General Shirokshinite Information![]() K(NaMg2)Si4O10F2 |
![]() Molecular Weight = 421.03 gm |
|
Potassium 9.29 % K 11.19 % K2O |
|
Sodium 5.46 % Na 7.36 % Na2O |
|
Magnesium 11.55 % Mg 19.15 % MgO |
|
Silicon 26.68 % Si 57.08 % SiO2 |
|
Oxygen 38.00 % O |
|
Fluorine 9.02 % F 9.02 % F |
|
- %
F -3.80 % -O=F2 |
|
______ ______ |
|
100.00 % 100.00 % = TOTAL OXIDE |
![]() KNaMg2Si4O10F2 |
![]() Occurs on microcline and kupletskite in cavities within a hyperalkaline pegmatite. (mica group; structure) |
![]() Approved IMA 2003 (Dana # Added) |
![]() Khibiny massif, Kola Peninsula, Russia. Link to MinDat.org Location Data. |
![]() Named for Nikolay V. Shirokshin (1809-), Russian geologist who in 1835 published the first geological data for the Khibiny massif. |
![]() IMA2001-063 |
| | Shirokshinite Image
|
![]()
|
Shirokshinite Crystallography![]() a:b:c =0.5808:1:1.122 |
![]() a = 5.269, b = 9.071, c = 10.178, Z = 2; beta = 100.03° V = 479.02 Den(Calc)= 2.92 |
![]() Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m |
![]() By Intensity(I/Io): 1.522(1)(206,135,331,062.41(1)(201,132), 3.36(0.9)(022,003),
1.665(0.8)(204,135), 10(0.7)(001), 1359(0.6)(207,136,046), 2.14(0.6)(202,133) |
|
![]()
Mouse
|
| Physical Properties of Shirokshinite![]() {001} Perfect |
![]() Colorless, Pale gray. |
![]() Transparent to Translucent |
![]() Flexible - Flexible fragments. |
![]() Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
![]() Pseudo Hexagonal - Crystals show a hexagonal outline. |
![]() Skeletal - Crystals form crude outlines with missing faces. |
![]() 2.5 - Finger Nail |
![]() Vitreous - Pearly |
![]() white |
| Optical Properties of Shirokshinite![]() CI calc= 0.055 (Good) - where the CI = (1-KPDcalc/KC) |
KPDcalc= 0.1863,KC= 0.1972 Ncalc = 1.58 ![]() Biaxial (-), a=1.526, b=1.553, g=1.553, bire=0.0270 |
| Calculated Properties of Shirokshinite![]() Bulk Density (Electron Density)=2.89 gm/cc |
note: Specific Gravity of Shirokshinite =2.92 gm/cc. ![]() Fermion Index = 0.02 |
Boson Index = 0.98 ![]() PEShirokshinite = 2.34 barns/electron |
U=PEShirokshinite x relectron= 6.76 barns/cc. ![]() |
GRapi = 132.40 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Shirokshinite | Shirokshinite Classification![]() 71.02.02a.12 (71)Phyllosilicate Sheets of Six-Membered Rings |
|
(71.02)with 2:1 Layers |
|
(71.02.02a)Mica Group (Muscovite subgroup) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
![]() 09.EC.20 09 - SILICATES (Germanates) |
|
09.E - Phyllosilicates |
|
09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Other Shirokshinite Information![]() NAME( AmMin, v 88, p 251) PHYS. PROP.(AmMin, v 88, p 251) OPTIC PROP.(AmMin, v 88, p 251) |
![]() Links to other databases for Shirokshinite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - GeoScienceWorld 4 - Google Images 5 - Google Scholar 6 - MinDAT 7 - Mineralienatlas (Deutsch) 8 - Online Mineral Museum 9 - QUT Mineral Atlas 10 - Ruff.Info Search for Shirokshinite using: Visit our Advertisers for Shirokshinite : A Bijoux Google Search for ShirokshiniteAdam's Minerals Google Search for Shirokshinite Cape Minerals Google Search for Shirokshinite Dakota Matrix Minerals Google Search for Shirokshinite Excalibur Mineral Corp. Google Search for Shirokshinite Exceptional Minerals Google Search for Shirokshinite John Betts Fine Minerals Search for Shirokshinite McDougall Minerals Google Search for Shirokshinite Mineral News Website Link Rock and Mineral Shows Google Search for Shirokshinite Weinrich Minerals, Inc. Google Search for Shirokshinite Ask about Shirokshinite here : Print or Cut-and-Paste your Shirokshinite Specimen Label here :
| |
|
| |