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Rankinite Mineral Data + |
General Rankinite Information |
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| Ca3Si2O7 | |||
| Molecular Weight = 288.40 gm | |||
| Calcium 41.69 % Ca 58.33 % CaO | |||
| Silicon 19.48 % Si 41.67 % SiO2 | |||
| Oxygen 38.83 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Ca3Si2O7 | |||
| Valid Species (Pre-IMA) 1942 | |||
| Link to MinDat.org Location Data. | |||
| ICSD 2282 | |||
| PDF 22-539 | |||
Search for Rankinite Images | |||
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Rankinite Crystallography |
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| a:b:c =1.188:1:0.884 | |||
| a = 10.55, b = 8.88, c = 7.85, Z = 4; beta = 120.1° V = 636.25 Den(Calc)= 3.01 | |||
| Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a | |||
| By Intensity(I/Io): 2.72(1), 3.18(0.8), 4.48(0.7), | |||
Physical Properties of Rankinite |
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| None | |||
| Colorless, White. | |||
| 2.96 - 3, Average = 2.98 | |||
| Transparent | |||
| 5.5 - Knife Blade | |||
| Vitreous (Glassy) | |||
| white | |||
Optical Properties of Rankinite |
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| CI meas= -0.035 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= -0.024 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2142,KPDmeas= 0.2164,KC= 0.2092 |
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| Biaxial (+), a=1.64-1.641, b=1.644, g=1.65, bire=0.0090-0.0100, 2V(Calc)=72-80, 2V(Meas)=64. | |||
Calculated Properties of Rankinite |
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relectron=3.01 gm/cc |
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| Fermion Index = 0.00984 Boson Index = 0.99016 |
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PERankinite = 5.85 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Rankinite is Not Radioactive |
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Rankinite Classification |
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| 55.3.1.1 (55)Sorosilicate Si2O7 Groups, Generally with No Additional Anions | |||
| (55.3)with cations in [7] coordination | |||
| (55.3.1)Dana Group | |||
| VIII/C.03-10 VIII - Silicates | |||
| VIII/C - Sorosilicates, with [Si2O7]6-, without anions unfamiliar to tetraheders | |||
| VIII/C.03 - Rankinite - Cebollite series | |||
Other Rankinite Information |
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| PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65) | |||
| Links to other databases for Rankinite : 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 -École des Mines de Paris Search for Rankinite using: Visit our Advertisers for Rankinite : Translate Rankinite Mineral Data : Ask about Rankinite here : Print or Cut-and-Paste your Rankinite Specimen Label here :
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