ALMOST THERE!. Help us with a final push needed to keep mindat.org running. Click here to help.
Catawiki are hosting a mindat.org benefit auction. All proceeds to mindat.org! BID NOW
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat Articles
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Brackebuschite

This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About BrackebuschiteHide

Luis Brackebusch
Formula:
Pb2Mn3+(VO4)2(OH)
Colour:
Dark brown to black; reddish brown in transmitted light.
Lustre:
Sub-Vitreous, Resinous, Sub-Metallic
Hardness:
4 - 5
Specific Gravity:
6.05
Crystal System:
Monoclinic
Name:
Named by A. Döring in 1880 in honor of German mineralogist and geologist Ludwig Brackebusch (March 4, 1849 Nace en Northeim, Germany - June 2, 1906 Fallece en Hannover, Germany), Professor of Mineralogy, University of Córdoba (1875-1888), Córdoba, Argentina. He returned to Germany in 1888 and worked as a consulting geologist.
Brackebuschite Group. The Pb analogue of tokyoite, Mn analogue of calderónite, and Pb-Mn analogue of gamagarite. Chemically similar to krettnichite, paseroite, and pyrobelonite.

A rare secondary mineral occurring in the oxidized zones of hydrothermal Pb-Zn deposits.

Crystal structure details (Lafuente & Downs, 2016): (1) ccp set of O and Pb atoms; (2) chains of edge-sharing MnO6 octahedra, surrounded by 2 unique VO4 tetrahedra; (3) 1[MnO4/2O2/1] chain connected sharing vertex with one vanadate group; (4) second vanadate group sharing two vertices with two octahedra, thus forming Mn2V ring; (5) 1[Mn(VO4)2OH] chains, parallel to and twisted along [010]; (6) PbO8 and PbO11 polyhedra joining the previous chains; (7) one Pb and two Mn cations are bridged by OH group, which participates in a hydrogen bond with vanadate group of the adjacent chain.


Classification of BrackebuschiteHide

Approved, 'Grandfathered' (first described prior to 1959)
8.BG.05

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
G : With medium-sized and large cations, (OH, etc.):RO4 = 0.5:1
40.2.8.1

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O
21.4.18

21 : Vanadates (and vanadates with arsenate or phosphate)
4 : Vanadates of U, Mn, Fe or Ni

Physical Properties of BrackebuschiteHide

Sub-Vitreous, Resinous, Sub-Metallic
Transparency:
Translucent, Opaque
Colour:
Dark brown to black; reddish brown in transmitted light.
Streak:
Yellow
Hardness:
4 - 5 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Sub-Conchoidal
Density:
6.05 g/cm3 (Measured)    6.11 g/cm3 (Calculated)

Optical Data of BrackebuschiteHide

Type:
Biaxial (+)
RI values:
nα = 2.280 nβ = 2.360 - 2.380 nγ = 2.480 - 2.490
2V:
Calculated: 82° to 88°
Birefringence:
0.21
Max Birefringence:
δ = 0.200 - 0.210
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r > v strong
Optical Extinction:
X^a = 20°; Y=b
Pleochroism:
Visible
Comments:
X = Nearly colourless
Y = Dark reddish brown
Z = Reddish brown

Chemical Properties of BrackebuschiteHide

Formula:
Pb2Mn3+(VO4)2(OH)

Crystallography of BrackebuschiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Setting:
P21/m
Cell Parameters:
a = 8.88 Å, b = 6.155 Å, c = 7.681 Å
β = 111.5°
Ratio:
a:b:c = 1.443 : 1 : 1.248
Unit Cell V:
390.60 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals commonly acicular, elongated and striated parallel [010]; may be lathlike or wedge-shaped, flattened on {001}, with {100}, {001}, {011}, {102}, {103}, and others, perhaops without terminal faces; sprays, dendritic, botryoidal.
Comment:
β = 111.5 - 111.833; parameters from the refinement of Lafuente & Downs (2016): a=7.64920, b=6.12620, c=8.9241, β=112.1950

X-Ray Powder DiffractionHide

Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
d-spacingIntensity
4.95 (80)
3.25 (100)
3.08 (50)
2.98 (60)
2.76 (80)
2.13 (40)
1.720 (60)

Type Occurrence of BrackebuschiteHide

General Appearance of Type Material:
Dark brown elongated crystals
Place of Conservation of Type Material:
The Natural History Museum, London, England: #55819. Harvard University, Cambridge, Massachusetts, USA: #96255.
Geological Setting of Type Material:
Oxidized hydrothermal veins in a Pb-Zn deposit.
Associated Minerals at Type Locality:

Other Language Names for BrackebuschiteHide

Simplified Chinese:锰铁钒铅矿

Relationship of Brackebuschite to other SpeciesHide

Other Members of this group:
ArsenbrackebuschitePb2Fe3+(AsO4)2(OH)Mon. 2/m : P2/m
ArsentsumebitePb2Cu(AsO4)(SO4)(OH)Mon. 2/m : P21/m
BearthiteCa2Al(PO4)2(OH)Mon. 2/m : P21/m
BushmakinitePb2Al(PO4)(VO4)(OH)Mon. 2/m : P21/m
CalderónitePb2Fe3+(VO4)2(OH)Mon. 2/m : P21/m
CanosioiteBa2Fe3+(AsO4)2(OH)Mon. 2/m : P21/m
FeinglositePb2Zn(AsO4)2 · H2OMon. 2/m
FerribushmakinitePb2Fe3+(PO4)(VO4)(OH)Mon. 2/m : P21/m
GamagariteBa2Fe3+(VO4)2(OH)Mon. 2/m : P21/m
GoedkeniteSr2Al(PO4)2(OH)Mon. 2/m : P21/m
GrandaiteSr2Al(AsO4)2(OH)Mon. 2/m : P21/m
LombardoiteBa2Mn3+(AsO4)2(OH)Mon. 2/m : P21/m
TokyoiteBa2Mn3+(VO4)2(OH)Mon. 2/m : P21/m
TsumebitePb2Cu(PO4)(SO4)(OH)Mon. 2/m : P21/m
Unnamed (possible ordered As-analogue of Tokyoite)Ba2Mn[(As,V)O4]2(OH)Mon. 2/m : P21/m

Common AssociatesHide

CerussitePbCO3
DescloizitePbZn(VO4)(OH)
VanadinitePb5(VO4)3Cl
WulfenitePb(MoO4)
Associated Minerals Based on Photo Data:
Descloizite12 photos of Brackebuschite associated with Descloizite on mindat.org.
Krettnichite1 photo of Brackebuschite associated with Krettnichite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.BG.CanosioiteBa2Fe3+(AsO4)2(OH)Mon. 2/m : P21/m
8.BG.05ArsentsumebitePb2Cu(AsO4)(SO4)(OH)Mon. 2/m : P21/m
8.BG.05BearthiteCa2Al(PO4)2(OH)Mon. 2/m : P21/m
8.BG.05GamagariteBa2Fe3+(VO4)2(OH)Mon. 2/m : P21/m
8.BG.05GoedkeniteSr2Al(PO4)2(OH)Mon. 2/m : P21/m
8.BG.05UM1994-19-PO:CuHMoPbPb2Cu(PO4)(MoO4,AsO4,CrO4,GaO4)(OH)
8.BG.05TsumebitePb2Cu(PO4)(SO4)(OH)Mon. 2/m : P21/m
8.BG.05ArsenbrackebuschitePb2Fe3+(AsO4)2(OH)Mon. 2/m : P2/m
8.BG.05FeinglositePb2Zn(AsO4)2 · H2OMon. 2/m
8.BG.05BushmakinitePb2Al(PO4)(VO4)(OH)Mon. 2/m : P21/m
8.BG.05TokyoiteBa2Mn3+(VO4)2(OH)Mon. 2/m : P21/m
8.BG.05CalderónitePb2Fe3+(VO4)2(OH)Mon. 2/m : P21/m
8.BG.10MélonjosephiteCaFe2+Fe3+(PO4)2(OH)
8.BG.15TancoiteLiNa2Al(PO4)(HPO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pbca

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

40.2.8.2ArsenbrackebuschitePb2Fe3+(AsO4)2(OH)Mon. 2/m : P2/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

21.4.1UvaniteU6+2V5+6O21 · 15H2O (?)Orth.
21.4.2Vanuranylite(H3O)2(UO2)2(VO4)2 · 4H2O
21.4.3StrelkiniteNa2(UO2)2(VO4)2 · 6H2OOrth.
21.4.4CarnotiteK2(UO2)2(VO4)2 · 3H2OMon. 2/m : P21/b
21.4.5Margaritasite(Cs,K,H3O)2(UO2)2(VO4)2 · H2OMon. 2/m : P21/b
21.4.6SengieriteCu2(UO2)2(VO4)2 · 6H2OMon. 2/m : P21/b
21.4.7MetatyuyamuniteCa(UO2)2(VO4)2 · 3-5H2OOrth. mmm (2/m 2/m 2/m)
21.4.8TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2OOrth. mmm (2/m 2/m 2/m) : Pnna
21.4.9RauviteCa(UO2)2(V10O28) · 16H2O
21.4.10FrancevilliteBa(UO2)2(VO4)2 · 5H2OOrth.
21.4.11MetavanuraliteAl(UO2)2(VO4)2(OH) · 8H2OTric.
21.4.12VanuraliteAl(UO2)2(V2O8)(OH) · 11H2OMon.
21.4.13CurienitePb(UO2)2(VO4)2 · 5H2OOrth.
21.4.14FritzscheiteMn(UO2)2(PO4,VO4)2 · 10H2O (?)Tet.
21.4.15Palenzonaite(Ca,Na)3CaMn2+2(VO4)3Iso. m3m (4/m 3 2/m) : Ia3d
21.4.16Santafeite(Na,Ca,Sr)12(Mn2+,Fe3+,Al,Mg)8Mn4+8(VO4)16(OH,O)20 · 8H2OOrth. mmm (2/m 2/m 2/m)
21.4.17PyrobelonitePbMn2+(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
21.4.19ČechitePbFe2+(VO4)(OH)Orth. mmm (2/m 2/m 2/m)
21.4.20HeyitePb5Fe2+2(VO4)2O4Mon.
21.4.21MounanaitePbFe3+2(VO4)2(OH,F)2Mon. 2/m : B2/m
21.4.22SchubneliteFe3+VO4 · H2OTric.
21.4.23FervaniteFe3+4V5+4O16 · 5H2OMon.
21.4.24KazakhstaniteFe3+5V4+3V5+12O39(OH)9 · 9H2OMon.
21.4.25Bokite(Al,Fe3+)1.3(V5+,V4+,Fe3+)8O20 · 7.4H2OMon.
21.4.26Rusakovite(Fe3+,Al)5(VO4,PO4)2(OH)9 · 3H2O
21.4.27KolovratiteNixZny(VO4)0.67(x+y) · nH2O

Fluorescence of BrackebuschiteHide

Not fluorescent

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 BrackebuschiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Rammelsberg (1880) Zeitschrift der Deutsche geologische Gesellschaft, Berlin: 32: 711 (cites Doering).
Doering (1883) Bol. ac. cienc. Córdoba: 5: 501.
Larsen, E.S. and Berman, H. (1934) The Microscopic Determination of the Nonopaque Minerals, Second edition, USGS Bulletin 848: 146.
Berry, L.G. and A.R. Graham (1948) X-ray measurements on brackebuschite and hematolite. American Mineralogist: 33: 489–495.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 1052-1053.
Donaldson, D.M. and W.H. Barnes (1955) The structures of the minerals of the descloizite and adelite groups: III –
brackebuschite. American Mineralogist: 40: 597-613.
Fanfani, L. and P.F. Zanazzi (1967) Structural similarities of some secondary lead minerals. Mineralogical Magazine, 36, 522–529.
Symes, R.F. and S.A. Williams (1973) Heyite and brackebuschite compared. Mineralogical Magazine, 39, 69–73.
Foley, J. A., Hughes, J. M. and Lange, D. (1997): The atomic arrangement of brackebuschite, redefined as Pb2(Mn3+,Fe3+)(VO4)2(OH), and comments on Mn3+ octahedra: Canadian Mineralogist: 35, 1027-1033.
Lafuente, B. & Downs, R.T. (2016): Redetermination of brackebuschite, Pb2Mn3+(VO4)2(OH). Acta Crystallographica: E72: 293-296; http://forum.amiminerals.it/viewtopic.php?f=5&t=12550 (2016)

Internet Links for BrackebuschiteHide

Localities for BrackebuschiteHide

ⓘ - 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.
Argentina
 
  • Córdoba
    • Minas Department
Sureda (1978): Revista de la Asociacion Geologica Argentina 33(4):299-324
    • Punilla Department
      • Sierra de Córdoba
        • El Guaico District
          • Venus Pb-Zn deposit
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1053; Mineralogical Magazine (1973): 39: 69; Canadian Mineralogist (1997): 35: 1027; Lapis (2004): 29(1): 46.
China
 
  • Hunan Province
    • Hengyang Prefecture
      • Nanyue District
Guangming Yang (1980): Geology and Prospecting 16(7), 35-40
Democratic Republic of the Congo
 
  • Kinshasa City
Handbook of Mineralogy
Gabon
 
  • Haut-Ogooué Province
    • Franceville
P. Bariand et al. , Bull. Soc. Franç. Minéral. Cristal. , 1963, LXXXVI, pp. 117-120.
Germany
 
  • Saarland
    • Wadern
      • Krettnich
[European Journal of Mineralogy 13:145-158]
  • Thuringia
    • Harz
      • Nordhausen
        • Ilfeld
J. Gröbner, U. Kolitsch and J. Wesiger (2011): New finds of vanadate and rare-earth minerals from the manganese mine Ilfeld, Harz. Mineralien-Welt 22 (1), 41-49. (in German)
Spain
 
  • Andalusia
    • Almería
      • Níjar
        • Rodalquilar
J Gröbner collection
    • Córdoba
      • Fuente Obejuna (Fuenteovejuna)
Carmona Ruiz, A.; Ramos Márquez, I.; Menor Salván, C. (2016). Grupo Minero de Navalespino y mina “La Solución”, Fuente Obejuna (Córdoba): historia, explotación y mineralogía. Acopios, 7. Pp. 21-227
USA
 
  • Arizona
    • Cochise Co.
      • Swisshelm Mts
        • Swisshelm District
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 144.
      • Tombstone Hills
        • Tombstone District
Ron Layton self collected
Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 77.
    • Gila Co.
      • Dripping Spring Mts
        • Banner District
          • Christmas area
            • Christmas
Rruff project. Raman and XRD analyzed.; Bob Meyer (2011) The Micro Mineral Collector. Friends of Mineralogy - Pacific Northwest Chapter Newsletter
    • Santa Cruz Co.
      • Patagonia Mts
        • Palmetto District
          • Fresno Canyon
            • Tres de Mayo Mine group
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 144.
  • Colorado
    • Montrose Co.
      • Uravan District
        • Paradox Valley
http://rruff.geo.arizona.edu/doclib/hom/brackebuschite.pdf
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2018, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: December 13, 2018 16:15:29 Page generated: November 18, 2018 02:14:29
Go to top of page