Rorisite
A valid IMA mineral species
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About Rorisite
Dew
Formula:
CaFCl
Colour:
Colorless
Lustre:
Vitreous
Hardness:
2
Specific Gravity:
2.78
Crystal System:
Tetragonal
Member of:
Name:
From Latin, "roris", for "dew", alluding to the transparent drops that form on the mineral in moist air, that look like dew.
Type Locality:
Unique Identifiers
Mindat ID:
3446
Long-form identifier:
mindat:1:1:3446:9
Similar Names
| Ruarsite | A valid IMA mineral species | (Ru,Os)AsS |
IMA Classification of Rorisite
Approved
IMA Formula:
CaClF
Approval year:
1989
First published:
1982
Classification of Rorisite
3.DC.25
3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
C : With Pb (As,Sb,Bi), without Cu
3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
C : With Pb (As,Sb,Bi), without Cu
9.2.11.2
9 : NORMAL HALIDES
2 : AX2
9 : NORMAL HALIDES
2 : AX2
8.4.11
8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
4 : Halides of the alkaline earths and Mg
8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
4 : Halides of the alkaline earths and Mg
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Rrs | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Rorisite
Vitreous
Transparency:
Transparent
Comment:
becoming turbid on exposure to moist air
Colour:
Colorless
Streak:
White
Hardness:
2 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
Perfect {110} and excellent {001}
Perfect {110} and excellent {001}
Fracture:
Conchoidal
Comment:
Thin leaves exhibit a bit of elasticity
Density:
2.78(1) g/cm3 (Measured) 2.94 g/cm3 (Calculated)
Optical Data of Rorisite
Type:
Uniaxial (-)
RI values:
nω = 1.668(2) nε = 1.635(2)
Max. Birefringence:
δ = 0.033
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized uniaxial interference figure - the conoscopic
(convergent-light, Bertrand-lens-in) view, for a grain cut with the optic axis
centred and vertical. The coloured rings are isochromatics, computed with the
same physics as the Michel-Lévy bar above; the dark cross is the isogyre.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
Chemistry of Rorisite
Mindat Formula:
CaFCl
Element Weights:
Elements listed:
Common Impurities:
Mg
Crystallography of Rorisite
Crystal System:
Tetragonal
Class (H-M):
4/mmm(4/m2/m2/m) - Ditetragonal Dipyramidal
Space Group:
P4/nmm
Setting:
P4/nmm
Cell Parameters:
a = 3.890(1) Å, c = 6.810(1) Å
Ratio:
a:c = 1 : 1.751
Unit Cell V:
103.05 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Flattened on {001}, with {111} and {110} and occasionally {100}.
Comment:
by analogy to matlockite
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0009601 | Rorisite | Liebich W, Nicollin D (1977) Refinement of the PbFCl types BaFI, BaFBr and CaFCl Acta Crystallographica B33 2790-2794 |  | 1977 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.557 Å | (100) |
| 6.81 Å | (45) |
| 2.267 Å | (35) |
| 2.138 Å | (32) |
| 1.560 Å | (32) |
| 3.396 Å | (30) |
| 1.363 Å | (25) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere | <0.6 |
| 50 : Coal and/or oil shale minerals | <0.36 |
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 54 : Coal and other mine fire minerals (see also #51 and #56) |
Type Occurrence of Rorisite
General Appearance of Type Material:
Tabular crystals up to 1 mm in diameter. Most crystals have "fused" surfaces without well-expressed flat surfaces.
Place of Conservation of Type Material:
1) Mining Institute, St. Petersburg, Russia, 2073.
2) Il’menskii Preserve Museum, Miass, Russia, 5880.
3) A. E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, r460/1.
2) Il’menskii Preserve Museum, Miass, Russia, 5880.
3) A. E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, r460/1.
Geological Setting of Type Material:
Burnt coal dump
Associated Minerals at Type Locality:
Synonyms of Rorisite
Other Language Names for Rorisite
Relationship of Rorisite to other Species
Member of:
Other Members of Matlockite Group:
| Bismoclite | BiOCl | Tet. 4/mmm(4/m2/m2/m) : P4/nmm |
| Daubréeite | BiO(OH) | Tet. 4/mmm(4/m2/m2/m) : P4/nmm |
| Laurionite | PbCl(OH) | Orth. mmm(2/m2/m2/m) |
| Matlockite | PbFCl | Tet. 4/mmm(4/m2/m2/m) : P4/nmm |
| Paralaurionite | PbCl(OH) | Mon. 2/m : B2/m |
| Zavaritskite | (BiO)F | Tet. 4/mmm(4/m2/m2/m) : P4/nmm |
Related Minerals - Strunz-mindat Grouping
| 3.DC. | Gajardoite | KCa0.5As3+4O6Cl2 · 5H2O |
| 3.DC. | Lucabindiite | (K,NH4)As4O6(Cl,Br) |
| 3.DC. | Cuatrocapaite-(NH4) | (NH4)3(NaMg◻)(As2O3)6Cl6 · 16H2O |
| 3.DC. | Cuatrocapaite-(K) | K3(NaMg◻)(As2O3)6Cl6 · 16H2O |
| 3.DC. | Napoliite | Pb2OFCl |
| 3.DC. | Torrecillasite | Na(As,Sb)3+4O6Cl |
| 3.DC.05 | Paralaurionite | PbCl(OH) |
| 3.DC.05 | Laurionite | PbCl(OH) |
| 3.DC.05 | Mauriziodiniite | (NH4)(As2O3)2I |
| 3.DC.05 | Russoite | (NH4)ClAs2O3(H2O)0.5 |
| 3.DC.10 | Fiedlerite | Pb3FCl4(OH) · H2O |
| 3.DC.15 | Penfieldite | Pb2Cl3(OH) |
| 3.DC.15 | Telluroperite | Pb3TeO4Cl2 |
| 3.DC.20 | Laurelite | Pb7F12Cl2 |
| 3.DC.25 | Zhangpeishanite | BaFCl |
| 3.DC.25 | Matlockite | PbFCl |
| 3.DC.25 | Zavaritskite | (BiO)F |
| 3.DC.25 | Bismoclite | BiOCl |
| 3.DC.25 | Vegrandisite | BaCl2 |
| 3.DC.30 | Nadorite | PbSbClO2 |
| 3.DC.30 | Perite | PbBiClO2 |
| 3.DC.40 | Thorikosite | Pb3Cl2(OH)(SbO3,AsO3) |
| 3.DC.45 | Mereheadite | Pb47Cl25(OH)13O24(CO3)(BO3)2 |
| 3.DC.50 | Blixite | Pb8O5(OH)2Cl4 |
| 3.DC.52 | Rumseyite | Pb2OClF |
| 3.DC.55 | Vladkrivovichevite | [Pb32O18][Pb4Mn2O]Cl14(BO3)8 · 2H2O |
| 3.DC.55 | Pinalite | Pb3WO5Cl2 |
| 3.DC.57 | Yeomanite | Pb2O(OH)Cl |
| 3.DC.60 | Symesite | Pb10(SO4)O7Cl4 · H2O |
| 3.DC.60 | 'Lorettoite' | Pb7O6Cl2 |
| 3.DC.62 | 'Sarawakite (of Frenzel)' | Sb, O, Cl (?) |
| 3.DC.65 | Ecdemite | Pb6As3+2O7Cl4 |
| 3.DC.70 | Mendipite | Pb3Cl2O2 |
| 3.DC.75 | Damaraite | Pb3Cl(OH)O2 |
| 3.DC.80 | Onoratoite | Sb8Cl2O11 |
| 3.DC.95 | Barstowite | Pb4Cl6(CO3) · H2O |
Fluorescence of Rorisite
Weak violet fluorescence with 360 nm UV.
Other Information
Thermal Behaviour:
Fusibility 1.5; red flame coloration. In closed tube, fuses and forms a colorless liquid that crystallizes into a white transparent substance three seconds after removing the flame.
Notes:
Soluble in H2O and hygroscopic.
In moist air the colorless plates become turbid and coated with colorless drops of CaCl2 solution; the turbid plates consist of fine-grained fluorite.
Slowly soluble in HCl and HNO3; dissolves glass when mixed with H2SO4.
In moist air the colorless plates become turbid and coated with colorless drops of CaCl2 solution; the turbid plates consist of fine-grained fluorite.
Slowly soluble in HCl and HNO3; dissolves glass when mixed with H2SO4.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Rorisite
mindat.org URL:
https://www.mindat.org/min-3446.html
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References for Rorisite
Localities for Rorisite
Showing 4 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Russia | |
| Cesnokov et al. (1998) |
| Chesnokov et al. (1990) +1 other reference |
| I. V. Kulikov et al. (1982) +1 other reference |
Ukraine | |
| Шарыгин (2015) |
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Kopeysk, Chelyabinsk Oblast, Russia