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Serrabrancaite

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Formula:
MnPO4 · H2O
Colour:
Dark brown to dark greenish black
Lustre:
Adamantine, Sub-Adamantine, Vitreous
Hardness:
Specific Gravity:
3.17
Crystal System:
Monoclinic
Member of:
Name:
Named in 2000 by Thomas Witzke, Reinhard Wegner, Thomas Doering, Herbert Pöllmann, and Walter Schuckmann for the type locality, the Serra Branca pegmatite, Pedra Lavrada, Paraíba, Northeast Region, Brazil.
Isostructural with:
This page provides mineralogical data about Serrabrancaite.


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Classification of SerrabrancaiteHide

Approved
8.CB.05

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

Physical Properties of SerrabrancaiteHide

Adamantine, Sub-Adamantine, Vitreous
Transparency:
Transparent, Translucent
Colour:
Dark brown to dark greenish black
Streak:
Olive-green
Hardness:
3½ on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Density:
3.17 g/cm3 (Measured)    

Optical Data of SerrabrancaiteHide

Type:
Biaxial
RI values:
nα = 1.750 nβ = 1.790 nγ = 1.800
Birefringence:
0.050
Max Birefringence:
δ = 0.050
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r < v marked
Pleochroism:
Visible
Comments:
Dark brown to olive greenish brown

Chemical Properties of SerrabrancaiteHide

Formula:
MnPO4 · H2O

Crystallography of SerrabrancaiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 6.914 Å, b = 7.468 Å, c = 7.364 Å
β = 112.29°
Ratio:
a:b:c = 0.926 : 1 : 0.986
Unit Cell V:
351.82 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Pseudo-octahedral

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.856 (12)
4.633 (15)
3.503 (100)
3.271 (10)
2.957 (10)
2.530 (9)
2.516 (19)
2.197 (5)
2.104 (12)
1.985 (5)
1.906 (5)
1.861 (5)
Comments:
See also ICDD 33-882

Type Occurrence of SerrabrancaiteHide

General Appearance of Type Material:
Dark brown to greenish black pseudo-octahedral crystals to 0.3 mm
Geological Setting of Type Material:
Late stage alteration of phosphates in granite pegmatite
Associated Minerals at Type Locality:

Synonyms of SerrabrancaiteHide

Other Language Names for SerrabrancaiteHide

Relationship of Serrabrancaite to other SpeciesHide

Member of:
Other Members of this group:
CobaltkieseriteCoSO4 · H2OMon. 2/m : B2/b
Dwornikite(Ni,Fe)SO4 · H2OMon. 2/m : B2/b
GunningiteZnSO4 · H2OMon. 2/m : B2/b
KieseriteMgSO4 · H2OMon. 2/m
SzmikiteMnSO4 · H2OMon.
SzomolnokiteFeSO4 · H2OMon. 2/m : B2/b

Common AssociatesHide

Associated Minerals Based on Photo Data:
Bermanite3 photos of Serrabrancaite associated with Bermanite on mindat.org.
Phosphosiderite1 photo of Serrabrancaite associated with Phosphosiderite on mindat.org.
Vernadite1 photo of Serrabrancaite associated with Vernadite on mindat.org.
Rockbridgeite1 photo of Serrabrancaite associated with Rockbridgeite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.CB.10Hureaulite(Mn,Fe)5(PO4)2(HPO4)2 · 4H2OMon. 2/m : B2/b
8.CB.10SainfelditeCaCa2Ca2(AsO4)2(HAsO4)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.10MiguelromeroiteMnMn2Mn2(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(HAsO4)2 · 5H2OMon. 2/m

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 SerrabrancaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist (2000): 85: 847-849.
Inorganic Chemistry: 26: 3544-3547.

Internet Links for SerrabrancaiteHide

Localities for SerrabrancaiteHide

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.
Brazil
 
  • Minas Gerais
    • Conselheiro Pena
Sergio Varvello collection
Sergio Varvello collection
    • Galiléia
      • Sapucaia do Norte
Sergio Varvello collection
  • Paraíba
    • Borborema mineral province
      • Pedra Lavrada
Amer.Min.(2000) 85, 847-849
Poland
 
  • Lower Silesia (Dolnośląskie)
    • Dzierżoniów District
      • Piława Górna (Ober Peilau; Gnadenfrei)
        • DSS Piława Górna Quarry
Pieczka, A., Włodek, A., Gołębiowska, B., Szełęg, E., Szuszkiewicz, A., Ilnicki, S., Nejbert, K., Turniak, K. (2015): Phosphate-bearing pegmatites in the Góry Sowie Block and adjacent areas, Sudetes, SW Poland. 7th International Symposium on Granitic Pegmatites, PEG 2015 Książ, Poland. Abstracts: 77-78
Portugal
 
  • Guarda District
    • Gouveia
      • Folgosinho
Sergio Varvello collection. Alves, P., Kampf, A.R. (2017): Serrabrancaíta de la mina Sitio do Castelo, Folgosinho (Guarda, Portugal). Acopios, 8: 11-15. (in Spanish).
Rwanda
 
  • Western Province
    • Gatumba District
Lapis 35 (3) (2010) p. 12;
USA
 
  • Virginia
    • Amelia Co.
      • Winterham
Michael Hatskel collection (ID by Dr. Lance Kearns and Betsy Martin)
Mineral and/or Locality  
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