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Serrabrancaite

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Formula:
MnPO4 · H2O
System:
Monoclinic
Colour:
Dark brown to dark ...
Lustre:
Adamantine, Sub-Adamantine, Vitreous
Hardness:
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.


Classification of Serrabrancaite

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 Serrabrancaite

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

Optical Data of Serrabrancaite

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 Serrabrancaite

Formula:
MnPO4 · H2O
Elements listed in formula:

Crystallography of Serrabrancaite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Space Group 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 Volume:
V 351.82 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Pseudo-octahedral
X-Ray 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 Serrabrancaite

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

Relationship of Serrabrancaite to other Species

Member of:
Other Members of Group:
CobaltkieseriteCoSO4 · H2O
Dwornikite(Ni,Fe)SO4 · H2O
GunningiteZnSO4 · H2O
KieseriteMgSO4 · H2O
SzmikiteMnSO4 · H2O
SzomolnokiteFeSO4 · H2O
8.CB.10HureauliteMn52+(PO3OH)2(PO4)2 · 4H2O
8.CB.10SainfelditeCa5(AsO4)2(AsO3OH)2 · 4H2O
8.CB.10Villyaellenite(Mn,Ca)Mn22+Ca2(AsO4)2(AsO3OH)2 · 4H2O
8.CB.10UM1997-09-AsO:CaHMgZn(Mg,Ca,Zn)5(AsO4)2(HAsO4)2 · 4H2O
8.CB.10NyholmiteCd3Zn2(AsO4)2(AsO3OH)2 · 4H2O
8.CB.10MiguelromeroiteMn5(AsO4)2(AsO3OH)2 · 4H2O
8.CB.15FluckiteCaMn2+(AsO3OH)2 · 2H2O
8.CB.15KrautiteMn(AsO3OH) · H2O
8.CB.20CobaltkoritnigiteCo(AsO3OH) · H2O
8.CB.20KoritnigiteZn(AsO3OH) · H2O
8.CB.25YvoniteCu(AsO3OH) · 2H2O
8.CB.30GeminiteCu2+(AsO3OH) · H2O
8.CB.35SchubneliteFe3+V5+O4 · H2O
8.CB.40RadovaniteCu2Fe3+(AsO4)(AsO2(OH))2 · H2O
8.CB.45KazakhstaniteFe53+V34+V125+O39(OH)9 · 8.5H2O
8.CB.50Kolovratite(Ni,Zn)xVO4 · nH2O
8.CB.55IrhtemiteCa4Mg(AsO4)2(AsO3OH)2 · 4H2O
8.CB.60BurgessiteCo2(H2O)4(AsO3OH)2 · H2O

Other Names for Serrabrancaite

Name in Other Languages:

Other Information

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 Serrabrancaite

Reference List:
American Mineralogist (2000): 85: 847-849.

Inorganic Chemistry: 26: 3544-3547.

Internet Links for Serrabrancaite

mindat.org URL:
https://www.mindat.org/min-7288.html
Please feel free to link to this page.

Localities for Serrabrancaite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Brazil
 
  • Minas Gerais
    • Conselheiro Pena
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
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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