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Miguelromeroite

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Big Photo

Veta Negra Mine, Pampa Larga district, Tierra Amarilla, Copiapó Province, Atacama Region, Chile
© JBS 2006

Show Miguelromeroite Photos (28)



Formula:
MnMn
 
2
Mn
 
2
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 4H
 
2
O
System:Monoclinic
Member of:Hureaulite Group


Hureaulite Group.
Mn analogue of sainfeldite. Known as a synthetic compound (Stock et al. 2002).

Note: The samples from the Veta Negra mine, Chile, were originally labeled "villyaellenite".

Classification of Miguelromeroite

IMA status:Approved 2009
Nickel-Strunz 10th (pending) edition ID:8.CB.10

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
B : With only medium-sized cations, RO4:H2O = 1:1
Dana 8th edition ID:39.2.1.4

39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
2 : (AB)5[HXO4]2[XO4]2.xH2O
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Type Occurrence of Miguelromeroite

Type Locality:Ojuela Mine, Mapimí, Mun. de Mapimí, Durango, Mexico

Crystallography of Miguelromeroite

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 = 18.0300(10) Å, b = 9.2715(5) Å, c = 9.7756(5) Å
β = 96.266(2)°
Ratio:a:b:c = 1.945 : 1 : 1.054
Unit Cell Volume:V 1,624.38 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
8.279 (28)
3.357 (33)
3.234 (100)
3.074 (68)
2.973 (39)
2.676 (21)
2.341 (21)
1.680 (26)

Chemical Properties of Miguelromeroite

Formula:
MnMn
 
2
Mn
 
2
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 4H
 
2
O
Essential elements:As, H, Mn, O
All elements listed in formula:As, H, Mn, O

Relationship of Miguelromeroite to other Species

Member of:Hureaulite Group
Other Members of Group:

- +
Hureaulite
(Mn,Fe)
 
5
(PO
 
4
)
 
2
(HPO
 
4
)
 
2
 · 4H
 
2
O
Nyholmite
Cd
 
3
Zn
 
2
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 4H
 
2
O
Sainfeldite
CaCa
 
2
Ca
 
2
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 4H
 
2
O
Villyaellenite
MnMn
 
2
Ca
 
2
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 4H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
8.CB.05Serrabrancaite
MnPO
 
4
 · H
 
2
O
8.CB.10Hureaulite
(Mn,Fe)
 
5
(PO
 
4
)
 
2
(HPO
 
4
)
 
2
 · 4H
 
2
O
8.CB.10Sainfeldite
CaCa
 
2
Ca
 
2
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 4H
 
2
O
8.CB.10Villyaellenite
MnMn
 
2
Ca
 
2
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 4H
 
2
O
8.CB.10UM1997-09-AsO:CaHMgZn
(Mg,Ca,Zn)
 
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 4H
 
2
O
8.CB.10Nyholmite
Cd
 
3
Zn
 
2
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 4H
 
2
O
8.CB.15Fluckite
CaMn
2+
 
(HAsO
 
4
)
 
2
 · 2H
 
2
O
8.CB.15Krautite
Mn(HAsO
 
4
) · H
 
2
O
8.CB.20Cobaltkoritnigite
(Co,Zn)(HAsO
 
4
) · H
 
2
O
8.CB.20Koritnigite
Zn(HAsO
 
4
) · H
 
2
O
8.CB.25Yvonite
Cu(HAsO
 
4
) · 2H
 
2
O
8.CB.30Geminite
Cu(HAsO
 
4
) · H
 
2
O
8.CB.35Schubnelite
Fe
3+
 
VO
 
4
 · H
 
2
O
8.CB.40Radovanite
Cu
 
2
Fe
3+
 
(AsO
 
4
)(HAs
3+
 
O
 
3
)
 
2
 · H
 
2
O
8.CB.45Kazakhstanite
Fe
3+
5
V
4+
3
V
5+
12
O
 
39
(OH)
 
9
 · 9H
 
2
O
8.CB.50Kolovratite
Ni
 
x
Zn
 
y
(VO
 
4
)
 
0.67(x+y)
 · nH
 
2
O
8.CB.55Irhtemite
Ca
 
4
Mg(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 4H
 
2
O
8.CB.60Burgessite
Co
 
2
(HAsO
 
4
)
 
2
 · 5H
 
2
O

Other Names for Miguelromeroite

Synonyms:
IMA2008-066
Other Languages:

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 Miguelromeroite

Reference List:

- +
Stock, N., Stucky, G. D. and Cheetham, A. K. (2002): Synthesis and characterization of the synthetic minerals villyaellenite and sarkinite, Mn5(AsO4)2(HAsO4)2•6H2O and Mn2(AsO4)(OH). Z. Anorg. Allg. Chem. 628, 357-362. [as villyaellenite]

Kampf, A.R. (2009): Miguelromeroite, the Mn analogue of sainfeldite, and redefinition of villyaellenite as an ordered intermediate in the sainfeldite-miguelromeroite series. American Mineralogist, 94, 1535-1540.

Internet Links for Miguelromeroite

Search Engines:
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    • External Links:
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  • Look for Miguelromeroite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
    • Mineral Dealers:
  • SpiriferMinerals.com - high quality low prices
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  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Miguelromeroite specimens for sale - minfind.com
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    • Localities for Miguelromeroite

    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.
    Chile
     
    • Atacama Region
      • Copiapó Province
        • Tierra Amarilla
          • Pampa Larga district
    		Maurizio Dini and Tony Kampf (pers. comm.)
    Japan
     
    • Honshu Island
      • Tohoku Region
        • Fukushima Prefecture
          • Iwaki City
    		Anthony Kampf, pers. comm., 2009.
    Mexico
     
    • Durango
      • Mun. de Mapimí
        • Mapimí
    		Kampf, A.R. (2009): Miguelromeroite, the Mn analogue of sainfeldite, and redefinition of villyaellenite as an ordered intermediate in the sainfeldite-miguelromeroite series. American Mineralogist, 94, 1535-1540.
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