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Spencerite Mineral Data

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General Spencerite Information

Help on Chemical  Formula: Chemical Formula: Zn4(PO4)2(OH)2•3(H2O)
Help on Composition: Composition: Molecular Weight = 539.56 gm
   Zinc        48.48 %  Zn   60.34 % ZnO
   Phosphorus  11.48 %  P    26.31 % P2O5
   Hydrogen     1.49 %  H    13.36 % H2O
   Oxygen      38.55 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Zn4(PO4)2(OH)2•3(H2O)
Help on Environment: Environment: Secondary mineral in some zinc-bearing hydrothermal deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1916
Help on Locality: Locality: Hudson Bay mine, about eight km southeast of Salmo, near Nelson, Kootenay district, British Columbia, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Leonard James Spencer (1870-1959), British mineralogist, formerly Keeper of Minerals, British Museum (Natural History), London, England.
Help on Name Pronunciation: Name Pronunciation: Spencerite + Pronunciation Say SPENCERITE
Help on Synonym: Synonym: ICSD 9349
  PDF 35-631

Spencerite Image

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Comments: Pale green pearly translucent spencerite, with divergent structure.
Location: Salmo, Nelson Mining District, British Columbia, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Spencerite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.9774:1:2.1204
Help on Cell Dimensions: Cell Dimensions: a = 10.441, b = 5.28, c = 11.196, Z = 2; beta = 116.833° V = 550.76 Den(Calc)= 3.25
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.4(1), 3.501(0.55), 2.332(0.3),

Physical Properties of Spencerite

Help on Cleavage: Cleavage: {???} Perfect, {???} Imperfect
Help on Color: Color: White.
Help on Density: Density: 3.12
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 3 - Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Pearly
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white

Optical Properties of Spencerite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.015 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.026 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.184,KPDmeas= 0.1917,KC= 0.1889
Ncalc = 1.59 - 1.61
Help on Optical Data: Optical Data: Biaxial (-), a=1.586, b=1.602, g=1.606, bire=0.0200

Calculated Properties of Spencerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.03 gm/cc
note: Specific Gravity of Spencerite =3.12 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PESpencerite = 24.46 barns/electron
U=PESpencerite x rElectron Density= 74.12 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Spencerite is Not Radioactive

Spencerite Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.06)where (AB)2 (XO4) Zq � x(H2O)
  (42.06.04)Strashimirite Group Legrandite Zn2(AsO4)(OH)•(H2O) P 21/c 2/m Spencerite Zn4(PO4)2(OH)2•3(H2O) P 2/c 2/m
Help on  Strunz Class: Strunz Class: 08.DA.40 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DA -With small (and occasionally larger) cations
08.DA.40 Spencerite Zn4(PO4)2(OH)2•3(H2O) P 2/c 2/m

Other Spencerite Information

Help on References: References: NAME( AntBidBlaNic4) 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 Spencerite :
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.DA.40





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