Serrabrancaite
A valid IMA mineral species
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About Serrabrancaite
me and a crane, because the deepness of the mine
Serra Branca pegmatite, Pedra Lavrada, Paraíba, Brazil
Serra Branca pegmatite, Pedra Lavrada, Paraíba, Brazil
Formula:
MnPO4 · H2O
Colour:
Dark brown to dark greenish black
Lustre:
Adamantine, Sub-Adamantine, Vitreous
Hardness:
3½
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.
Type Locality:
Isostructural with:
This page provides mineralogical data about Serrabrancaite.
Unique Identifiers
Mindat ID:
7288
Long-form identifier:
mindat:1:1:7288:1
IMA Classification of Serrabrancaite
Approved
IMA Formula:
Mn3+PO4·H2O
First published:
2000
Classification of Serrabrancaite
8.CB.05
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
B : With only medium-sized cations, RO4:H2O = 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
B : With only medium-sized cations, RO4:H2O = 1:1
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Sra | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Serrabrancaite
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
Fracture:
Irregular/Uneven
Density:
3.17(1) g/cm3 (Measured) 3.16 g/cm3 (Calculated)
Comment:
Measured using float-sink method and sodiumpolytungstate solution
Optical Data of Serrabrancaite
Type:
Biaxial
RI values:
nα = 1.75 nβ = 1.79 nγ = 1.8
Birefringence:
0.050
Max. Birefringence:
δ = 0.050
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Dispersion:
r < v marked
Pleochroism:
Visible
Comments:
Dark brown to olive greenish brown
Chemistry of Serrabrancaite
Mindat Formula:
MnPO4 · H2O
Element Weights:
Elements listed:
Crystallography of Serrabrancaite
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°
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
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0012696 | Serrabrancaite | Lightfoot P, Cheetham A K, Sleight A W (1987) Structure of MnPO4*H2O by synchrotron X-ray powder diffraction Inorganic Chemistry 26 3544-3547 | 1987 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.856 Å | (12) |
| 4.633 Å | (15) |
| 3.503 Å | (100) |
| 3.271 Å | (10) |
| 2.957 Å | (10) |
| 2.530 Å | (9) |
| 2.516 Å | (19) |
| 2.197 Å | (5) |
| 2.104 Å | (12) |
| 1.985 Å | (5) |
| 1.906 Å | (5) |
| 1.861 Å | (5) |
Comments:
See also ICDD 33-882
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47c : [Carbonates, phosphates, borates, nitrates] | |
| 47e : [Vanadates, chromates, manganates] |
Type Occurrence of Serrabrancaite
General Appearance of Type Material:
Dark brown to greenish black pseudo-octahedral crystals to 0.3 mm
Place of Conservation of Type Material:
Mineralogical Collection of the Bergakademie Freiberg, Germany (No. 78025) and in the Mineralogical Collection of the Martin-Luther Universität Halle, Institut für Geologische Wissenschaften (No. 010355).
Geological Setting of Type Material:
Late stage alteration of phosphates in granite pegmatite
Associated Minerals at Type Locality:
Synonyms of Serrabrancaite
Other Language Names for Serrabrancaite
Relationship of Serrabrancaite to other Species
Member of:
Other Members of Kieserite Group:
| Cobaltkieserite | CoSO4 · H2O | Mon. 2/m : B2/b |
| Dwornikite | Ni(SO4) · H2O | Mon. 2/m : B2/b |
| Ermeloite | Al(PO4) · H2O | Mon. 2/m : B2/b |
| Gunningite | ZnSO4 · H2O | Mon. 2/m : B2/b |
| Kieserite | MgSO4 · H2O | Mon. 2/m : B2/b |
| Szmikite | MnSO4 · H2O | Mon. 2/m : B2/b |
| Szomolnokite | FeSO4 · H2O | Mon. 2/m : B2/b |
Common Associates
Associations Based on Photo Data:
| 10 photos of Serrabrancaite associated with Bermanite | Mn2+Mn3+2(PO4)2(OH)2 · 4H2O |
| 10 photos of Serrabrancaite associated with Phosphosiderite | FePO4 · 2H2O |
| 2 photos of Serrabrancaite associated with Nsutite | (Mn4+,Mn2+)(O,OH)2 |
| 2 photos of Serrabrancaite associated with Vernadite | (Mn4+,Fe3+,Ca,Na)(O,OH)2 · nH2O |
| 1 photo of Serrabrancaite associated with Variscite | AlPO4 · 2H2O |
| 1 photo of Serrabrancaite associated with Schoonerite | ZnMn2+Fe2+2Fe3+(PO4)3(OH)2 · 9H2O |
| 1 photo of Serrabrancaite associated with Tavorite | LiFe3+(PO4)(OH) |
| 1 photo of Serrabrancaite associated with Rockbridgeite | (Fe2+0.5Fe3+0.5)2Fe3+3(PO4)3(OH)5 |
Related Minerals - Strunz-mindat Grouping
| 8.CB. | Krupičkaite | Cu6[AsO3(OH)]6 · 8H2O |
| 8.CB.X | Honzaite | Ni2(AsO3OH)2 · 5H2O |
| 8.CB.X | Redondite | AlPO4 · 2H2O |
| 8.CB.05 | Ermeloite | Al(PO4) · H2O |
| 8.CB.10 | Nyholmite | Cd3Zn2(AsO3OH)2(AsO4)2 · 4H2O |
| 8.CB.10 | Villyaellenite | (Mn,Ca)Mn2Ca2(AsO3OH)2(AsO4)2 · 4H2O |
| 8.CB.10 | Giftgrubeite | CaMn2Ca2(AsO4)2(AsO3OH)2 · 4H2O |
| 8.CB.10 | Hureaulite | Mn2+5(PO3OH)2(PO4)2 · 4H2O |
| 8.CB.10 | Miguelromeroite | Mn2+5(AsO3OH)2(AsO4)2(H2O)4 |
| 8.CB.10 | 'UM1997-09-AsO:CaHMgZn' | (Mg,Ca,Zn)5(AsO4)2(HAsO4)2 · 4H2O |
| 8.CB.15 | Krautite | Mn(HAsO4) · H2O |
| 8.CB.20 | Cobaltkoritnigite | Co(AsO3OH) · H2O |
| 8.CB.20 | Magnesiokoritnigite | Mg(AsO3OH) · H2O |
| 8.CB.20 | Koritnigite | Zn(AsO3OH) · H2O |
| 8.CB.25 | Yvonite | Cu(HAsO4) · 2H2O |
| 8.CB.30 | Geminite | Cu2+(AsO3OH) · H2O |
| 8.CB.35 | Schubnelite | Fe3+VO4 · H2O |
| 8.CB.40 | Radovanite | Cu2Fe3+(AsO4)(HAs3+O3)2 · H2O |
| 8.CB.45 | Kazakhstanite | Fe3+5V4+3V5+12O39(OH)9 · 9H2O |
| 8.CB.50 | Kolovratite | NixZny(VO4)0.67(x+y) · nH2O |
| 8.CB.60 | Burgessite | Co2(H2O)4[AsO3(OH)]2(H2O) |
| 8.CB.65 | Cardite | Zn5.5(AsO4)2(AsO3OH)(OH)3 · 3H2O |
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.
Internet Links for Serrabrancaite
mindat.org URL:
https://www.mindat.org/min-7288.html
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References for Serrabrancaite
Reference List:
Lightfoot, Philip; Cheetham, Anthony K.; Sleight, Arthur W. (1987) Structure of MnPO4·H2O by synchrotron x-ray powder diffraction. Inorganic Chemistry, 26 (21). p.3544-3547. doi:10.1021/ic00268a025
Witzke, Thomas, Wegner, Reinhard, Doering, Thomas, Pöllmann, Herbert, Schuckmann, Walter (2000) Serrabrancaite, MnPO4·H2O, a new mineral from the Alto Serra Branca pegmatite, Pedra Lavrada, Paraiba, Brazil. American Mineralogist, 85 (5) 847-849 doi:10.2138/am-2000-5-627
Mandarino, Joseph A. (2002) New minerals. The Canadian Mineralogist, 40 (4) 1215-1234 doi:10.2113/gscanmin.40.4.1215
Boonchom, Banjong, Youngme, Sujittra, Maensiri, Santi, Danvirutai, Chanaiporn (2008) Nanocrystalline serrabrancaite (MnPO4·H2O) prepared by a simple precipitation route at low temperature. Journal of Alloys and Compounds, 454. 78-82 doi:10.1016/j.jallcom.2006.12.064
Boonchom, Banjong, Danvirutai, Chanaiporn, Thongkam, Montree (2010) Non-isothermal decomposition kinetics of synthetic serrabrancaite (MnPO4 · H2O) precursor in N2 atmosphere. Journal of Thermal Analysis and Calorimetry, 99 (1) 357-362 doi:10.1007/s10973-009-0096-2
Localities for Serrabrancaite
Showing 11 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
Brazil | |
| Sergio Varvello collection |
| Sergio Varvello collection | |
| Sergio Varvello collection |
| Witzke et al. (2000) |
| Amores et al. (2014) |
Italy | |
| Kampf et al. (2025) |
Philippines | |
| Onac (2025) |
Poland | |
| Pieczka et al. (2015) +1 other reference |
Portugal | |
| Sergio Varvello collection +1 other reference |
Rwanda | |
| Lapis 35 (3) |
USA | |
| Michael Hatskel collection (ID by Dr. Lance Kearns and Betsy Martin) |
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Sítio do Castelo Mine, Folgosinho, Gouveia, Guarda, Portugal