Rustumite Mineral Data

Rustumite Mineral Data +

General Rustumite Information

Chemical Formula:

Ca10(Si2O7)2(SiO4)Cl2(OH)2

Composition:

Molecular Weight = 934.12 gm

Calcium 42.90 % Ca 60.03 % CaO

Silicon 15.03 % Si 32.16 % SiO₂

Hydrogen 0.22 % H 1.93 % H₂O

Chlorine 7.59 % Cl 7.59 % Cl

- % Cl -1.71 % -O=Cl₂

Oxygen 34.26 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₁₀(Si₂O₇)₂(SiO₄)Cl₂(OH)₂

IMA Status:

Approved IMA 1965

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 20160

PDF 18-305

Rustumite Image

Images:

Rustumite Dellaite

Comments: White grains of dellaite, intermixed with rustumite.
Location: Queretaro, Zacatecas, Mexico. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Rustumite Crystallography

Axial Ratios:

a:b:c =0.4107:1:0.8361

Cell Dimensions:

a = 7.62, b = 18.55, c = 15.51, Z = 4; beta = 104.33° V = 2,124.14 Den(Calc)= 2.92

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.881(1), 3.028(1), 3.189(0.58),

Physical Properties of Rustumite

Cleavage:

[100] Indistinct

Color:

Colorless.

Density:

2.835

Diaphaniety:

Transparent

Streak:

white

Optical Properties of Rustumite

Optical Data:

NCalc= 1.65 - from Gladstone-Dale relationship (KC = 0.2235) where Ncalc=Dcalc*KC+1
NCalc= 1.63 - from Gladstone-Dale relationship (KC = 0.2235) where Ncalc=Dmeas*KC+1

Calculated Properties of Rustumite

Electron Density:

r_electron=2.91 gm/cc
note: r_Rustumite=2.92 gm/cc.

Fermion Index

Fermion Index = 0.00776
Boson Index = 0.99224

Photoelectric:

PE_Rustumite= 6.33 barns/electron
U=PE_Rustumite x r_electron= 18.43 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Rustumite is Not Radioactive

Rustumite Classification

Dana Class:

58.2.5.1 (58)Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups

(58.2)with cations in [6] and higher coordination; single and double groups (n=1,2)

(58.2.5)Dana Group

58.2.5.1 Rustumite Ca10(Si2O7)2(SiO4)Cl2(OH)2 C 2/c 2/m

Strunz Class:

VIII/C.22-20 VIII - Silicates

VIII/C - Sorosilicates, mixed structure with [SiO4]2- "inseln" and [Si2O7]6- groups

VIII/C.22 - Dellaite - Rustumite series

VIII/C.22-10 Dellaite Ca6Si3O11(OH)2 P1 1

VIII/C.22-20 Rustumite Ca10(Si2O7)2(SiO4)Cl2(OH)2 C 2/c 2/m

Other Rustumite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)

Search for Rustumite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Rustumite :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Rustumite Mineral Data :

Ask about Rustumite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Rustumite Specimen Label here :

Rustumite

Ca10(Si2O7)2(SiO4)Cl2(OH)2
Dana No: 58.2.5.1 Strunz No: VIII/C.22-20
Locality:

Notes: