Malayaite Mineral Data + 
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- 52.4.3.1 Titanite CaTiSiO5 P 21/a 2/m
- 52.4.3.2 Malayaite CaSnSiO5=CaSnOSiO4 A2/a 2/m
- 52.4.3.3 Vanadomalayaite CaVOSiO4 C 2/c 2/m
- VIII/B.12-10 Titanite CaTiSiO5 P 21/a 2/m
- VIII/B.12-15 Vanadomalayaite CaVOSiO4 C 2/c 2/m
- VIII/B.12-20 Malayaite CaSnSiO5=CaSnOSiO4 A2/a 2/m
- VIII/B.12-30 Trimounsite-(Y) (Y,REE)2Ti2SiO9 P 21/c 2/m
General Malayaite Information |
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 Chemical Formula: |
CaSnSiO5 = CaSnOSiO4 | ||
| 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 | |||
| Empirical Formula: |
CaSnSiO5 | ||
| Environment: |
Hydrothermal alteration of cassiterite-quartz assemblege and Sn-bearing skarns. Strucurally related to titanite. | ||
| IMA Status: |
Approved IMA 1965 | ||
| Locality: |
Sunsei Lah, Chenderiang, Perak, Malaysia. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for the locality | ||
| Synonym: |
ICSD 81635 | ||
| PDF 25-176 | |||
Malayaite Image | |||
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Images:
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Malayaite Crystallography |
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| Axial Ratios: |
a:b:c =0.8027:1:0.7485 | ||
| Cell Dimensions: |
a = 7.149, b = 8.906, c = 6.667, Z = 4; beta = 113.3° V = 389.86 Den(Calc)= 4.55 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: A2/a | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.28(1), 2.66(0.8), 5.03(0.8), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Malayaite |
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| Color: |
Colorless, Greenish gray, White, Light yellow, Orange. | ||
| Density: |
4.3 - 4.55, Average = 4.42 | ||
| Diaphaniety: |
Translucent | ||
| Habit: |
Massive - Uniformly indistinguishable crystals forming large masses. | ||
| Habit: |
Wedge shaped - Crystals shaped like a wedge. | ||
| Hardness: |
3.5-4 - Copper Penny-Fluorite | ||
| Luminescence: |
Fluorescent, Short UV=bright yellowish green. | ||
| Luster: |
Vitreous (Glassy) | ||
| Streak: |
white | ||
Optical Properties of Malayaite |
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| 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 |
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| Optical Data: |
Biaxial (-), a=1.764-1.767, b=1.783-1.785, g=1.798-1.802, bire=0.0340-0.0350 | ||
| Pleochroism (x): |
colorless. | ||
| Pleochroism (y): |
colorless. | ||
| Pleochroism (z): |
pale yellow. | ||
Calculated Properties of Malayaite |
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| Electron Density: |
relectron=4.23 gm/cc |
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| Fermion Index |
Fermion Index = 0.07919 Boson Index = 0.92081 |
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| Photoelectric: |
PEMalayaite = 134.23 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Malayaite is Not Radioactive |
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Malayaite Classification |
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| Dana Class: |
52.4.3.2 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O | ||
| (52.4)with cations in [6] and/or > [6] coordination | |||
| (52.4.3)Titanite group | |||
| Strunz Class: |
VIII/B.12-20 VIII - Silicates | ||
| VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, cationes with coordinationnumber between [8] and [12] | |||
| VIII/B.12 - Titanite series | |||
Other Malayaite Information |
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| References: |
PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) | ||
| See Also: |
Links to other databases for Malayaite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (MinSocAm) 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 -University of Colorado - Mineral Structure Data 15 - WWW-MINCRYST 16 -École des Mines de Paris Search for Malayaite using: Visit our Advertisers for Malayaite : Translate Malayaite Mineral Data : Ask about Malayaite here : Print or Cut-and-Paste your Malayaite Specimen Label here :
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