![]() |
Charoite Mineral Data |
General Charoite Information |
|||
![]() |
K5Ca8(Si6O15)2(Si2O7)Si4O9(OH)•3(H2O) | ||
![]() |
Molecular Weight = 1,828.68 gm | ||
Potassium 10.69 % K 12.88 % K2O | |||
Calcium 17.53 % Ca 24.53 % CaO | |||
Silicon 27.65 % Si 59.14 % SiO2 | |||
Hydrogen 0.39 % H 3.45 % H2O | |||
Oxygen 43.75 % O | |||
______ ______ | |||
100.00 % 100.00 % = TOTAL OXIDE | |||
![]() |
K5Ca8Si18O46(OH)•3(H2O) | ||
![]() |
Occurs within a syenite massif, in metasomatic rocks, formed between 200-250 deg. C and enriched with K at the contact of the massif with limestone. | ||
![]() |
Approved IMA 1978 | ||
![]() |
Murun massif, Chara River area, Aldan Shield, SW Yakutia (Sakha Republic). Link to MinDat.org Location Data. | ||
![]() |
Named for the impression that it gives: "chary" in Russian means "charms" or "magic" and not for the Chara River, which is 70 km away from the locality. | ||
Charoite Image | |||
![]() |
|
||
![]() |
|
||
![]() |
|
||
![]() |
|
||
![]() |
|
||
Charoite Crystallography |
|||
![]() |
a:b:c =0.6105:1:0.2241 | ||
![]() |
a = 19.61, b = 32.12, c = 7.2, Z = 4; beta = 93.76° V = 4,525.33 Den(Calc)= 2.68 | ||
![]() |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P*/4 ((pseudo Ortho) | ||
![]() |
By Intensity(I/Io): 3.348(1), 3.134(0.85), 12.45(0.7), | ||
Physical Properties of Charoite |
|||
![]() |
{???} Good, {???} Good, {???} Good | ||
![]() |
Violet, Lilac, Light brown. | ||
![]() |
2.54 - 2.58, Average = 2.56 | ||
![]() |
Translucent | ||
![]() |
Massive - Fibrous - Distinctly fibrous fine-grained forms. | ||
![]() |
5-6 - Between Apatite and Orthoclase | ||
![]() |
Weakly Fluorescent. Orange cathodeluminescent, Short UV=pale blue, Long UV=pale blue. | ||
![]() |
Vitreous - Pearly | ||
![]() |
white | ||
Optical Properties of Charoite |
|||
![]() |
CI meas= -0.023 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.023 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2067,KPDmeas= 0.2164,KC= 0.2115 Ncalc = 1.54 - 1.57 |
||
![]() |
Biaxial (+), a=1.55, b=1.553, g=1.559, bire=0.0090, 2V(Calc)=72, 2V(Meas)=28-30. | ||
![]() |
rose. | ||
![]() |
colorless. | ||
![]() |
colorless. | ||
Calculated Properties of Charoite |
|||
![]() |
Bulk Density (Electron Density)=2.68 gm/cc note: Specific Gravity of Charoite =2.68 gm/cc. |
||
![]() |
Fermion Index = 0.01 Boson Index = 0.99 |
||
![]() |
PECharoite = 4.27 barns/electron U=PECharoite x relectron= 11.44 barns/cc. |
||
![]() |
GRapi = 154.18 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Charoite |
||
Charoite Classification |
|||
![]() |
70.01.02.03 (70)Inosilicate Column or Tube Structures | ||
(70.01)with columnar silicate units | |||
(70.01.02)Double crankshaft chains | |||
![]() |
09.DG.09.2 09 - SILICATES (Germanates) | ||
09.D - Inosilicates* Structural terminology according to Liebau (1985) | |||
09.DG -Inosilicates with 3-periodic single and multiple chains | |||
Other Charoite Information |
|||
![]() |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) | ||
![]() |
Links to other databases for Charoite : 1 - Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Athena 4 - CalTech Mineral Spectroscopy 5 - EUROmin Project 6 - Ecole des Mines de Paris 7 - GeoScienceWorld 8 - Google Images 9 - Google Scholar 10 - Handbook of Mineralogy (MinSocAm) 11 - Handbook of Mineralogy (UofA) 12 - HyperPhysics 13 - MinDAT 14 - Mineralienatlas (Deutsch) 15 - Online Mineral Museum 16 - QUT Mineral Atlas 17 - Ruff.Info 18 - Tradeshop.com - The Rainbow of Gems Search for Charoite using: Visit our Advertisers for Charoite : Ask about Charoite here : Print or Cut-and-Paste your Charoite Specimen Label here :
|
||
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.