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Luigi Valentino Brugnatelli [1859-1928]
Mg6Fe3+(CO3)(OH)13 · 4H2O
Pink to yellowish or ...
Named in 1909 by Ettore Artini in honor of Luigi Valentino 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

Approved, 'Grandfathered' (first described prior to 1959), Questionable
First Published:

D : Carbonates with additional anions, with H2O
A : With medium-sized cations

7 : Miscellaneous

11 : Carbonates
13 : Carbonates of Fe

Type Occurrence of Brugnatellite

Physical Properties of Brugnatellite

Diaphaneity (Transparency):
Transparent, Translucent
Pink to yellowish or brownish-white.
Hardness (Mohs):
2.14 g/cm3 (Measured)    2.21 g/cm3 (Calculated)

Crystallography of Brugnatellite

Crystal System:
Cell Parameters:
a = 5.48Å, c = 16.0Å
a:c = 1 : 2.92
Unit Cell Volume:
V 416.11 ų (Calculated from Unit Cell)
Massive. Lamellar or foliated masses of small flakes flattened {0001}. Individual flakes have a three- or six-sided outline with striations intersecting at 60°.
X-Ray Powder Diffraction Data:
7.93 (100)
3.96 (90)
2.63 (50)
2.35 (60)
2.00 (70)
1.78 (20)
1.69 (30)
1.56 (40)
1.53 (40)
1.51 (10)
1.45 (10)
1.34 (10)
1.30 (20)
1.23 (10)
1.14 (10)
1.08 (10)
ICDD 14-365

Optical Data of Brugnatellite

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:
Optical Extinction:
O = yellowish red
E = colourless

Chemical Properties of Brugnatellite

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

Relationship of Brugnatellite to other Species

Other Members of Group:
CoalingiteMg10Fe23+(OH)24[CO3] · 2H2O
Cualstibite GroupA group within the Hydrotalcite supergroup characterized by (M2+,M3+)(OH)2 brucite-type sheets, in which M2+ ...
Fougèrite Group
Glaucocerinite Group
Hydrocalumite Group
Hydrotalcite GroupMg6R23+(OH)16CO3·4H2O, where R3+ = Al, Cr, or Fe
MuskoxiteMg7Fe4O13 · 10H2O
Quintinite Group
Wermlandite Group
Woodwardite GroupMay be considered a subgroup of the Hydrotalcite 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.50PyroauriteMg6Fe23+(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
11.13.2PyroauriteMg6Fe23+(OH)16[CO3] · 4H2O
11.13.3Pyroaurite-2HMg6Fe23+(OH)16(CO3) · 4H2O
11.13.5CoalingiteMg10Fe23+(OH)24[CO3] · 2H2O

Other Names for Brugnatellite

Name in Other Languages:

Other Information

Not fluorescent in UV
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 URL:
Please feel free to link to this page.

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.
  • 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)
  • 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.
    • Laurentides
      • Antoine-Labelle RCM
Handbook of Mineralogy
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.
  • 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
          • Roccamurata
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
          • Lanterna Valley
            • Lanzada
Handbook of Mineralogy
          • 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.
  • Hokkaido
    • Kamikawa Province
      • Nakagawa-cho
Yamada, S. (2004) Nihonsan-koubutsu Gojuon-hairetsu Sanchi-ichiranhyou (111 pp.)
  • Honshu Island
    • Chubu Region
      • Aichi Prefecture
        • Shinshiro city
Suzuki, J., Ito, M. (1973) A new magnesium carbonate hydrate mineral, Mg5(CO3)4(OH)2.8H2O, from Yoshikawa, Aichi Prefecture, Japan. J. Japan Assoc. Mineral. Petrol. Econ. Geol.: 68: 353-361.
      • Gifu Prefecture
        • Kiyomimura
Handbook of Mineralogy
      • Shizuoka prefecture
        • Hamamatsu City
          • Inasa-cho
Handbook of Mineralogy
  • Kyushu Region
    • Fukuoka Prefecture
      • Iizuka City
Dr. Matsuo Nambu collection (curated by the Geological Survey of Japan)
Handbook of Mineralogy
    • Kumamoto Prefecture
Handbook of Mineralogy
  • Shikoku Island
    • Ehime Prefecture
      • Shikokuchuo City
        • Doi
Handbook of Mineralogy
  • Anti-Atlas Mtn
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.
  • Telemark
    • Kragerø
Handbook of Mineralogy
  • Värmland
    • Filipstad
Kjell Gatedal
Tindle, A.G. (2008) Minerals of Britian and Ireland
    • Shetland Islands
      • Unst
Livingstone, 2002, p. 160
  • Colorado
    • Gunnison Co.
      • White Earth District (Powderhorn District)
Minerals of Colorado (1997) Eckels, E. B.; USGS ProfessionaL Paper 197A
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