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Brandholzite

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Formula:
MgSb2(OH)12 · 6H2O
System:
Trigonal
Colour:
Colourless
Lustre:
Vitreous
Hardness:
2 - 3
Name:
Named after the type locality - the former mining district of Brandholz-Goldkronach, Fichtelgebirge, Germany.
This page provides mineralogical data about Brandholzite.


Classification of Brandholzite

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 Brandholzite

Vitreous
Colour:
Colourless
Hardness (Mohs):
2 - 3

Optical Data of Brandholzite

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 Brandholzite

IMA Formula:
MgSb2(OH)12 · 6H2O
Elements listed in formula:

Crystallography of Brandholzite

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 Volume:
V 2,220.42 ų (Calculated from Unit Cell)

Type Occurrence of Brandholzite

Relationship of Brandholzite to other Species

Other Names for Brandholzite

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 Brandholzite

Reference List:
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 Brandholzite

mindat.org URL:
https://www.mindat.org/min-7046.html
Please feel free to link to this page.
Specimens:
The following Brandholzite specimens are currently listed for sale on minfind.com.

Localities for Brandholzite

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.
Australia
 
  • South Australia
    • Flinders Ranges
      • North Flinders Ranges
        • Leigh Creek
          • Lyndhurst
            • Nichol Nob
Handbook of Mineralogy
    • Olary Province
      • Mt Victor Plumbago Station
Handbook of Mineralogy
Austria
 
  • Carinthia
    • Friesach - Hüttenberg area
Handbook of Mineralogy
Canada
 
  • Ontario
    • Algoma District
Handbook of Mineralogy
  • Saskatchewan
    • Beaverlodge Lake area
Handbook of Mineralogy
France
 
  • Bourgogne-Franche-Comté
    • Haute-Saône
Handbook of Mineralogy
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)]
Morocco
 
  • Drâa-Tafilalet Region
    • Ouarzazate Province
      • Tazenakht
Handbook of Mineralogy
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.
South Africa
 
  • Transvaal
Handbook of Mineralogy
Spain
 
  • Andalusia
    • Córdoba
Handbook of Mineralogy
Handbook of Mineralogy
        • Sierra Albarrana
Handbook of Mineralogy
Switzerland
 
  • Wallis (Valais)
    • Binn Valley
      • Fäld (Imfeld; Im Feld; Feld)
Handbook of Mineralogy
USA
 
  • California
    • Mono Co.
      • Sweetwater Mts (Sweetwater Range)
        • West Walker District (West Walker River District)
Handbook of Mineralogy
    • San Bernardino Co.
Handbook of Mineralogy
  • Colorado
    • Chaffee Co.
      • Nathrop
        • Upper Browns Creek area
Handbook of Mineralogy
  • Idaho
    • Custer Co.
Handbook of Mineralogy
  • Pennsylvania
    • Carbon Co.
      • Jim Thorpe (Mauch Chunk)
Handbook of Mineralogy
Mineral and/or Locality  
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