(SO4)4 · 22H2O
7.CB.85BíliniteFe2+Fe23+(SO4)4 · 22H2O
7.CB.85Dietrichite(Zn,Fe2+,Mn2+)Al2(SO4)4 · 22H2O
7.CB.85HalotrichiteFeAl2(SO4)4 · 22H2O
7.CB.85PickeringiteMgAl2(SO4)4 · 22H2O
7.CB.85Redingtonite(Fe2+,Mg,Ni)(Cr,Al)2(SO4)4·22H2O
7.CB.85Wupatkiite(Co,Mg,Ni)Al2(SO4)4·22H2O
7.CB.90MeridianiiteMgSO4 · 11H2O
25.10.1SzomolnokiteFeSO4 · H2O
25.10.2RozeniteFeSO4 · 4H2O
25.10.3SiderotilFeSO4 · 5H2O
25.10.4FerrohexahydriteFeSO4 · 6H2O
25.10.5MelanteriteFeSO4 · 7H2O
25.10.6Rhomboclase(H5O2)Fe3+(SO4)2 · 2H2O
25.10.7LauseniteFe2(SO4)3·5H2O
25.10.8KorneliteFe2(SO4)3 · 7H2O
25.10.9CoquimbiteFe2-xAlx(SO4)3 · 9H2O, x ~0.5
25.10.11QuenstedtiteFe2(SO4)3 · 11H2O
25.10.12FerricopiapiteFe5(SO4)6O(OH) · 20H2O
25.10.13MetahohmanniteFe23+(SO4)2O · 4H2O
25.10.14HohmanniteFe23+(SO4)2O · 8H2O
25.10.15ButleriteFe3+(SO4)(OH) · 2H2O
25.10.16ParabutleriteFe3+(SO4)(OH) · 2H2O
25.10.17AmarantiteFe23+(SO4)2O · 7H2O
25.10.18FibroferriteFe3+(SO4)(OH) · 5H2O
25.10.19Hydroniumjarosite(H3O)Fe33+(SO4)2(OH)6
25.10.20RömeriteFe2+Fe23+(SO4)4 · 14H2O
25.10.21BíliniteFe2+Fe23+(SO4)4 · 22H2O
25.10.22CopiapiteFe2+Fe43+(SO4)6(OH)2 · 20H2O

Other Names for Paracoquimbite

Name in Other Languages:
Simplified Chinese:副针绿矾

Other Information

Other Information:
Soluble in water , astringent.
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 Paracoquimbite

Reference List:
Ungemach (1933) Comptes rendu de l’Académie des sciences de Paris: 197: 1132.

Ungemach (1935) Bulletin de la Société française de Minéralogie: 58: 165.

American Mineralogist (1971): 56: 1567.

Neues Jahrbuch für Mineralogie, Monatshefte (1974): 89.

J. Majzlan, T. Đjorđjević, U. Kolitsch & J. Schefer (2010): Hydrogen bonding in coquimbite, nominally Fe2(SO4)3•9H2O, and the relationship between coquimbite and paracoquimbite. Mineral. Petrol. 100, 241-248.

Internet Links for Paracoquimbite

mindat.org URL:
https://www.mindat.org/min-3084.html
Please feel free to link to this page.

Localities for Paracoquimbite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Austria
 
  • Lower Austria
    • Waldviertel
      • Drosendorf-Zissersdorf
        • Wollmersdorf (Zettlitz-Wollmersdorf)
Hammer, V.M.F. & Sabor, M. (2004): 1379) Paracoquimbit vom ehemaligen Graphitabbau Zettlitz bei Wollmersdorf. P. 244 in: Niedermayr, G. et al., Carinthia II, 194./114., 217-257.
Canada
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
Henderson, B. (2007): Römerite and paracoquimbite, two new sulfates found at Mont St-Hilaire. Micronews, 41(1), 4-6
Chile (TL)
 
  • Antofagasta Region
    • El Loa Province
      • Calama
        • Cerritos Bayos
Ungemach (1933) C.R. Acad.Sci. Paris: 197: 1133; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 535.; Kampf, A.R.; Mills, S.J.; Housley, R.M.; Williams, P.A.; Dini, M. (2012): Alcaparrosaite, K3Ti4+Fe3+(SO4)4O(H2O)2, a new hydrophobic Ti4+ sulfate from Alcaparrosa, Chile. Mineralogical Magazine 76, 851-861.
        • Chuquicamata District
          • Toki Cu deposit (Toki Cluster)
Ungemach (1933) C.R.Acad.Sci. Paris: 197: 1133; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 535.
  • Atacama Region
    • Copiapó Province
Ungemach (1933) C.R. Acad.Sci. Paris: 197, 1133; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 535.
China
 
  • Xinjiang Autonomous Region
    • Hami Prefecture (Kumul Prefecture; Qumul Prefecture)
      • Hami Co. (Kumul Co.; Qumul Co.)
Yingxia Xu, Kezhang Qin, Kuishou Ding, Yu Miao, Tonghui Fang, Xingwang Xu, and He Sun (2007): Mineral Deposits 26(1), 58-69; Kezhang Qin, Kuishou Ding, Yingxia Xu, Yu Miao, Tonghui Fang, and Xingwang Xu (2008): Acta Petrologica Sinica 24(5), 1112-1122
France
 
  • Brittany
    • Morbihan
      • Guern
R. Pierrot, L. Chauris, C. Laforêt and F. Pillard : "Inventaire Minéralogique de la France N° 9 : Morbihan", BRGM, 1980.
  • Grand Est
    • Haut-Rhin
Wittern, Journée: "Mineralien finden in den Vogesen", von Loga (Cologne), 1997
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
      • Tanneron
Mari G. (2002), La mine de Fontsante (Var), Le Règne Minéral, n°43, pp: 38-60
Germany
 
  • Saxony
    • Oberlausitz
      • Niesky
        • Horscha
Witzke, T. & Giesler, T. (2007): Der Schieferabbau Pansberg bei Horscha in der Lausitz, Sachsen. Lapis 32 (7-8), 68-73; 86.
  • Thuringia
    • Gera
      • Ronneburg U deposit
T. Witzke & F. Rüger: Lapis 1998(7/8), 26-64
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Agios Konstantinos [St Constantine] (Kamariza)
Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
        • Plaka
          • Plaka Mines
No reference listed
Branko Rieck Collection
Hungary
 
  • Baranya Co.
    • Mecsek Mts
      • Pécs
Japan
 
  • Kyushu Region
    • Oita prefecture
      • Beppu
Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
Portugal
 
  • Beja District
    • Mértola
      • Corte do Pinto
South Africa
 
  • Gauteng Province
    • Pretoria District (Tshwane District)
Glass, J. (2006). The environmental impact of the abandoned Edendale lead mine near Tshwane, South Africa (Doctoral dissertation, University of Johannesburg).
USA
 
  • Arizona
    • Cochise Co.
      • Mule Mts
        • Warren District
          • Bisbee
            • Calumet and Arizona group of claims (Calumet and Arizona Mining Company group of claims)
Grant, Raymond W., Bideaux, R.A., and Williams, S.A. (2006) Minerals Added to the Arizona List 1995-2005: 7.
Grant, Raymond W., Bideaux, R.A., and Williams, S.A. (2006) Minerals Added to the Arizona List 1995-2005: 7.
  • Georgia
    • Lincoln Co.
Collected by Julian Gray 21 September 2010. Confirmed by XRD at the University of Georgia.
  • Nebraska
    • Jefferson Co.
      • Fairbury
Chemical Geology Volume 215, Issues 1-4, 15 February 2005, Pages 433-452
  • Nevada
    • Washoe Co.
      • Steamboat Springs District
Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
  • Virginia
    • Louisa Co.
      • Gold-Pyrite Belt
        • Mineral
Minerals of Virginia 1990 by R. V. Dietrich
    • Rockbridge Co.
      • Lyndhurst-Vesuvius District
Minerals of Virginia 1990 by R. V. Dietrich
Mars
 
  • Aeolis quadrangle
    • Gusev Crater
      • Columbia Hills
        • Husband Hill
          • Cumberland Ridge
Johnson, J.R., Bell, J.F. III, Cloutis, E., Staid, M., Farrand, W.H., McCoy, T., Rice, M., Wang, A., Yen, A. (2007): Mineralogic constraints on sulfur-ric soils from Pancam spectra at Gusev crater, Mars. Geophysical Research Letters: 34: L13202; Farrand, W.H., Johnson, J.R., Rice, M.S., Wang, A., Bell III, J.F. (2016): VNIR Multispectral Observations of Aqueous Alteration Materials by the Pancams on the Spirit and Opportunity Mars Exploration Rovers. American Mineralogist, in press
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