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Paracoquimbite

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Big Photo

São Domingos Mine, Mértola, Beja District, Portugal
© Martins da Pedra

Show Paracoquimbite Photos (2)



Formula:
Fe
 
2
(SO
 
4
)
 
3
 · 9H
 
2
O
System:TrigonalColour:Pale violet
Hardness:2½
Name:From the Greek "para" for near and its relation to Coquimbite.
Dimorph of:Coquimbite


Rhomboclase Group.
Apparently contains only trace amounts of Al, unlike coquimbite.

Classification of Paracoquimbite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:6/C.08-50
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:29.8.4.1

29 : HYDRATED ACID AND NORMAL SULFATES
8 : A2(XO4)3·H2O
Hey's CIM Ref.:25.10.10

25 : Sulphates
10 : Sulphates of Fe alone
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Type Occurrence of Paracoquimbite

Co-type Localities:Alcaparrosa Mine, Cerritos Bayos, Calama, El Loa Province, Antofagasta Region, Chile
Queténa Mine (Queténa Prospect), Toki Cu deposit (Toki Cluster), Chuquicamata District, Calama, El Loa Province, Antofagasta Region, Chile
Tierra Amarilla, Copiapó Province, Atacama Region, Chile
Year of Discovery:1933

Occurrences of Paracoquimbite

Geological Setting:Oxidation zone in pyrite deposits - especially in arid regions.

Physical Properties of Paracoquimbite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Pale violet
Hardness (Mohs):2½
Cleavage:Imperfect/Fair
On {0112} and {10
14}, imperfect.
Density (measured):2.11(1) g/cm3
Density (calculated):2.115 g/cm3

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:
Coquimbite
Fe
 
2-x
Al
 
x
(SO
 
4
)
 
3
 · 9H
 
2
O, x ~0.5
Epitaxi Comments:Coquimbite in parallel position; contact surface {0001}. As scepter-like overgrowths.

Optical Data of Paracoquimbite

Type:Uniaxial (+)
RI values: nω = 1.550() nε = 1.555(2)
Maximum Birefringence:δ = 0.005

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low

Chemical Properties of Paracoquimbite

Formula:
Fe
 
2
(SO
 
4
)
 
3
 · 9H
 
2
O
Essential elements:Fe, H, O, S
All elements listed in formula:Fe, H, O, S
Empirical Formula:
Fe
3+
2
(SO
 
4
)
 
3
 · 9H
 
2
O

Relationship of Paracoquimbite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
7.CB.05Dwornikite
(Ni,Fe)SO
 
4
 · H
 
2
O
7.CB.05Gunningite
ZnSO
 
4
 · H
 
2
O
7.CB.05Kieserite
MgSO
 
4
 · H
 
2
O
7.CB.05Poitevinite
(Cu,Fe,Zn)SO
 
4
 · H
 
2
O
7.CB.05Szmikite
MnSO
 
4
 · H
 
2
O
7.CB.05Szomolnokite
FeSO
 
4
 · H
 
2
O
7.CB.05Cobaltkieserite
CoSO
 
4
 · H
 
2
O
7.CB.07Sanderite
MgSO
 
4
 · 2H
 
2
O
7.CB.10Bonattite
CuSO
 
4
 · 3H
 
2
O
7.CB.15Aplowite
(Co,Mn,Ni)SO
 
4
 · 4H
 
2
O
7.CB.15Boyleite
(Zn,Mg)SO
 
4
 · 4H
 
2
O
7.CB.15Ilesite
(Mn,Zn,Fe)SO
 
4
 · 4H
 
2
O
7.CB.15Rozenite
FeSO
 
4
 · 4H
 
2
O
7.CB.15Starkeyite
MgSO
 
4
 · 4H
 
2
O
7.CB.15Drobecite
CdSO
 
4
 · 4H
 
2
O
7.CB.15Cranswickite
MgSO
 
4
 · 4H
 
2
O
7.CB.20Chalcanthite
CuSO
 
4
 · 5H
 
2
O
7.CB.20Jôkokuite
MnSO
 
4
 · 5H
 
2
O
7.CB.20Pentahydrite
MgSO
 
4
 · 5H
 
2
O
7.CB.20Siderotil
FeSO
 
4
 · 5H
 
2
O
7.CB.25Bianchite
(Zn,Fe)SO
 
4
 · 6H
 
2
O
7.CB.25Chvaleticeite
(Mn,Mg)SO
 
4
 · 6H
 
2
O
7.CB.25Ferrohexahydrite
FeSO
 
4
 · 6H
 
2
O
7.CB.25Hexahydrite
MgSO
 
4
 · 6H
 
2
O
7.CB.25Moorhouseite
(Co,Ni,Mn)SO
 
4
 · 6H
 
2
O
7.CB.25Nickelhexahydrite
(Ni,Mg,Fe)SO
 
4
 · 6H
 
2
O
7.CB.30Retgersite
NiSO
 
4
 · 6H
 
2
O
7.CB.35Bieberite
CoSO
 
4
 · 7H
 
2
O
7.CB.35Boothite
CuSO
 
4
 · 7H
 
2
O
7.CB.35Mallardite
MnSO
 
4
 · 7H
 
2
O
7.CB.35Melanterite
FeSO
 
4
 · 7H
 
2
O
7.CB.35Zincmelanterite
(Zn,Cu,Fe)SO
 
4
 · 7H
 
2
O
7.CB.35Alpersite
(Mg,Cu)[SO
 
4
] · 7H
 
2
O
7.CB.40Epsomite
MgSO
 
4
 · 7H
 
2
O
7.CB.40Goslarite
ZnSO
 
4
 · 7H
 
2
O
7.CB.40Morenosite
NiSO
 
4
 · 7H
 
2
O
7.CB.45Alunogen
Al
 
2
(SO
 
4
)
 
3
 · 17H
 
2
O
7.CB.45Meta-alunogen
Al
 
2
(SO
 
4
)
 
3
 · 12H
 
2
O
7.CB.50Aluminocoquimbite
FeAl(SO
 
4
)
 
3
 · 9H
 
2
O
7.CB.55Coquimbite
Fe
 
2-x
Al
 
x
(SO
 
4
)
 
3
 · 9H
 
2
O, x ~0.5
7.CB.55Rhomboclase
(H
 
5
O
 
2
)Fe
3+
 
(SO
 
4
)
 
2
 · 2H
 
2
O
7.CB.60Kornelite
Fe
 
2
(SO
 
4
)
 
3
 · 7H
 
2
O
7.CB.65Quenstedtite
Fe
 
2
(SO
 
4
)
 
3
 · 10H
 
2
O
7.CB.70Lausenite
Fe
 
2
(SO
 
4
)
 
3
·6H
 
2
O
7.CB.75Lishizhenite
ZnFe
 
2
(SO
 
4
)
 
4
 · 14H
 
2
O
7.CB.75Römerite
Fe
2+
 
Fe
3+
2
(SO
 
4
)
 
4
 · 14H
 
2
O
7.CB.80Ransomite
CuFe
 
2
(SO
 
4
)
 
4
 · 6H
 
2
O
7.CB.85Apjohnite
Mn
2+
 
Al
 
2
(SO
 
4
)
 
4
 · 22H
 
2
O
7.CB.85Bílinite
Fe
2+
 
Fe
3+
2
(SO
 
4
)
 
4
 · 22H
 
2
O
7.CB.85Dietrichite
(Zn,Fe
2+
 
,Mn
2+
 
)Al
 
2
(SO
 
4
)
 
4
 · 22H
 
2
O
7.CB.85Halotrichite
FeAl
 
2
(SO
 
4
)
 
4
 · 22H
 
2
O
7.CB.85Pickeringite
MgAl
 
2
(SO
 
4
)
 
4
 · 22H
 
2
O
7.CB.85Redingtonite
(Fe
2+
 
,Mg,Ni)(Cr,Al)
 
2
(SO
 
4
)
 
4
·22H
 
2
O
7.CB.85Wupatkiite
(Co,Mg,Ni)Al
 
2
(SO
 
4
)
 
4
·22H
 
2
O
7.CB.90Meridianiite
MgSO
 
4
 · 11H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
25.10.1Szomolnokite
FeSO
 
4
 · H
 
2
O
25.10.2Rozenite
FeSO
 
4
 · 4H
 
2
O
25.10.3Siderotil
FeSO
 
4
 · 5H
 
2
O
25.10.4Ferrohexahydrite
FeSO
 
4
 · 6H
 
2
O
25.10.5Melanterite
FeSO
 
4
 · 7H
 
2
O
25.10.6Rhomboclase
(H
 
5
O
 
2
)Fe
3+
 
(SO
 
4
)
 
2
 · 2H
 
2
O
25.10.7Lausenite
Fe
 
2
(SO
 
4
)
 
3
·6H
 
2
O
25.10.8Kornelite
Fe
 
2
(SO
 
4
)
 
3
 · 7H
 
2
O
25.10.9Coquimbite
Fe
 
2-x
Al
 
x
(SO
 
4
)
 
3
 · 9H
 
2
O, x ~0.5
25.10.11Quenstedtite
Fe
 
2
(SO
 
4
)
 
3
 · 10H
 
2
O
25.10.12Ferricopiapite
Fe
 
5
(SO
 
4
)
 
6
O(OH) · 20H
 
2
O
25.10.13Metahohmannite
Fe
3+
2
(SO
 
4
)
 
2
O · 4H
 
2
O
25.10.14Hohmannite
Fe
3+
2
(SO
 
4
)
 
2
O · 8H
 
2
O
25.10.15Butlerite
Fe
3+
 
(SO
 
4
)(OH) · 2H
 
2
O
25.10.16Parabutlerite
Fe
3+
 
(SO
 
4
)(OH) · 2H
 
2
O
25.10.17Amarantite
Fe
3+
2
(SO
 
4
)
 
2
O · 7H
 
2
O
25.10.18Fibroferrite
Fe
3+
 
(SO
 
4
)(OH) · 5H
 
2
O
25.10.19Hydroniumjarosite
(H
 
3
O)Fe
3+
3
(SO
 
4
)
 
2
(OH)
 
6
25.10.20Römerite
Fe
2+
 
Fe
3+
2
(SO
 
4
)
 
4
 · 14H
 
2
O
25.10.21Bílinite
Fe
2+
 
Fe
3+
2
(SO
 
4
)
 
4
 · 22H
 
2
O
25.10.22Copiapite
Fe
2+
 
Fe
3+
4
(SO
 
4
)
 
6
(OH)
 
2
 · 20H
 
2
O

Other Names for Paracoquimbite

Other Languages:
German:Paracoquimbit
Russian:Паракокимбит
Spanish:Paracoquimbita

Other Information

Other Information:Soluble in water , astringent.
Health Warning: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

Search Engines:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Paracoquimbite details from Handbook of Mineralogy (PDF)
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    • Localities for Paracoquimbite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? 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
          • Zettlitz
    		Carinthia II, 194./114 (2004) 217-257.
    Canada
     
    • Québec
      • Montérégie
        • Rouville RCM
          • Mont Saint-Hilaire
    		Henderson, B. (2007): Römerite and paracoquimbite, two new sulfates found at Mont St-Hilaire. Micronews, 41(1), 4-6
    Chile
     
    • 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.
          • 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 (Xinjiang-Uygur) Autonomous Region
      • Hami (Kumul; Qumul) Prefecture
        • Hami (Kumul; Qumul) Co.
    		Kezhang Qin, Kuishou Ding, Yingxia Xu, Yu Miao, Tonghui Fang, and Xingwang Xu (2008): Acta Petrologica Sinica 24(5), 1112-1122
    France
     
    • Alsace
      • Haut-Rhin
    		Wittern, Journée: "Mineralien finden in den Vogesen", von Loga (Cologne), 1997
    • Brittany
      • Morbihan
        • Pontivy
          • Guern
    		R. Pierrot, L. Chauris, C. Laforêt and F. Pillard : "Inventaire Minéralogique de la France N° 9 : Morbihan", BRGM, 1980.
    • 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 (Attica; Attika) Prefecture
      • Lavrion (Laurion; Laurium) District
        • Lavrion District Mines
          • Agios Konstantinos [St Constantine] (Kamariza)
    		Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
          • Plaka
            • Plaka Mines
    		No reference listed
    Hungary
     
    • Baranya Co.
      • Mecsek Mts.
        • Pécs
    Japan
     
    • Kyushu Region
      • Oita prefecture
        • Beppu
    		Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
    Portugal
     
    • Beja District
      • Mértola
    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
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 19th Jun 2011 10:44:59
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