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Brandholzite

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Formula:
Mg[Sb(OH)6]2 · 6H2O
Colour:
Colourless
Lustre:
Vitreous
Hardness:
2 - 3
Crystal System:
Trigonal
Name:
Named after the type locality - the former mining district of Brandholz-Goldkronach, Fichtelgebirge, Germany.
This page provides mineralogical data about Brandholzite.


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Classification of BrandholziteHide

Approved
Approval Year:
1998
4.FH.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
H : Hydroxides with H2O +- (OH); insular octahedra

Physical Properties of BrandholziteHide

Vitreous
Colour:
Colourless
Hardness:
2 - 3 on Mohs scale

Optical Data of BrandholziteHide

Type:
Uniaxial (-)
RI values:
nω = 1.570 nε = 1.569
Max Birefringence:
δ = 0.001
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low

Chemical Properties of BrandholziteHide

Formula:
Mg[Sb(OH)6]2 · 6H2O
IMA Formula:
MgSb2(OH)12 · 6H2O

Crystallography of BrandholziteHide

Crystal System:
Trigonal
Class (H-M):
3 - Pyramidal
Space Group:
P3
Cell Parameters:
a = 16.119 Å, c = 9.868 Å
Ratio:
a:c = 1 : 0.612
Unit Cell V:
2,220.42 ų (Calculated from Unit Cell)

Type Occurrence of BrandholziteHide

Synonyms of BrandholziteHide

Other Language Names for BrandholziteHide

Relationship of Brandholzite to other SpeciesHide

Other Members of this group:
BottinoiteNi2+[Sb(OH)6]2 · 6H2OTrig. 3 : P3

Common AssociatesHide

Associated Minerals Based on Photo Data:
Stibnite1 photo of Brandholzite associated with Stibnite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

4.FH.05BottinoiteNi2+[Sb(OH)6]2 · 6H2OTrig. 3 : P3

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 BrandholziteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Friedrich, A., Wildner, M. and Tillmanns, E. (1998): Strukturuntersuchung und Kristallchemie des neuen Minerals Mg(H2O)6[Sb(OH)6]2 sowie einiger isotyper synthetischer Antimonate MeII(H2O,NH3)6[Sb(OH)6]2 (MeII = Mg, Co, Cu). Mitt. Österr. Mineral. Ges.143, 276-278.
Friedrich, A., Wildner, M., Tillmanns, E. & Merz, P. L. (2000): Crystal chemistry of the new mineral brandholzite, Mg(H2O)6[Sb(OH)6]2, and of the synthetic analogues M2+(H2O)6[Sb(OH)6]2 (M2+ = Mg, Co). American Mineralogist: 85, 593-599.
Friedrich, A., Mazzi, F., Wildner, M. & Tillmanns, E. (2003): Isotypism of Co(H2O)6[Sb(OH)6]2 with brandholzite and bottinoite. American Mineralogist 88, 462-463.
Sejkora, J., Ozdín, D., Ďuďa, R. (2010): The supergene mineral association with brandholzite from Pernek, Malé Karpaty Mountains, Slovak Republic. Journal of Geosciences, 55, 149-160. [http://www.jgeosci.org/content/jgeosci.064_2010_2_sejkora.pdf]
http://www.goldbergknappen.de/html/brandholzit.html [type locality = Schmidten shaft area]

Internet Links for BrandholziteHide

Localities for BrandholziteHide

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.
Germany (TL)
 
  • Bavaria
    • Franconia
      • Fichtelgebirge
        • Brandholz - Goldkronach District
          • Fürstenzeche
[Mitt.d.Österr.Min.Ges.(1998) 143, 276-278; MinRec 32:210; http://www.goldbergknappen.de/html/brandholzit.html (Schmidten shaft = Type locality)
Meier, S. (1995). Mineralfundstellen im Fichtelgebirge. Eigenverlag, Marktredwitz, 220 p.
Italy
 
  • Tuscany
    • Lucca Province
      • Apuan Alps
        • Stazzema
- Orlandi, P. (2011): Zibaldone di mineralogia italiana 2010: parte seconda. Micro, 3/2011, 98-100. - Orlandi, P., Biagioni, C. & Michelucci, E. (2013). Brandholzite. Primo ritrovamento italiano nella miniera del Bottino, Alpi Apuane. Rivista Mineralogica Italiana, 2/2013, 130-134.
Luxembourg
 
  • Diekirch District
    • Wiltz
      • Goesdorf commune
        • Goesdorf
Bakker, R. and Kolitsch, U. (2010): Die Antimon-Grube von Goesdorf in Luxemburg: das weltweit dritte Vorkommen von Brandholzit. Lapis 35 (6), 30; 43-45; 70. (in German); [Filella M., Philippo S., Belzile N., Chen Y. and Quentel F. (2009) Natural attenuation processes applying to antimony: A study in the abandoned antimony mine in Goesdorf, Luxembourg - Science of the total environment (in press)]
Slovakia
 
  • Bratislava Region
    • Malacky Co.
      • Pernek
Frost, R. L., Čejka, J., Sejkora, J., Ozdín, D., Bahfenne, S., Keeffe, E. C. (2009): Raman spectroscopic study of the antimonite mineral brandholzite Mg[Sb2(OH)12]•6H2O. J. Raman Spectroscopy, 40, 11, 1907-1910. Ozdín D. (2009): Brandholzit. Ochrana prírody Slovenska, 4, 3rd and 4th cover page. Sejkora S., Ozdín D., Vitáloš J., Tuček P., Ďuďa R. (2004): Schafarzikit von Pernek, Revier Pezinok (Slowakei). Lapis, 29, 12, 27-36. Sejkora, J., Ozdín, D., Ďuďa, R. (2010): The supergene mineral association with brandholzite from Pernek, Malé Karpaty Mountains, Slovak Republic. Journal of Geosciences, 55 149-160.
    • Pezinok Co.
      • Pezinok
Števko M., Tuček P., Vitáloš J., 2012: Nález brandholzitu na antimonitovom ložisku Pezinok-Kolársky vrch. Minerál, 20, 2, 165-167 (in Slovak). Stevko M., Tucek P., Vitálos J. (2012): Pezinok: Die weltbesten Kermesite und Brandholzite aus der Slowakei. Lapis 37 (10), 40-41, 56-57; 90 (in German). Majzlan J., Števko M., Lánczoš T. (2016): Soluble secondary minerals of antimony in Pezinok and Kremnica (Slovakia) and the question of mobility or immobility of antimony in mine waters. Environmental Chemistry, 13, 6, 927-935.
Mineral and/or Locality  
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