Brugnatellite Mineral Data
General Brugnatellite Information
Chemical Formula:
Mg6Fe+++(CO3)(OH)13•4(H2O)
Composition:
Molecular Weight = 554.84 gm
Magnesium 26.28 % Mg 43.58 % MgO
Iron 10.07 % Fe 14.39 % Fe2 O3
Hydrogen 3.81 % H 34.09 % H2 O
Carbon 2.16 % C 7.93 % CO2
Oxygen 57.67 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Mg6 Fe3+ (CO3 )(OH)13 •4(H2 O)
Environment:
In serpentinites.
IMA Status:
Valid Species (Pre-IMA) 1909
Locality:
Asbestos mine at Torre Santa Maria, Val Malenco. Lombardy, Italy. Link to MinDat.org Location Data.
Name Origin:
Named after Luigi Brugnatelli (1859-1928), mineralogist, University of Pavia, Italy.
Name Pronunciation:
Brugnatellite + Pronunciation
Brugnatellite Image
Images:
Brugnatellite Crystallography
Axial Ratios:
a:c = 1:2.9197
Cell Dimensions:
a = 5.48, c = 16, Z = 1; V = 416.11 Den(Calc)= 2.21
Crystal System:
Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 63 /mmc
X Ray Diffraction:
By Intensity(I/Io ): 7.93(1), 3.96(0.9), 2(0.7),
Physical Properties of Brugnatellite
Cleavage:
{0001} Perfect
Color:
Brown white, Brownish pink, Yellow brown, Pink.
Density:
2.14
Diaphaneity:
Transparent
Habit:
Massive - Lamellar - Distinctly foliated fine-grained forms.
Habit:
Micaceous - Platy texture with "flexible" plates.
Hardness:
2 - Gypsum
Luster:
Vitreous - Pearly
Streak:
white
Optical Properties of Brugnatellite
Gladstone-Dale:
CI meas = 0.075 (Fair) - where the CI = (1-KPDmeas /KC ) CI calc = 0.104 (Poor) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2376,KPDmeas = 0.2453,KC = 0.2652 Ncalc = 1.57 - 1.59
Optical Data:
Uniaxial (-), e=1.51, w=1.54, bire=0.0300.
Calculated Properties of Brugnatellite
Electron Density:
Bulk Density (Electron Density)=2.20 gm/cc note: Specific Gravity of Brugnatellite =2.14 gm/cc.
Fermion Index:
Fermion Index = 0.02 Boson Index = 0.98
Photoelectric:
PEBrugnatellite = 3.57 barns/electronU=PEBrugnatellite x r Electron Density= 7.85 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Brugnatellite is Not Radioactive
Brugnatellite Classification
Dana Class:
16b.07.05.01 (16b) Carbonates - Hydroxyl or Halogen
(16b.07) Dana Type
(16b.07.05) Dana Group
16b.07.05.01 Brugnatellite Mg6Fe(CO3)(OH)13•4(H2O) P 63 /mmc 6/m 2/m 2/m
Strunz Class:
05.DA.45 05 - CARBONATES (NITRATES)
05.D - Carbonates with Additional Anions, with H2O
05.DA -With medium-sized cations
05.DA.45 Brugnatellite Mg6Fe(CO3)(OH)13•4(H2O) P 63 /mmc 6/m 2/m 2/m
05.DA.45 Barbertonite Mg6Cr2(CO3)(OH)16•4(H2O) P 63 /mmc 6/m 2/m 2/m
05.DA.45 Chlormagaluminite (Mg,Fe)4Al2(OH)12(Cl2,CO3)•2(H2O) P 6/mcm, P 6cm, P 6 c2 Hex
05.DA.45 Zaccagnaite ! Zn4Al2(OH)12(CO3)•3(H2O) P 63 /mmc 6/m 2/m 2/m
05.DA.45 Manasseite Mg6Al2(CO3)(OH)16•4(H2O) P 63 /mmc 6/m 2/m 2/m
05.DA.45 Sjogrenite Mg6Fe2(CO3)(OH)16•4(H2O) P 63 /mmc 6/m 2/m 2/m
Other Brugnatellite Information
References:
NAME( Ford32) PHYS. PROP.(Dana8) OPTIC PROP.(Ford32)
See Also:
Links to other databases for Brugnatellite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
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Print or Cut-and-Paste your Brugnatellite Specimen Label here :
Brugnatellite
Mg6Fe+++(CO3)(OH)13•4(H2O)
Dana No: 16b.07.05.01 Strunz No: 05.DA.45
Locality:
Notes:
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