Movatterモバイル変換

[0]ホーム

Creedite Mineral Data

Home

General Creedite Information

Chemical Formula:

Ca3Al2(SO4)(F,OH)10•2(H2O)

Composition:

Molecular Weight = 491.30 gm

Empirical Formula:

Ca₃Al₂(SO₄)F_7.5(OH)_2.5•2(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1916

Locality:

Wagon Wheel Gap, Creed Quadrangle, Colorado, USA. Link to MinDat.org Location Data.

Name Origin:

Named after its locality.

Name Pronunciation:

Creedite

Synonym:

ICSD 31248

PDF Aug-72

Creedite Image

Images:

Creedite

Images:

Creedite Fluorite

Images:

Creedite Smithsonite

Creedite Crystallography

Axial Ratios:

a:b:c =1.5046:1:1.1655

Cell Dimensions:

a = 12.91, b = 8.58, c = 10, Z = 4; beta = 94.4° V = 1,104.41 Den(Calc)= 2.95

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):3.48(1), 6.9(0.9), 7.3(0.9),

Forms:

Keyboard

Help on Above

Forms:

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Physical Properties of Creedite

Cleavage:

{100} Perfect

Color:

Colorless, Violet, White.

Density:

2.71

Diaphaneity:

Transparent to translucent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

3.5 - Copper Penny

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Greasy

Streak:

white

Optical Properties of Creedite

Optical Data:

Biaxial (-), a=1.461, b=1.478, g=1.485, bire=0.0240

Calculated Properties of Creedite

Electron Density:

Bulk Density (Electron Density)=2.93 gm/cc
note: Specific Gravity of Creedite =2.95 gm/cc.

Fermion Index:

Fermion Index = 0.0009547598
Boson Index = 0.9990452402

Photoelectric:

PE_Creedite= 3.91 barns/electron
U=PE_Creedite x Electron Density= 11.45 barns/cc.

Radioactivity:

GRapi = 0(Gamma Ray American Petroleum Institute Units)
Creedite isNot Radioactive

Creedite Classification

Dana Class:

12.01.04.01(12)Compound Halides

(12.01)with miscellaneous anions

(12.01.04)Dana Group

Strunz Class:

03.CG.1503 - HALIDES

03.C - Complex Halides

03.CG -Aluminofluorides with CO3, SO4, PO4

Other Creedite Information

References:

NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

Search for Creedite using:

[AOL][Bing][Dog Pile][GeoScienceWorld][HotBot][Ixquick][Lycos][MAMMA][Scirus][Teoma][WebCrawler][Wikipedia][YAHOO]

Visit our Advertisers for Creedite :

Ask about Creedite 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 inEspañol

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

[8]ページ先頭