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Samuelsonite Mineral Data

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General Samuelsonite Information

Help on Chemical  Formula: Chemical Formula: (Ca,Ba)Ca8(Fe++,Mn)4Al2(PO4)10(OH)2
Help on Composition: Composition: Molecular Weight = 1,653.71 gm
   Barium       1.66 %  Ba    1.85 % BaO
   Sodium       0.14 %  Na    0.19 % Na2O
   Strontium    0.53 %  Sr    0.63 % SrO
   Calcium     19.63 %  Ca   27.47 % CaO
   Manganese    5.32 %  Mn    6.86 % MnO
   Aluminum     2.45 %  Al    4.62 % Al2O3
   Iron         8.44 %  Fe   10.86 % FeO
   Phosphorus  18.36 %  P    42.06 % P2O5
   Hydrogen     0.33 %  H     2.94 % H2O
   Oxygen      43.15 %  O
              ______        ______ 
              100.00 %       97.48 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba0.2Sr0.1Ca8.1Fe2+2.5Mn2+1.6Na0.1Al1.5(PO4)9.8(OH)5.4
Help on Environment: Environment: Secondary mineral in a complex zoned granite pegmatite.
Help on IMA Status: IMA Status: Approved IMA 1975
Help on Locality: Locality: Palermo #1 mine, near North Groton, Grafton County, New Hampshire, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Peter B. Samuelson (1941-), Rumney New Hampshire, USA.
Help on Name Pronunciation: Name Pronunciation: Samuelsonite + Pronunciation Say SAMUELSONITE
Help on Synonym: Synonym: ICSD 100034
  PDF 29-154

Samuelsonite Image

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Comments: Transparent crystal of samuelsonite.
Location: Palermo #1 mine, Groton, Grafton Co., New Hampshire, USA. Scale: Picture size 2.2 mm.
© Thomas Witzke / Abraxas-Verlag

Samuelsonite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.7178:1:2.0573
Help on Cell Dimensions: Cell Dimensions: a = 18.495, b = 6.805, c = 14, Z = 2; beta = 112.75° V = 1,624.94 Den(Calc)= 3.38
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.058(1), 2.657(0.7), 3.032(0.6),

Physical Properties of Samuelsonite

Help on Cleavage: Cleavage: {001} Good
Help on Color: Color: Colorless.
Help on Density: Density: 3.353
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Subadamantine
Help on Streak: Streak: white

Optical Properties of Samuelsonite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.016 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.008 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1933,KPDmeas= 0.1949,KC= 0.1918
Ncalc = 1.64 - 1.65
Help on Optical Data: Optical Data: Biaxial (+), a=1.645-1.648, b=1.65-1.655, g=1.655-1.667, bire=0.0100-0.0190, 2V(Calc)=76-88, 2V(Meas)=70-85. Dispersion r < v weak.

Calculated Properties of Samuelsonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.32 gm/cc
note: Specific Gravity of Samuelsonite =3.38 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0055933091
Boson Index = 0.9944066909
Help on Photoelectric: Photoelectric: PESamuelsonite = 14.60 barns/electron
U=PESamuelsonite x rElectron Density= 48.47 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Samuelsonite is Not Radioactive

Samuelsonite Classification

Help on  Dana Class: Dana Class: (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.10)where (A++ B++)3 (XO4)2 Zq
  (41.10.08)Dana Group Samuelsonite (Ca,Ba)Ca8(Fe,Mn)4Al2(PO4)10(OH)2 C 2/m 2/m
Help on  Strunz Class: Strunz Class: 08.BF.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BF -With medium-sized and large cations, (OH, etc.):RO4 < 0.5:1
08.BF.10 Samuelsonite (Ca,Ba)Ca8(Fe,Mn)4Al2(PO4)10(OH)2 C 2/m 2/m

Other Samuelsonite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic4)
Help on See Also: See Also: Links to other databases for Samuelsonite :
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: Strunz No: 08.BF.10





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