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Brugnatellite

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Formula:
Mg6Fe3+(CO3)(OH)13 · 4H2O
System:
Hexagonal
Colour:
Flesh-pink to yellowish ...
Lustre:
Pearly
Hardness:
2
Name:
After Ligi Brugnatelli (1859-1928), Professor of Mineralogy, University of Pavia, Italy.
As part of the recent re-evaluation of the nomenclature of the hydrotalcite supergroup (Mills et al., 2012), brugnatellite, originally a grandfathered species, was identified as a questionable species which needs further investigation.

[Possibly identical to pyroaurite? X-ray powder diffraction pattern is very similar, and space group of brugnatellite is not known; given stoichiometry does not fit other members of the manasseite group; no modern investigation has been carried out (Comment by U. Kolitsch 2007)]

Classification of Brugnatellite

Questionable/Doubtful 2012
5.DA.45

5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
A : With medium-sized cations
16b.7.5.1

16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
7 : Miscellaneous
11.13.4

11 : Carbonates
13 : Carbonates of Fe
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First Recorded Occurrence of Brugnatellite

Year of Discovery:
1909

Physical Properties of Brugnatellite

Pearly
Diaphaneity (Transparency):
Transparent
Colour:
Flesh-pink to yellowish or brownish-white.
Streak:
White
Hardness (Mohs):
2
Cleavage:
Perfect
{0001}
Density:
2.14 g/cm3 (Measured)    2.21 g/cm3 (Calculated)

Crystallography of Brugnatellite

Crystal System:
Hexagonal
Cell Parameters:
a = 5.48Å, c = 16Å
Ratio:
a:c = 1 : 2.92
Unit Cell Volume:
V 416.11 ų (Calculated from Unit Cell)
Morphology:
Massive. Lamellar or foliated masses of small flakes flattened {0001}. Individual flakes have a three- or six-sided outline with striations intersecting at 60°.

Optical Data of Brugnatellite

Type:
Uniaxial (-)
RI values:
nω = 1.540 nε = 1.510
Max Birefringence:
δ = 0.030
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Low
Pleochroism:
Visible
Comments:
O = yellowish red
E = colourless

Chemical Properties of Brugnatellite

Formula:
Mg6Fe3+(CO3)(OH)13 · 4H2O
Essential elements:
All elements listed in formula:

Relationship of Brugnatellite to other Species

Other Members of Group:
5.DA.05DypingiteMg5(CO3)4(OH)2 · 5H2O
5.DA.05GiorgiositeMg5(CO3)4(OH)2 · 5-6H2O
5.DA.05HydromagnesiteMg5(CO3)4(OH)2 · 4H2O
5.DA.05WidgiemoolthaliteNi5(CO3)4(OH)2 · 5H2O
5.DA.05UM1986-10-CO:ClHMgMnZnMg5(Zn,Mn)3(CO3)2(OH,Cl)12 · H2O
5.DA.05UM1987-01-CO:HMgSMg4(CO3)2(OH)2 · 6H2O ?
5.DA.10ArtiniteMg2(CO3)(OH)2 · 3H2O
5.DA.10IndigiriteMg2Al2(CO3)4(OH)2 · 15H2O
5.DA.10ChlorartiniteMg2(CO3)(OH)Cl · 2H2O
5.DA.15OtwayiteNi2(CO3)(OH)2 · H2O
5.DA.15ZaratiteNi3(CO3)(OH)4 · 4H2O
5.DA.20KambaldaiteNaNi4(CO3)3(OH)3 · 3H2O
5.DA.25CallaghaniteCu2Mg2(CO3)(OH)6 · 2H2O
5.DA.30Claraite(Cu,Zn)3(CO3)(OH)4 · 4H2O
5.DA.35HydroscarbroiteAl14(CO3)3(OH)36 · nH2O
5.DA.35ScarbroiteAl5(CO3)(OH)13 · 5H2O
5.DA.40CaresiteFe42+Al2(OH)12[CO3] · 3H2O
5.DA.40QuintiniteMg4Al2(OH)12[CO3] · 3H2O
5.DA.40CharmariteMn42+Al2(OH)12[CO3] · 3H2O
5.DA.45Stichtite-2HMg6(Cr,Al)2(CO3)(OH)16 · 4H2O
5.DA.45ChlormagaluminiteMg4Al2(OH)12Cl2 · 3H2O
5.DA.45Hydrotalcite-2HMg6Al2(CO3)(OH)16 · 4H2O
5.DA.45Pyroaurite-2HMg6Fe23+(OH)16(CO3) · 4H2O
5.DA.45ZaccagnaiteZn4Al2(OH)12[CO3] · 3H2O
5.DA.50ComblainiteNi4Co2(OH)12[CO3] · 3H2O
5.DA.50DesautelsiteMg6Mn23+(OH)16[CO3] · 4H2O
5.DA.50HydrotalciteMg6Al2(OH)16[CO3] · 4H2O
5.DA.50Pyroaurite-3RMg6Fe23+(OH)16[CO3] · 4H2O
5.DA.50ReevesiteNi6Fe23+(OH)16(CO3) · 4H2O
5.DA.50StichtiteMg6Cr2(OH)16[CO3] · 4H2O
5.DA.50TakoviteNi6Al2(OH)16[CO3] · 4H2O
5.DA.50UM1998-10-CO:CoHNiCo6Fe2(CO3)(OH)16 · 4H2O ?
5.DA.55CoalingiteMg10Fe23+(OH)24[CO3] · 2H2O
11.13.1SideriteFeCO3
11.13.2Pyroaurite-3RMg6Fe23+(OH)16[CO3] · 4H2O
11.13.3Pyroaurite-2HMg6Fe23+(OH)16(CO3) · 4H2O
11.13.5CoalingiteMg10Fe23+(OH)24[CO3] · 2H2O
11.13.6AnkeriteCa(Fe2+,Mg)(CO3)2

Other Names for Brugnatellite

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 Brugnatellite

Reference List:
Artini (1909), Reale academia dei Lincei: 18(5): 3.

Artini (1922), Reale academia dei Lincei: 31: 491.

Fenoglio M. – (1938) Ricerche sulla brugnatellite. Periodico di Mineralogia – Roma: 9: 1-13.

Frondel (1941),Constitution and polymorphism of the pyroaurite and sjögrenite groups, American Mineralogist: 26: 295.

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 660-661.

Mills, S.J., Christy, A.G., Genin, J.-M.R., Kameda, T., Colombo, F. (2012): Nomenclature of the hydrotalcite supergroup: natural layered double hydroxides. Mineralogical Magazine, 76, 1289-1336.

Internet Links for Brugnatellite

Localities for Brugnatellite

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.
Austria
 
  • Styria
    • Fischbacher Alpen
      • St. Jakob-Breitenau
        • Eibegggraben
Bojar, H.-P. & Postl, W. (2005)
    • Knittelfeld
      • St Lorenzen bei Knittelfeld
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
Canada
 
  • Manitoba
    • Thompson Nickel Belt
      • Moab-Setting Lakes area
Richard Gunter photo and specimen (XRD identified)
  • Ontario
    • Hastings Co.
      • Dungannon Township
MSC Report 39; Sabina, A.P. (1982): Some rare minerals of the Bancroft area. Mineralogical Record 13 (4), 226-228
  • Québec
    • Estrie
      • Les Sources RCM
        • Asbestos
HORVÁTH, L., PFENNINGER-HORVÁTH, E. and SPERTINI, F. (2013) The Jeffrey mine, Asbestos, Québec, Canada: A mineralogical review. Mineralogical Record, 44, 375-417.
Czech Republic
 
  • Moravia (Mähren; Maehren)
    • South Moravia Region
      • Oslavany
        • Hrubšice
Kovář, O., Losos, Z., Houzar, S., Zeman, J., 2008: Hydromagnezit, brugnatellit a coalingit v minerální asociasi puklin serpentinitu z kamenolomu „U Pustého mlýna“ u Hrubšic, moldanubikum, západní Morava. – Acta. Mus. Moraviae, Sci. geol., 93: 19-35.
Italy
 
  • Aosta Valley
    • Cogne Valley
      • Cogne
C.M. Gramaccioli (1975)-Minerali alpini e Prealpini-Edizioni Atlas Bergamo
    • Montjovet
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
C.M. Gramaccioli (1975)-Minerali alpini e Prealpini-Edizioni Atlas Bergamo
  • Emilia-Romagna
    • Parma Province
      • Taro Valley
        • Borgo Val di Taro
Pellecchia, M. & Mavris, C. (2012): Artinite e altri carbonati nella valle del fiume Taro, Parma. Rivista Mineralogica Italiana, 1/2012, 10-17.
  • Liguria
    • Genova Province
      • Genova
        • Borzoli
Giuseppe Pipino - L'antica miniera di Monte Ramazzo e i suoi minerali - Rivista Mineralogica Italiana, Milano, vol. 8, fasc. 3, 1977
Ciriotti, M.E., Blaß, G. (2010): Pot-pourri 2009: Identificazioni UKiS AMI, Minerali italiani di interesse. Micro, 1/2010, 124-127
  • Lombardy
    • Sondrio Province
      • Valtellina
          • Torre di Santa Maria
            • Ciappanico
Atini, E., Atti Accad. Lincei, Roma, 18, 5,3 (1909).
Gramaccioli, C.M. (1975) Minerali alpini e prealpini. Istituto Italiano Edizioni Atlas, Bergamo, 2 vol., 472 pp. AA. VV., 1996. Collezionare minerali. Hobby & Work
  • Piedmont
    • Torino Province
      • Lanzo Valleys
        • Ala Valley
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
        • Viù Valley
          • Viù
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Japan
 
  • Hokkaido
    • Kamikawa Province
      • Nakagawa-cho
Yamada, S. (2004) Nihonsan-koubutsu Gojuon-hairetsu Sanchi-ichiranhyou (111 pp.)
  • Kyushu Region
    • Fukuoka Prefecture
      • Iizuka City
Dr. Matsuo Nambu collection (curated by the Geological Survey of Japan)
Handbook of Mineralogy
New Zealand
 
  • North Island
    • Manawatu-Wanganui
      • Tararua
        • Maharahara
Railton, G.L. & Watters, W.A., Minerals of New Zealand, New Zealand Geological Survey Bull. #104 (1990).
North Korea
 
  • South Hwanghae Province
    • Pyongsan-gun
      • Pongsan-myon
        • Namchol-li
Kinosaki, Y. (1941) Jour. Min. Soc. Korea, 24, 12.
Sweden
 
  • Värmland
    • Filipstad
Kjell Gatedal
UK
 
Tindle, A.G. (2008) Minerals of Britian and Ireland
    • Shetland Islands
      • Unst
Livingstone, 2002, p. 160
USA
 
  • Colorado
    • Gunnison Co.
      • White Earth District (Powderhorn District)
Minerals of Colorado (1997) Eckels, E. B.; USGS ProfessionaL Paper 197A
Mineral and/or Locality  
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