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Miguelromeroite

Formula:
MnMn
 
2
Mn
 
2
(AsO
 
3
OH)
 
2
(AsO
 
4
)
 
2
·4H
 
2
O
System:Monoclinic


Hureaulite Group.
Mn analogue of sainfeldite.

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)

Chemical Properties of Miguelromeroite

Formula:
MnMn
 
2
Mn
 
2
(AsO
 
3
OH)
 
2
(AsO
 
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 Group:
Hureaulite Group:
Related Minerals - Nickel-Strunz Grouping):

- +
8.CB.05Serrabrancaite
MnPO
 
4
·H
 
2
O
8.CB.10Hureaulite
(Mn,Fe)
 
5
(PO
 
3
OH)
 
2
(PO
 
4
)
 
2
·4H
 
2
O
8.CB.10Sainfeldite
Ca
 
5
(AsO
 
3
OH)
 
2
(AsO
 
4
)
 
2
·4H
 
2
O
8.CB.10Villyaellenite
MnMn
 
2
Ca
 
2
(AsO
 
3
OH)
 
2
(AsO
 
4
)
 
2
·4H
 
2
O
8.CB.10UM1997-09-AsO:CaHMgZn
(Mg,Ca,Zn)
 
5
(AsO
 
4
)
 
2
[AsO
 
3
(OH)]
 
2
·4H
 
2
O
8.CB.10IMA2008-047
Cd
 
3
Zn
 
2
(AsO
 
3
OH)
 
2
(AsO
 
4
)
 
2
·4H
 
2
O
8.CB.15Fluckite
CaMnH
 
2
(AsO
 
4
)
 
2
·2H
 
2
O
8.CB.15Krautite
MnHAsO
 
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
 
2
[As
 
2
O
 
7
] · 3H
 
2
O
8.CB.35Schubnelite
Fe
 
2-x
V
 
2
O
 
4
(OH)
 
4
8.CB.40Radovanite
Cu
 
2
Fe
3+
 
[(As
3+
 
O
 
2
(OH)]
 
2
[As
5+
 
O
 
4
]·H
 
2
O
8.CB.45Kazakhstanite
Fe
 
5
V
 
3
V
 
12
O
 
39
(OH)
 
9
·9H
 
2
O
8.CB.50Kolovratite
(Zn,Ni,Cu)
 
2-5
Al
 
4-6
(Si,V
4+
 
,V
5+
 
)
 
4
(O,OH)
 
20
·7.5H
 
2
O
8.CB.55Irhtemite
Ca
 
4
Mg[(HAsO
 
4
)
 
2
|(AsO
 
4
)
 
2
] · 4H
 
2
O
8.CB.60Burgessite
Co
 
2
(H
 
2
O)
 
4
[AsO
 
3
OH]
 
2
(H
 
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: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, (in press).

Internet Links for Miguelromeroite

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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.
    (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
    Anthony Kampf, pers. comm., 2009.
    Mexico
     
    • Durango
      • Mun. de Mapimí
        • Mapimí
    IMA website - Approvals February 2009
    Mineral and/or Locality
    Google
     
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. 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. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 16th Nov 2009 16:51:05