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Serandite Mineral Data + |
General Serandite Information |
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| Na(Mn++,Ca)2Si3O8(OH) | |||
| Molecular Weight = 354.69 gm | |||
| Sodium 6.48 % Na 8.74 % Na2O | |||
| Calcium 5.65 % Ca 7.91 % CaO | |||
| Manganese 23.23 % Mn 30.00 % MnO | |||
| Silicon 23.75 % Si 50.82 % SiO2 | |||
| Hydrogen 0.28 % H 2.54 % H2O | |||
| Oxygen 40.60 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| NaMn2+1.5Ca0.5Si3O8(OH) | |||
| Alkaline rocks and syenite pegmatites. Forms a series with pectolite. | |||
| Valid Species (Pre-IMA) 1931 | |||
| Rouma, Los Islands, Guinea. Link to MinDat.org Location Data. | |||
| Named for J. M. Serand, West African mineral collector. | |||
| ICSD 12130 | |||
| PDF 25-723 | |||
Serandite Image | |||
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Serandite Crystallography |
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| a:b:c =1.1071:1:0.9779 | |||
| a = 7.638, b = 6.899, c = 6.747, Z = 2; alpha = 90.53°, beta = 94.12°, gamma = 102.75° V = 345.85 Den(Calc)= 3.41 | |||
| Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1 | |||
| By Intensity(I/Io): 2.983(1), 3.158(0.9), 2.838(0.65), | |||
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Physical Properties of Serandite |
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| [100] Perfect, [001] Perfect | |||
| Light brown, Light pink, Orange red. | |||
| 3 - 3.4, Average = 3.2 | |||
| Transparent to Translucent | |||
| Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). | |||
| 4.5-5.5 - Near Apatite | |||
| Vitreous - Pearly | |||
| white | |||
Optical Properties of Serandite |
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| CI meas= -0.04 (Good) - where the CI = (1-KPDmeas/KC) CI calc= 0.024 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2018,KPDmeas= 0.215,KC= 0.2066 |
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| Biaxial (+), a=1.674-1.68, b=1.677-1.682, g=1.705-1.71, bire=0.0250-0.0360, 2V(Calc)=34-36, 2V(Meas)=33. | |||
Calculated Properties of Serandite |
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relectron=3.34 gm/cc |
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| Fermion Index = 0.01136 Boson Index = 0.98864 |
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PESerandite = 7.60 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Serandite is Not Radioactive |
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Serandite Classification |
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| 65.2.1.5 (65)Inosilicate Single-Width Unbranched Chains, W=1 | |||
| (65.2)with chains P=3 | |||
| (65.2.1)Wollastonite group | |||
| VIII/F.18-80 VIII - Silicates | |||
| VIII/F - Inosilicates (chain and band) Triplet chains [Si3O9]6- | |||
| VIII/F.18 - Wollastonite-2M - Foshagite series | |||
Other Serandite Information |
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| NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8, Enc. of Minerals, 2nd ed.,1990) | |||
| Links to other databases for Serandite : 1 - Alkali-Nuts(Francais) 2 - Am. Min. Crystal Structure Database 3 - Amethyst Galleries' Mineral Gallery 4 - Athena 5 - EUROmin Project 6 - Ecole des Mines de Paris 7 - Google Images 8 - Google Scholar 9 - Handbook of Mineralogy (MinSocAm) 10 - Handbook of Mineralogy (UofA) 11 - HyperPhysics 12 - MinDAT 13 - MinMax(Deutsch) 14 - MinMax(English) 15 - Mineral and Gemstone Kingdom 16 - Mineralienatlas (Deutsch) 17 - QUT Mineral Atlas 18 - Ruff.Info 19 - WWW-MINCRYST Search for Serandite using: Visit our Advertisers for Serandite : AA Mineral SpecimensB & L Fine Minerals Dan Weinrich Fine Minerals Dan Weinrich Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals The GeoZone Wrights Rock Shop Translate Serandite Mineral Data : Ask about Serandite here : Print or Cut-and-Paste your Serandite Specimen Label here :
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