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Miguelromeroite

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About MiguelromeroiteHide

Formula:
MnMn2Mn2(AsO4)2(HAsO4)2 · 4H2O
Crystal System:
Monoclinic
Name:
Named in 2009 by Anthony Robert Kampf in honor of Miguel Romero Sanchez [1926 Oaxaca, Mexico - January 8, 1997 Tehuacán, Pueblo, Mexico], chemist, agribusiness leader, politician, and philanthropist. The Miguel Romero Award is hosted by the Tucson Gem and Mineral Society.
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 MiguelromeroiteHide

Approved
Approval Year:
2009
8.CB.10

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

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

Chemical Properties of MiguelromeroiteHide

Formula:
MnMn2Mn2(AsO4)2(HAsO4)2 · 4H2O
IMA Formula:
Mn5(AsO3OH)2(AsO4)2(H2O)4

Crystallography of MiguelromeroiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
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 V:
1,624.38 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
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)

Type Occurrence of MiguelromeroiteHide

Synonyms of MiguelromeroiteHide

Relationship of Miguelromeroite to other SpeciesHide

Other Members of this group:
ChongiteCa3Mg2(AsO4)2(AsO3OH)2·4H2OMon. 2/m : B2/b
GiftgrubeiteCaMn2Ca2(AsO4)2(AsO3OH)2·4H2OMon. 2/m : B2/b
Hureaulite(Mn,Fe)5(PO4)2(HPO4)2 · 4H2OMon. 2/m : B2/b
NyholmiteCd3Zn2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
SainfelditeCa5(AsO4)2(AsO3OH)2 · 4H2OMon. 2/m : B2/b
VillyaelleniteMnMn2Ca2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b

Common AssociatesHide

Associated Minerals Based on Photo Data:
Erythrite4 photos of Miguelromeroite associated with Erythrite on mindat.org.
Parabrandtite1 photo of Miguelromeroite associated with Parabrandtite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.CB.05SerrabrancaiteMnPO4 · H2OMon. 2/m : B2/b
8.CB.10Hureaulite(Mn,Fe)5(PO4)2(HPO4)2 · 4H2OMon. 2/m : B2/b
8.CB.10SainfelditeCa5(AsO4)2(AsO3OH)2 · 4H2OMon. 2/m : B2/b
8.CB.10VillyaelleniteMnMn2Ca2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
8.CB.10UM1997-09-AsO:CaHMgZn(Mg,Ca,Zn)5(AsO4)2(HAsO4)2 · 4H2OMon.
8.CB.10NyholmiteCd3Zn2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
8.CB.15FluckiteCaMn2+(HAsO4)2 · 2H2OTric. 1 : P1
8.CB.15KrautiteMn(HAsO4) · H2OMon. 2 : P21
8.CB.20Cobaltkoritnigite(Co,Zn)(HAsO4) · H2OTric. 1 : P1
8.CB.20KoritnigiteZn(HAsO4) · H2OTric. 1 : P1
8.CB.25YvoniteCu(HAsO4) · 2H2OTric.
8.CB.30GeminiteCu(HAsO4) · H2OTric.
8.CB.35SchubneliteFe3+VO4 · H2OTric.
8.CB.40RadovaniteCu2Fe3+(AsO4)(HAs3+O3)2 · H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.CB.45KazakhstaniteFe3+5V4+3V5+12O39(OH)9 · 9H2OMon.
8.CB.50KolovratiteNixZny(VO4)0.67(x+y) · nH2O
8.CB.55IrhtemiteCa4Mg(AsO4)2(HAsO4)2 · 4H2OMon.
8.CB.60BurgessiteCo2(H2O)4[AsO3(OH)]2(H2O)Mon. 2/m

Related Minerals - Dana Grouping (8th Ed.)Hide

39.2.1.1Hureaulite(Mn,Fe)5(PO4)2(HPO4)2 · 4H2OMon. 2/m : B2/b
39.2.1.2SainfelditeCa5(AsO4)2(AsO3OH)2 · 4H2OMon. 2/m : B2/b
39.2.1.3VillyaelleniteMnMn2Ca2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
39.2.1.4UM1997-09-AsO:CaHMgZn(Mg,Ca,Zn)5(AsO4)2(HAsO4)2 · 4H2OMon.
39.2.1.6NyholmiteCd3Zn2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b

Other InformationHide

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 MiguelromeroiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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 MiguelromeroiteHide

Localities for MiguelromeroiteHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Chile
 
  • Atacama Region
    • Copiapó Province
      • Tierra Amarilla
        • Pampa Larga district
samples analysed by Jochen Schluter, Gerhard Mohn and Joy Desor
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(11-12), 1535-1540.
Japan (TL)
 
  • Honshu Island
    • Tohoku Region
      • Fukushima Prefecture
        • Iwaki City
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.
Mexico (TL)
 
  • 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.
USA (TL)
 
  • New Jersey
    • Sussex Co.
      • Franklin mining district
        • Ogdensburg
          • Sterling Hill
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. Verbeek, Earl R. and Nikischer, Tony (2010) Changes to the Mineral Species List in 2010, Picking Table v52 (1): 15.
Mineral and/or Locality  
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