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Meurigite-K

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Big Photo

Těškov, Rokycany (Rokitzan; Rokytzan), Plzeň Region, Bohemia (Böhmen; Boehmen), Czech Republic
© Leon Hupperichs

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Formula:
KFe
3+
8
(PO
 
4
)
 
6
(OH)
 
7
 · 6.5H
 
2
O
System:MonoclinicColour:yellowish brown, cream ...
Lustre:Vitreous, Waxy, SilkyHardness:3
Name:In honour of John Meurig Thomas (born 1932), crystal chemist, University of Cambridge, Cambridge, England.


Possibly identical to phosphofibrite (Kolitsch, 1999; Kampf & Kolitsch, 2008 and Kampf et al., 2009), although the latter appears to be K-deficient (K < 0.5 pfu).
See also the sodium analogue meurigite-Na.

Previously called meurigite (renamed in 2009).

Classification of Meurigite-K

IMA status:Approved 1995
Explanation of status:Possibly identical to earlier described phosphofibrite (see Kolitsch, 1999). Nomenclatorial implications complicated.
Strunz 9th edition ID:8.DK.15
Nickel-Strunz 10th (pending) edition ID:8.DJ.20

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
J : With large and medium-sized cations, (OH, etc.):RO4 = 1:1
Dana 8th edition ID:42.13.14.1

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
13 : Miscellaneous
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Type Occurrence of Meurigite-K

Type Locality:Chino Mine (Santa Rita Pit; Santa Rita Mine), Santa Rita, Santa Rita District, Grant Co., New Mexico, USA

Physical Properties of Meurigite-K

Lustre:Vitreous, Waxy, Silky
Diaphaneity (Transparency):Translucent
Comment:depending on the packing of the fibers
Colour:yellowish brown, cream to white, pale to canary yellow
Hardness (Mohs):3
Hardness Data:Estimated
Fracture:None observed
Density (measured):2.96 g/cm3

Crystallography of Meurigite-K

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/b {B1 1 2/b} {C2/c} {C1 2/c 1}
Cell Parameters:a = 29.018(5) Å, b = 5.1892(6) Å, c = 19.695(3) Å
β = 106.987(1)°
Ratio:a:b:c = 5.592 : 1 : 3.795
Unit Cell Volume:V 2836.3 ų
Z:4
Morphology:tabular on [001] and elongated parallel to [010]
X-Ray Powder Diffraction:
d-spacingIntensity
9.41 (60)
4.84 (90)
4.32 (70)
3.470 (60)
3.216 (100)
3.116 (80)

Optical Data of Meurigite-K

Type:Biaxial (+)
RI values: nα = 1.780(5) nβ = 1.785(5) nγ = 1.800(5)
2V:Calculated: 60°
Maximum Birefringence:δ = 0.020

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:r > v distinct
Pleochroism:Non-pleochroic

Chemical Properties of Meurigite-K

Formula:
KFe
3+
8
(PO
 
4
)
 
6
(OH)
 
7
 · 6.5H
 
2
O
Essential elements:Fe, H, K, O, P
All elements listed in formula:Fe, H, K, O, P

Relationship of Meurigite-K to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.DJ.05Johnwalkite
K(Mn
2+
 
,Fe
2+
 
,Fe
3+
 
)
 
2
(Nb
5+
 
,Ta
5+
 
)(PO
 
4
)
 
2
O
 
2
 · 2(H
 
2
O,OH)
8.DJ.05Olmsteadite
KFe
2+
2
(Nb
5+
 
,Ta
5+
 
)(PO
 
4
)
 
2
O
 
2
 · 2H
 
2
O
8.DJ.10Gatumbaite
CaAl
 
2
(PO
 
4
)
 
2
(OH)
 
2
 · H
 
2
O
8.DJ.15Camgasite
CaMg(AsO
 
4
)(OH) · 5H
 
2
O
8.DJ.20Phosphofibrite
K
 
<0.5
(Fe
3+
 
,Cu)
 
8
(PO
 
4
)
 
6
(OH)
 
7
 · 7H
 
2
O
8.DJ.20Meurigite-Na
NaFe
3+
8
(PO
 
4
)
 
6
(OH)
 
7
 · 6.5H
 
2
O
8.DJ.25Jungite
Ca
 
2
Zn
 
4
Fe
3+
8
(PO
 
4
)
 
9
(OH)
 
9
 · 16H
 
2
O
8.DJ.30Wycheproofite
NaAlZr(PO
 
4
)
 
2
(OH) · H
 
2
O
8.DJ.35Ercitite
Na
 
2
Mn
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.DJ.40Mrázekite
Bi
 
2
Cu
 
3
(PO
 
4
)
 
2
O
 
2
(OH)
 
2
 · H
 
2
O
8.DJ.45Attikaite
Ca
 
3
Cu
 
2
Al
 
2
(AsO
 
4
)
 
4
(OH)
 
4
 · 2H
 
2
O

Other Names for Meurigite-K

Synonyms:
IMA1995-022Potassian Kidwellite
Other Languages:
German:Meurigit-K
Spanish:Meurigita-K

Other Information

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 Meurigite-K

Reference List:

- +
Birch, W. D., Pring, A., Self, P. G., Gibbs, R. B., Keck, E., Jensen, M. C. and Foord, E. E. (1996): Meurigite, a new fibrous iron phosphate resembling kidwellite. Mineralogical Magazine 60, 787-793.

Kolitsch, U. (1999): Evidence for the identity of meurigite and phosphofibrite by transmission electron microscopy and X-ray powder diffraction. European Journal of Mineralogy: 11, Beih. No. 1, 132.

Mineralogical Record: 28: 143.

Kampf, A.R., J.J.Pluth, & Y. Chen (2007): The crystal structure of meurigite. American Mineralogist 92, 1518-1534.

A. R. Kampf and U. Kolitsch (2008): The relationship between phosphofibrite and meurigite. M&M6, 6th Intern. Conf. on Mineralogy & Museums, Colorado School of Mines, Golden, Colorado, USA, September 7-9, 2008; Program and Abstract Volume, 26.

A. R. Kampf, P. M. Adams, U. Kolitsch and I. M. Steele (2009): Meurigite-Na, a new species, and the relationship between phosphofibrite and meurigite. Am. Mineral. 94, 720-727.

Internet Links for Meurigite-K

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  • Raman and XRD data at RRUFF project
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  • Meurigite details from Handbook of Mineralogy (PDF)
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    • Localities for Meurigite-K

    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.
    Australia
     
    • Victoria
      • Wycheproof
    		Min. Mag., 60, 787-793
    Brazil
     
    • Minas Gerais
      • Doce valley
        • Conselheiro Pena
    		Luiz Menezes
        • Galiléia
          • Sapucaia do Norte
    		Luis Menezes specimens at Denver show, 2008.
    Chile
     
    • Tarapacá Region
      • Iquique Province
        • Collahuasi District
    		Sulphides analysed by geology dep. of company; sulphates, phosphates, analysed by Bob Jenkins (Usa) 2007
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Plzeň Region
        • Rokycany (Rokitzan; Rokytzan)
    		Janouš, F.: Minerály z Kněží hory u Těškova (okres Rokycany), Minerál, 1995, roč. 3, č. 6, s. 367-369.
      • South Bohemia Region
        • Písek
    		S. Mirete photo
    France
     
    • Auvergne
      • Allier
        • Ébreuil
          • Échassières
    		Le Règne Minéral, (33), 5-25.
    • Midi-Pyrénées
      • Aveyron
        • La Capelle-Bleys
    		Gayraud, L., Gineste, C., Bernadi, G. & Johannet, J.-M. (2011) - Bleys et Puech de Compolibat: deux localités minéralogiques remarquables du massif de leucogranite de La Capelle-Bleys (Aveyron), Le Cahier des Micromonteurs, 111(1), 7-23
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Wolfach
          • Oberwolfach
            • Rankach valley
    		WALENTA, K. and THEYE, T. (2001): Meurigit von der Grube Clara. Aufschluss 52, 243-246.
    • Bavaria
      • Upper Palatinate
        • Oberpfälzer Wald
          • Vohenstrauß
            • Pleystein
    		Dill, H.G., Weber, B. (2009), Pleystein-City on Pegmatite, 4th International Symposium on Granitic Pegmatites, Recife, Brazil.
            • Waidhaus
              • Hagendorf
    		http://www.berthold-weber.de/h_miner.htm
    Wittern: "Mineralfundorte in Deutschland", 2001
    • Saxony
      • Oberlausitz
        • Görlitz
          • Rengersdorf
    		Wittern: "Mineralfundorte in Deutschland", 2001
    USA
     
    • Nevada
      • Eureka Co.
        • Lynn District
    		NBMG Spec. Pub. 31 Minerals of Nevada
        • Maggie Creek District
    		NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
      • Humboldt Co.
        • Iron Point District
          • Valmy
    		Dr. William S. Wise presentation to Northwest Micro Mineral Study Group on 1 May 2004, Update on Mineralogy of the Silver Coin Mine, Iron Point District, Edna Mountains, Humboldt Co., Nevada
      • Pershing Co.
        • Willard District
    		[MinRec 39:297]
    • New Mexico
      • Grant Co.
        • Santa Rita District
          • Santa Rita
    		Min. Mag. 60:787-793.; Rocks & Minerals 84:492-500
    • South Dakota
      • Lawrence Co.
        • Lead District
    		Mineral Webzine, Dec. 2001
    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.
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