Raadeite Mineral Data

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General Raadeite Information

Chemical Formula:

Mg7(PO4)2(OH)8

Composition:

Molecular Weight = 493.69 gm

Magnesium 33.38 % Mg 55.35 % MgO

Manganese 0.22 % Mn 0.29 % MnO

Iron 0.23 % Fe 0.29 % FeO

Arsenic 0.30 % As 0.47 % As₂O₅

Phosphorus 12.30 % P 28.18 % P₂O₅

Hydrogen 1.72 % H 15.36 % H₂O

Oxygen 51.85 % O

______ ______

100.00 % 99.94 % = TOTAL OXIDE

Empirical Formula:

Mg_6.78Fe²⁺_0.02Mn²⁺_0.02P_1.96As_0.02H_8.42O₁₆

Environment:

Low pressure and temperature metamorphic mineral in apatite-rich nodules in sepentine. The magnesium and phosphate dominant analog of allactite.

IMA Status:

Approved IMA 2001 (Dana # Added)

Locality:

Serpentinite body near Tingelstadtjern in the Modum district of southern Norway. Link to MinDat.org Location Data.

Name Origin:

Named for Gunnar Raade (1944-), minerals curator at the Natural History Museum, Oslo, Norway.

Synonym:

IMA1996-034

Raadeite Image

Images:

Raadeite Heneuite

Comments: Translucent aqua colored greasy heneuite grain, surrounded by beige rim of raadeite, with dark blue phosphoellenbergerite inclusion (near top of heneuite), in quartz apatite rock.
Location: Tingelstadt Iron Mine, Modum, Buskerud, Norway. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Raadeite

Comments: Black and white image of a petrographic thin section showing two crystals of raadeite (arrows) included in holtedahlite. (Eur. J. Mineral, 13:320).
Location: Nodules of apatite + Mg-phosphates within the Tingelstadtjern serpentinite body, Modum district, Norway. Scale: See Image.
© Eur. J. Mineral

Raadeite Crystallography

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

By Intensity(I/I_o): 2.905(1)(131), 3.521(0.8)(122,121), 2.199(0.8)(142,202),2.794(0.75)(023,041), 4.436(0.75)(111), 3.087(0.7)(013), 3.145(0.7)(122),

Crystal Structure:

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Chopin C , Ferraris G , Prencipe M , Brunet F , Medenbach O , European Journal of Mineralogy , 13 (2001) p.319-327, Raadeite, Mg7(PO4)2(OH)8: a new dense-packed phosphate, from Modum (Norway), Locality: Modum, Norway

Physical Properties of Raadeite

Color:

Colorless.

Optical Properties of Raadeite

Gladstone-Dale:

CI calc= 0 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2163,KC= 0.2164
Ncalc = 1.6

Calculated Properties of Raadeite

Electron Density:

Bulk Density (Electron Density)=2.81 gm/cc
note: Specific Gravity of Raadeite =2.79 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Raadeite= 1.68 barns/electron
U=PE_Raadeite x rElectron Density= 4.71 barns/cc.

Radioactivity:

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

Raadeite Classification

Dana Class:

41.02.01.02 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.02)where (A B)7 (XO4)2 Zq

(41.02.01)Allactite Group

41.02.01.01 Allactite Mn7(AsO4)2(OH)8 P 2₁/a 2/m

41.02.01.02 Raadeite! Mg7(PO4)2(OH)8 P 2₁/n 2/m

41.02.01.03 Waterhouseite! Mn7(PO4)2(OH)8 P 2₁/c 2/m

Strunz Class:

08.BE.30 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BE -With only medium-sized cations, (OH, etc.):RO4 > 2:1

08.BE.30 Allactite Mn7(AsO4)2(OH)8 P 2₁/a 2/m

08.BE.30 Flinkite Mn2Mn(AsO4)(OH)4 P nma 2/m 2/m 2/m

08.BE.30 Raadeite! Mg7(PO4)2(OH)8 P 2₁/n 2/m

Other Raadeite Information

See Also:

Links to other databases for Raadeite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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

Raadeite

Mg7(PO4)2(OH)8
Dana No: 41.02.01.02 Strunz No: 08.BE.30
Locality:

Notes: