Mineralogy Database

Surinamite Mineral Data

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General Surinamite Information

Help on Chemical  Formula: Chemical Formula: (Mg,Fe++)3Al4BeSi3O16
Help on Composition: Composition: Molecular Weight = 553.76 gm
   Magnesium   9.88 %  Mg   16.38 % MgO
   Beryllium   1.63 %  Be    4.52 % BeO
   Aluminum   19.49 %  Al   36.83 % Al2O3
   Iron        7.56 %  Fe    9.73 % FeO
   Silicon    15.22 %  Si   32.55 % SiO2
   Oxygen     46.23 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg2.25Fe2+0.75Al4BeSi3O16
Help on Environment: Environment: In mylonitic mesoperthite gneiss, probably formed during high-pressure granulite facies metamorphism of aluminous rocks.
Help on IMA Status: IMA Status: Approved IMA 1976
Help on Locality: Locality: From the Bakhuis Mountains, Surinam. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Surinamite + Pronunciation Say SURINAMITE
Help on Synonym: Synonym: ICSD 31212
  PDF 38-433

Surinamite Image

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Comments: PPL thin-section image of blue surinamite (Sur) enclosing orthopyroxene (Opx) and sillimanite (Sil) with corderite (Crd), and quartz (Qtz). AmMin, v65:1474.
Location: South Harris Igneous Complex, N.W. Scotland. Scale: Picture Size 1.2 mm.
© American Mineralogist

Surinamite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8705:1:0.846
Help on Cell Dimensions: Cell Dimensions: a = 9.91, b = 11.384, c = 9.631, Z = 4; beta = 109.3° V = 1,025.46 Den(Calc)= 3.59
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.99(1), 2.435(1), 1.42(0.6),

Physical Properties of Surinamite

Help on Cleavage: Cleavage: {010} Good
Help on Color: Color: Blue, Blue green.
Help on Density: Density: 3.58
Help on Streak: Streak: white

Optical Properties of Surinamite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2068,KPDmeas= 0.2074,KC= 0.2058
Ncalc = 1.74
Help on Optical Data: Optical Data: Biaxial (-), a=1.738, b=1.743, g=1.746, bire=0.0080, 2V(Calc)=74, 2V(Meas)=67-68.

Calculated Properties of Surinamite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.53 gm/cc
note: Specific Gravity of Surinamite =3.59 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PESurinamite = 3.62 barns/electron
U=PESurinamite x rElectron Density= 12.81 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Surinamite is Not Radioactive

Surinamite Classification

Help on  Dana Class: Dana Class: 69.02.01b.02 (69)Inosilicate Chains with Side Branches or Loops
  (69.02)with P>2
  (69.02.01b)Aenigmatite and related species (Sapphirine subgroup)
69.02.01b.01 Sapphirine (Mg,Al)8(Al,Si)6O20 P1 1
69.02.01b.02 Surinamite (Mg,Fe)3Al4BeSi3O16 P 21/n 2/m
69.02.01b.03 Khmaralite! (Mg,Al,Fe)16(Al,Si,Be)12O40 P 21/c 2/m
Help on  Strunz Class: Strunz Class: 09.DH.55 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DH -Inosilicates with 4-periodic single chains, Si4O12
09.DH.55 Surinamite (Mg,Fe)3Al4BeSi3O16 P 21/n 2/m

Other Surinamite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Surinamite :
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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Dana No: 69.02.01b.02 Strunz No: 09.DH.55





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