Raadeite
A valid IMA mineral species
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About Raadeite
Gunnar Raade
Formula:
Mg7(PO4)2(OH)8
Colour:
Colourless
Lustre:
Pearly
Specific Gravity:
2.806 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
For Dr. Gunnar Raade (1944-), Senior Curator of Minerals Emeritus, Natural History Museum, Oslo, Norway, in recognition of his contribution to the mineralogy of magnesium phosphates.
Type Locality:
Unique Identifiers
Mindat ID:
7018
Long-form identifier:
mindat:1:1:7018:4
Similar Names
| Radauite | A synonym of 'Labradorite' | |
| Reidite | A valid IMA mineral species | Zr(SiO4) |
| Rudite | A rock classification type |
IMA Classification of Raadeite
Classification of Raadeite
8.BE.30
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
E : With only medium-sized cations, (OH, etc.):RO4 > 2:1
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
E : With only medium-sized cations, (OH, etc.):RO4 > 2:1
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 |
|---|---|---|
| Raa | 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 Raadeite
Optical Data of Raadeite
Type:
Biaxial (-)
RI values:
nα = 1.5945 nβ = 1.6069 nγ = 1.6088
2V:
Measured: 45° , Calculated: 42°
Max. Birefringence:
δ = 0.014
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:
Moderate
Dispersion:
r > v strong
Chemistry of Raadeite
Mindat Formula:
Mg7(PO4)2(OH)8
Element Weights:
Elements listed:
Crystallography of Raadeite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 5.259 Å, b = 11.647 Å, c = 9.655 Å
β = 95.94°
β = 95.94°
Ratio:
a:b:c = 0.452 : 1 : 0.829
Unit Cell V:
587.2 ų
Z:
2
Comment:
Spacegroup P2 1 /n
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0006857 | Raadeite | Chopin C, Ferraris G, Prencipe M, Brunet F, Medenbach O (2001) Raadeite, Mg7(PO4)2(OH)8: a new dense-packed phosphate from Modum (Norway) European Journal of Mineralogy 13 319-327 | 2001 | Modum, Norway | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.436 Å | (75) |
| 3.521 Å | (80) |
| 3.145 Å | (70) |
| 3.087 Å | (70) |
| 2.905 Å | (100) |
| 2.794 Å | (75) |
| 2.199 Å | (80) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 3b: Earth’s earliest hydrosphere | >4.45 |
| 13 : Hadean serpentinization | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47c : [Carbonates, phosphates, borates, nitrates] |
Type Occurrence of Raadeite
General Appearance of Type Material:
Veinlets of a few tens of μm wide; as fibrous coronae with apatite, altausite, magnesite replacing cm-size heneuite; as rare, up to 150µm large anhedral inclusions in holtedahlite
Place of Conservation of Type Material:
In the Musée de Minéralogie, École des Mines, Paris, France
Geological Setting of Type Material:
In nodules of apatite and magnesium phopspates in a serpentinite body
Associated Minerals at Type Locality:
Synonyms of Raadeite
Other Language Names for Raadeite
Relationship of Raadeite to other Species
Member of:
Other Members of Allactite Group:
Common Associates
Associations Based on Photo Data:
| 6 photos of Raadeite associated with Althausite | Mg4(PO4)2(OH,O)(F,◻) |
| 4 photos of Raadeite associated with Heneuite | CaMg5(CO3)(PO4)3(OH) |
| 3 photos of Raadeite associated with Chlorapatite | Ca5(PO4)3Cl |
| 3 photos of Raadeite associated with Phosphoellenbergerite | (Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6 |
| 2 photos of Raadeite associated with 'Apatite' | Ca5(PO4)3A |
| 1 photo of Raadeite associated with Hematite | Fe2O3 |
| 1 photo of Raadeite associated with Holtedahlite | Mg2(PO4)(OH) |
Related Minerals - Strunz-mindat Grouping
| 8.BE.05 | Augelite | Al2(PO4)(OH)3 |
| 8.BE.10 | Grattarolaite | Fe3+3(PO4)O3 |
| 8.BE.15 | Cornetite | Cu3(PO4)(OH)3 |
| 8.BE.20 | Clinoclase | Cu3(AsO4)(OH)3 |
| 8.BE.25 | Gilmarite | Cu3(AsO4)(OH)3 |
| 8.BE.25 | Arhbarite | Cu2Mg(AsO4)(OH)3 |
| 8.BE.30 | Flinkite | Mn2+2Mn3+(AsO4)(OH)4 |
| 8.BE.30 | Argandite | Mn7(VO4)2(OH)8 |
| 8.BE.30 | Allactite | Mn2+7(AsO4)2(OH)8 |
| 8.BE.35 | 'Mineral E (of Dunn, et. al., 1982)' | |
| 8.BE.35 | Chlorophoenicite | (Mn,Mg)3Zn2(AsO4)(OH,O)6 |
| 8.BE.35 | Magnesiochlorophoenicite | (Mg,Mn)3Zn2(AsO4)(OH,O)6 |
| 8.BE.40 | Gerdtremmelite | (Zn,Fe)(Al,Fe)2(AsO4)(OH)5 |
| 8.BE.45 | Dixenite | CuMn2+14Fe2+(SiO4)2(As5+O4)(As3+O3)5(OH)6 |
| 8.BE.45 | Mcgovernite | Mn19Zn3(AsO4)3(AsO3)(SiO4)3(OH)21 |
| 8.BE.45 | Hematolite | (Mn,Mg,Al,Fe3+)15(As5+O4)2(As3+O3)(OH)23 |
| 8.BE.45 | Turtmannite | (Mn,Mg)22.5Mg3-3x((V5+,As5+)O4)3(As3+O3)x(SiO4)3O5-5x(OH)20+x |
| 8.BE.45 | Carlfrancisite | Mn2+3(Mn2+,Mg,Fe3+,Al)42[As3+O3]2(As5+O4)4[(Si,As5+)O4]6[(As5+,Si)O4]2(OH)42 |
| 8.BE.45 | Arakiite | (Zn,Mn2+)(Mn2+,Mg)12(Fe3+,Al)2(As5+O4)2(As3+O3)(OH)23 |
| 8.BE.45 | Kraisslite | Zn3(Mn,Mg)25(Fe3+,Al)(As3+O3)2[(Si,As5+)O4]10(OH)16 |
| 8.BE.50 | Synadelphite | Mn2+9(As5+O4)2(As3+O3)(OH)9 · 2H2O |
| 8.BE.55 | Holdenite | (Mn2+,Mg)6Zn3(AsO4)2(SiO4)(OH)8 |
| 8.BE.60 | Kolicite | Mn2+7Zn4(AsO4)2(SiO4)2(OH)8 |
| 8.BE.65 | Sabelliite | (Cu,Zn)2Zn(AsO4,SbO4)(OH)3 |
| 8.BE.70 | Jarosewichite | Mn2+3Mn3+(AsO4)(OH)6 |
| 8.BE.75 | Theisite | Cu5Zn5(AsO4,SbO4)2(OH)14 |
| 8.BE.80 | Coparsite | Cu4(AsO4,VO4)O2Cl |
| 8.BE.85 | Waterhouseite | Mn2+7(PO4)2(OH)8 |
| 8.BE.90 | Vasilseverginite | Cu9O4(AsO4)2(SO4)2 |
Other Information
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 Raadeite
mindat.org URL:
https://www.mindat.org/min-7018.html
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References for Raadeite
Localities for Raadeite
Showing 1 localities.
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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.
Norway (TL) | |
| Chopin et al. (2001) |
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Tingelstadtjern Quarry, Modum, Buskerud, Norway