Foshagite Mineral Data + 
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- 65.2.2.1 Foshagite Ca4Si3O9(OH)2 P 21/m 2/m
- VIII/F.18-10 Wollastonite-1A CaSiO3 P1 1
- VIII/F.18-10* Wollastonite-2M* CaSiO3 P 21 2
- VIII/F.18-10** Wollastonite-3A-4A-5A-7A* CaSiO3 P1 1
- VIII/F.18-30 Ferrobustamite Ca(Fe,Ca,Mn)Si2O6 P1 1
- VIII/F.18-40 Bustamite (Mn,Ca)3Si3O9 P1 1
- VIII/F.18-50 Cascandite Ca(Sc,Fe)Si3O8(OH) C1 1
- VIII/F.18-60 Pectolite NaCa2Si3O8(OH) P1 1
- VIII/F.18-70 Denisovite (K,Na)Ca2Si3O8(F,OH) Mono
- VIII/F.18-80 Serandite Na(Mn,Ca)2Si3O8(OH) P1 1
- VIII/F.18-90 Foshagite Ca4Si3O9(OH)2 P 21/m 2/m
- VIII/F.18-100 Hillebrandite Ca6Si3O9(OH)6 C mc21 mm2
General Foshagite Information |
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 Chemical Formula: |
Ca4Si3O9(OH)2 | ||
| Composition: |
Molecular Weight = 422.58 gm | ||
| Calcium 37.94 % Ca 53.08 % CaO | |||
| Silicon 19.94 % Si 42.66 % SiO2 | |||
| Hydrogen 0.48 % H 4.26 % H2O | |||
| Oxygen 41.65 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Ca4Si3O9(OH)2 | ||
| Environment: |
Metamorphosed limestone. | ||
| IMA Status: |
Valid Species (Pre-IMA) 1925 | ||
| Locality: |
Crestmore quarry, 5 miles NW of Riverside, Riverside Co. California. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for William Fredrick Foshag (1894-1956), mineralogist and former curator at U. S. National Museum. | ||
| Synonym: |
ICSD 25818 | ||
| PDF 29-377 | |||
Foshagite Image | |||
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Images:
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Foshagite Crystallography |
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| Axial Ratios: |
a:b:c =2.8423:1:1.9213 | ||
| Cell Dimensions: |
a = 10.406, b = 3.661, c = 7.034, Z = 1; beta = 107.07° V = 256.16 Den(Calc)= 2.74 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/m | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.953(1), 3.36(0.25), 4.96(0.25), | ||
Physical Properties of Foshagite |
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| Cleavage: |
[001] Distinct | ||
| Color: |
Snow white. | ||
| Density: |
2.36 | ||
| Diaphaniety: |
Translucent | ||
| Habit: |
Acicular - Occurs as needle-like crystals. | ||
| Habit: |
Fibrous - Crystals made up of fibers. | ||
| Luminescence: |
Non-fluorescent. | ||
| Luster: |
Silky | ||
| Magnetism: |
Nonmagnetic | ||
| Streak: |
white | ||
Optical Properties of Foshagite |
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| Gladstone-Dale: |
CI meas= -0.175 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.012 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2173,KPDmeas= 0.2523,KC= 0.2147 |
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| Optical Data: |
Biaxial (+), a=1.594, b=1.594, g=1.598, bire=0.0040 | ||
Calculated Properties of Foshagite |
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| Electron Density: |
relectron=2.75 gm/cc |
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| Fermion Index |
Fermion Index = 0.01002 Boson Index = 0.98998 |
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| Photoelectric: |
PEFoshagite = 5.40 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Foshagite is Not Radioactive |
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Foshagite Classification |
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| Dana Class: |
65.2.2.1 (65)Inosilicate Single-Width Unbranched Chains, W=1 | ||
| (65.2)with chains P=3 | |||
| (65.2.2)Dana Group | |||
| Strunz Class: |
VIII/F.18-90 VIII - Silicates | ||
| VIII/F - Inosilicates (chain and band) Triplet chains [Si3O9]6- | |||
| VIII/F.18 - Wollastonite-2M - Foshagite series | |||
Other Foshagite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32) | ||
| See Also: |
Links to other databases for Foshagite : 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 - WWW-MINCRYST 15 -École des Mines de Paris Search for Foshagite using: Visit our Advertisers for Foshagite : Translate Foshagite Mineral Data : Ask about Foshagite here : Print or Cut-and-Paste your Foshagite Specimen Label here :
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