[Content and History] [Recent Issues] [Back Issues] [Subscriptions] [Contacts] See Also: [Diamond Crystals] [Excalibur Minerals] [Hudson Institute] [Minerals on CDROM] Mineral News was founded some twenty years ago and has developed a following of avid mineral collectors seeking timely information about new finds and other items of interest to the collector community. Articles are solicited from collector and scientific authors. General Scolecite InformationCaAl2Si3O10•3(H2O) |
Molecular Weight = 392.34 gm |
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Calcium 10.22 % Ca 14.29 % CaO |
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Aluminum 13.75 % Al 25.99 % Al2O3 |
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Silicon 21.48 % Si 45.94 % SiO2 |
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Hydrogen 1.54 % H 13.78 % H2O |
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Oxygen 53.01 % O |
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100.00 % 100.00 % = TOTAL OXIDE |
CaAl2Si3O10•3(H2O) |
Low temperature alteration of basalts and related rocks. |
Valid Species (Pre-IMA) 1813 |
Kaiserstuhl in Baden. Link to MinDat.org Location Data. |
From the Greek, skolec = 'worm' in reference to the mineral's reaction to the blowpipe flame. |
Scolecite + Pronunciation |
ICSD 30967 |
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PDF 41-1355 |
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Scolecite Crystallographya:b:c =0.3438:1:0.5151 |
a = 6.516, b = 18.948, c = 9.761, Z = 4; beta = 108.98° V = 1,139.62 Den(Calc)= 2.29 |
Monoclinic - DomaticH-M Symbol (m) Space Group: Cc |
By Intensity(I/Io): 2.882(1), 5.85(1), 6.59(0.9), |
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Mouse
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| Physical Properties of Scolecite{110} Perfect |
Brownish, Colorless, White. |
2.16 - 2.4, Average = 2.28 |
Transparent to subtranslucent |
Brittle - Uneven - Very brittle fracture producing uneven fragments. |
Massive - Fibrous - Distinctly fibrous fine-grained forms. |
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) |
5-5.5 - Apatite-Knife Blade |
Non-fluorescent. |
Vitreous - Silky |
white |
| Optical Properties of ScoleciteCI meas= 0 (Superior) - where the CI = (1-KPDmeas/KC) |
CI calc= 0.005 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2252,KPDmeas= 0.2262,KC= 0.2262 Ncalc = 1.49 - 1.54 Biaxial (-), a=1.507-1.513, b=1.516-1.52, g=1.517-1.521, bire=0.0080-0.0100, 2V(Calc)=36-40, 2V(Meas)=36-56. Dispersion relatively strong. |
colorless. |
colorless. |
colorless. |
| Calculated Properties of ScoleciteBulk Density (Electron Density)=2.30 gm/cc |
note: Specific Gravity of Scolecite =2.28 gm/cc. Fermion Index = 0.01 |
Boson Index = 0.99 PEScolecite = 2.50 barns/electron |
U=PEScolecite x rElectron Density= 5.75 barns/cc. GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Scolecite is Not Radioactive | Scolecite Classification77.01.05.05 (77)Tectosilicate Zeolite group |
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(77.01)true zeolites |
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(77.01.05)Natrolite and related species |
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09.GA.05 09 - SILICATES (Germanates) |
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09.G - Tektosilicates with Zeolitic H2O |
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09.GA -Zeolites with T5O10 Units – The Fibrous Zeolites |
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| Other Scolecite InformationNAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
Links to other databases for Scolecite : |
1 - Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Athena 4 - EUROmin Project 5 - Ecole des Mines de Paris 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - Handbook of Mineralogy (UofA) 10 - HyperPhysics 11 - MinDAT 12 - MinMax(Deutsch) 13 - MinMax(English) 14 - Mineralienatlas (Deutsch) 15 - Philatelic Mineralogy 16 - QUT Mineral Atlas 17 - Ruff.Info 18 - WWW-MINCRYST 19 - theimage Search for Scolecite using: Visit our Advertisers for Scolecite : AA Mineral SpecimensB & L Fine Minerals Crystalarium.com Dan Weinrich Fine Minerals Dan Weinrich Auctions Dakota Matrix Desert Winds Gems and Minerals Excalibur Minerals Exceptional Minerals Fabre Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club Wrights Rock Shop Translate Scolecite Mineral Data : Ask about Scolecite here : Print or Cut-and-Paste your Scolecite Specimen Label here :
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