Rorisite Mineral Data

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General Rorisite Information

Chemical Formula:

(Ca,Mg)FCl

Composition:

Molecular Weight = 90.59 gm

Calcium 33.18 % Ca 46.43 % CaO

Magnesium 6.71 % Mg 11.12 % MgO

Chlorine 39.14 % Cl 39.14 % Cl

- % Cl -8.83 % -O=Cl₂

Fluorine 20.97 % F 20.97 % F

- % F -8.83 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca_0.75Mg_0.25FCl

Environment:

Carbonized wood in burnt coal dumps.

IMA Status:

Approved IMA 1990

Locality:

Kopeysk, Chelyabinsk coal basin, Southern Ural Mountains, Russia. Link to MinDat.org Location Data.

Name Origin:

Named from the Latin for dew, in allusion to the transparent drops that cover the mineral in moist air.

Name Pronunciation:

Rorisite

Synonym:

ICSD 1130

IMA1989-015

PDF 24-185

Rorisite Image

Images:

Rorisite

Comments: Colorless to white tabular crystals of Rorisite. Rorisite is extremely hygroscopic and must be stored in closed vials. The picture was made through the vial.
Location: Kopeisk, Chelyabinsk Oblast', Urals Region, Russia. Scale: Picture size 2 mm.
© Thomas Witzke / Abraxas-Verlag

Rorisite Crystallography

Axial Ratios:

a:c = 1:1.75064

Cell Dimensions:

a = 3.89, c = 6.81, Z = 2; V = 103.05 Den(Calc)= 2.92

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/nmm

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

By Intensity(I/I_o): 2.557(1), 6.81(0.45), 2.267(0.35),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
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Liebich W , Nicollin D , Acta Crystallographica, Section B , 33 (1977) p.2790-2794, Refinement of the PbFCl types BaFI, BaFBr and CaFCl, Locality: synthetic

Physical Properties of Rorisite

Cleavage:

{???} Perfect

Color:

Colorless.

Density:

2.78

Diaphaneity:

Transparent

Hardness:

2 - Gypsum

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Rorisite

Optical Data:

Uniaxial (-), e=1.635, w=1.668, bire=0.0330.

Calculated Properties of Rorisite

Electron Density:

Bulk Density (Electron Density)=2.84 gm/cc
note: Specific Gravity of Rorisite =2.92 gm/cc.

Fermion Index:

Fermion Index = 0.0071556866
Boson Index = 0.9928443134

Photoelectric:

PE_Rorisite= 6.98 barns/electron
U=PE_Rorisite x rElectron Density= 19.80 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Rorisite is Not Radioactive

Rorisite Classification

Dana Class:

09.02.11.02 (09)Anhydrous and Hydrated Halides

(09.02)where A (X)2

(09.02.11)Matlockite Group

09.02.11.01 Matlockite PbFCl P 4/nmm 4/m 2/m 2/m

09.02.11.02 Rorisite (Ca,Mg)FCl P 4/nmm 4/m 2/m 2/m

09.02.11.03 Zhangpeishanite! BaFCl P 4/mmm 4mm

Strunz Class:

03.DC.25 03 - HALIDES

03.D - Oxyhalides, Hydroxyhalides and Related Double Halides

03.DC -With Pb (As,Sb,Bi), without Cu

03.DC.25 Bismoclite BiOCl P 4/nmm 4/m 2/m 2/m

03.DC.25 Daubreeite BiO(OH,Cl) P 4/nmm 4/m 2/m 2/m

03.DC.25 Matlockite PbFCl P 4/nmm 4/m 2/m 2/m

03.DC.25 Rorisite (Ca,Mg)FCl P 4/nmm 4/m 2/m 2/m

03.DC.25 Zavaritskite BiOF P 4/nmm 4/m 2/m 2/m

03.DC.25 Zhangpeishanite! BaFCl P 4/mmm 4mm

Other Rorisite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Am.Min.,Vol.76,p1731,1991) OPTIC PROP.(Am.Min.,Vol.76,p1731,1991)

See Also:

Links to other databases for Rorisite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Ask about Rorisite here :
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Mindat.org's Discussion Groups
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Rockhounds Discussion Group on Yahoo Groups
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Print or Cut-and-Paste your Rorisite Specimen Label here :

Rorisite

(Ca,Mg)FCl
Dana No: 09.02.11.02 Strunz No: 03.DC.25
Locality:

Notes: