Mineralogy Database

Malayaite Mineral Data

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General Malayaite Information

Help on Chemical  Formula: Chemical Formula: CaSnSiO5 = CaSnOSiO4
Help on Composition: Composition: Molecular Weight = 266.87 gm
   Calcium  15.02 %  Ca   21.01 % CaO
   Silicon  10.52 %  Si   22.51 % SiO2
   Tin      44.48 %  Sn   50.48 % SnO
   Oxygen   29.98 %  O
           ______        ______ 
           100.00 %       94.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaSnSiO5
Help on Environment: Environment: Hydrothermal alteration of cassiterite-quartz assemblege and Sn-bearing skarns. Strucurally related to titanite.
Help on IMA Status: IMA Status: Approved IMA 1965
Help on Locality: Locality: Sunsei Lah, Chenderiang, Perak, Malaysia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality
Help on Name Pronunciation: Name Pronunciation: Malayaite + Pronunciation Say MALAYAITE
Help on Synonym: Synonym: ICSD 81635
  PDF 25-176

Malayaite Image

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Comments: Pale bluish colored malayaite under visible and SWUV light.
Location: Red-a-Ven Mine, Meldon, Okehampton, Devon, Great Britain. Scale: 3.7 x 2 cm.
© John Veevaert

Malayaite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8027:1:0.7485
Help on Cell Dimensions: Cell Dimensions: a = 7.149, b = 8.906, c = 6.667, Z = 4; beta = 113.3° V = 389.86 Den(Calc)= 4.55
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: A2/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.28(1), 2.66(0.8), 5.03(0.8),

Physical Properties of Malayaite

Help on Color: Color: Colorless, Greenish gray, White, Light yellow, Orange.
Help on Density: Density: 4.3 - 4.55, Average = 4.42
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Wedge shaped - Crystals shaped like a wedge.
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luminescence: Luminescence: Fluorescent, Short UV=bright yellowish green.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Malayaite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.095 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.065 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1721,KPDmeas= 0.177,KC= 0.1616
Ncalc = 1.69 - 1.74
Help on Optical Data: Optical Data: Biaxial (-), a=1.764-1.767, b=1.783-1.785, g=1.798-1.802, bire=0.0340-0.0350
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): pale yellow.

Calculated Properties of Malayaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.23 gm/cc
note: Specific Gravity of Malayaite =4.55 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.07
Boson Index = 0.93
Help on Photoelectric: Photoelectric: PEMalayaite = 134.23 barns/electron
U=PEMalayaite x rElectron Density= 567.55 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Malayaite is Not Radioactive

Malayaite Classification

Help on  Dana Class: Dana Class: (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.04)with cations in [6] and/or > [6] coordination
  (52.04.03)Titanite group Titanite CaTiSiO5 P 21/a 2/m Malayaite CaSnSiO5=CaSnOSiO4 A2/a 2/m Vanadomalayaite CaVOSiO4 C 2/c 2/m
Help on  Strunz Class: Strunz Class: 09.AG.15 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AG -Nesosilicates with additional anions; cations in > [6] � [6] coordination
09.AG.15 Malayaite CaSnSiO5=CaSnOSiO4 A2/a 2/m
09.AG.15 Vanadomalayaite CaVOSiO4 C 2/c 2/m
09.AG.15 Titanite CaTiSiO5 P 21/a 2/m

Other Malayaite Information

Help on References: References: PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Malayaite :
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
15 - University of Colorado - Mineral Structure Data

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Print or Cut-and-Paste your Malayaite Specimen Label here :


CaSnSiO5 = CaSnOSiO4
Dana No: Strunz No: 09.AG.15





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