Ferrorosemaryite Mineral Data
General Ferrorosemaryite Information
Chemical Formula:
[ ]NaFe++Fe+++Al(PO4)3
Composition:
Molecular Weight = 454.58 gm
Sodium 2.12 % Na 2.86 % Na2 O
Calcium 0.35 % Ca 0.49 % CaO
Magnesium 0.11 % Mg 0.18 % MgO
Manganese 6.28 % Mn 8.11 % MnO
Aluminum 4.87 % Al 9.20 % Al2 O3
Iron 23.59 % Fe 11.22 % FeO / 21.25 % Fe2 O3
Phosphorus 20.44 % P 46.84 % P2 O5
Oxygen 42.24 % O
______ ______
100.00 % 100.16 % = TOTAL OXIDE
Empirical Formula:
Na0.42 Mn2+ 0.28 Ca0.04 Fe2+ 0.71 Mn2+ 0.24 Fe3+ 0.05 Fe3+ Al0.82 Fe3+ 0.16 Mg0.02 (PO4 )3
Environment:
Found in embedded in scorzalite from cotan-bearing pegmatites that cut across dark-gray schists and quartzites of the Mesoproterozoic Kibuye formation. Wyllieite group.
IMA Status:
Approved IMA 2003 (Dana # Added)
Locality:
Rubindi-Kabilizi pegmatite, located 3 km WNW of Muhororo village, south of the Rubindi river, 50 km west of Kigali, Rwanda. Link to MinDat.org Location Data.
Name Origin:
Named as the Fe-dominant analogue of rosemaryite.
Synonym:
IMA2003-063
Ferrorosemaryite Image
Images:
Ferrorosemaryite
Comments: B&W PPL image of idiomorphic, semi-opague grains of ferrorosemaryite in white scorzalite. (Eur J Mineralogy, v17:749.
Location: Rubindi pegmatite, Rwanda.
Scale: See Image.
© Eur. J. Mineral
Ferrorosemaryite Crystallography
Axial Ratios:
a:b:c =0.9587:1:0.51
Cell Dimensions:
a = 11.838, b = 12.347, c = 6.2973, Z = 4; beta = 114.353° V = 838.54 Den(Calc)= 3.60
Crystal System:
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21 /n
X Ray Diffraction:
By Intensity(I/Io ): 2.677(1)(240 ), 2.693(0.75)(400 ), 3.448(0.65)(310 ), 6.167(0.5)(020 ), 4.054(0.45)(220 ), 3.011(0.4)(112 ), 5.382(0.4)(200 ), 8.102(0.3)(110 ), 2.468(0.2)(420 ),
Physical Properties of Ferrorosemaryite
Cleavage:
{010} Perfect, {101} Good
Color:
Dark green, Bronze.
Diaphaneity:
Transparent
Fracture:
Brittle - Irregular - Very brittle fracture producing irregular fragments
Habit:
Anhedral Grains - Granular minerals without the expression of crystal shapes
Hardness:
4 - Fluorite
Luster:
Resinous
Streak:
greenish brown
Optical Properties of Ferrorosemaryite
Gladstone-Dale:
CI calc = 0.028 (Excellent) - where the CI = (1-KPDcalc /KC ) KPDcalc = 0.2095,KC = 0.2156 Ncalc = 1.78
Optical Data:
Biaxial (-), a=1.73, b=1.758, g=1.775, bire=0.0450, 2V(Calc)=74, 2V(Meas)=82. Dispersion strong, r < v.
Calculated Properties of Ferrorosemaryite
Electron Density:
Bulk Density (Electron Density)=3.49 gm/cc note: Specific Gravity of Ferrorosemaryite =3.60 gm/cc.
Fermion Index:
Fermion Index = 0.0053151001 Boson Index = 0.9946848999
Photoelectric:
PEFerrorosemaryite = 9.89 barns/electronU=PEFerrorosemaryite x r Electron Density= 34.51 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Ferrorosemaryite is Not Radioactive
Ferrorosemaryite Classification
Dana Class:
38.02.04.07 (38) Anhydrous Phosphates, etc
(38.02) (A+ B++)5 (XO4)3
(38.02.04) Alluaudite-Wyllieite Group (Wyllieite Subgroup)
38.02.04.01 Ferrowyllieite (Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO4)3 P 21 /n 2/m
38.02.04.02 Wyllieite (Na,Ca,Mn)(Mn,Fe)(Fe,Fe,Mg)Al(PO4)3 P 21 /n 2/m
38.02.04.03 Rosemaryite (Na,Ca,Mn)(Mn,Fe)(Fe,Fe,Mg)Al(PO4)3 P 21 /n 2/m
38.02.04.04 Qingheiite Na2(Mn,Mg,Fe)(Al,Fe)(PO4)3 P 21 /n 2/m
38.02.04.05 Bobfergusonite Na2Mn5FeAl(PO4)6 P 21 /n 2/m
38.02.04.06 Bradaczekite ! NaCu4(AsO4)3 C 2/c 2/m
38.02.04.07 Ferrorosemaryite ! []NaFeFeAl(PO4)3 P 21 /n 2/m
Strunz Class:
08.AC.15 08 - PHOSPHATES, ARSENATES, VANADATES
08.A - Phosphates, etc. without additional anions, without H2O
08.AC -With medium-sized and large cations
08.AC.15 Bobfergusonite Na2Mn5FeAl(PO4)6 P 21 /n 2/m
08.AC.15 Ferrowyllieite (Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO4)3 P 21 /n 2/m
08.AC.15 Qingheiite Na2(Mn,Mg,Fe)(Al,Fe)(PO4)3 P 21 /n 2/m
08.AC.15 Rosemaryite (Na,Ca,Mn)(Mn,Fe)(Fe,Fe,Mg)Al(PO4)3 P 21 /n 2/m
08.AC.15 Wyllieite (Na,Ca,Mn)(Mn,Fe)(Fe,Fe,Mg)Al(PO4)3 P 21 /n 2/m
08.AC.15 Ferrorosemaryite ! []NaFeFeAl(PO4)3 P 21 /n 2/m
Other Ferrorosemaryite Information
References:
NAME( AmMin, v91, p1203) PHYS. PROP.(AmMin, v91, p1203) OPTIC PROP.(AmMin, v91, p1203)
See Also:
Links to other databases for Ferrorosemaryite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Ferrorosemaryite
[ ]NaFe++Fe+++Al(PO4)3
Dana No: 38.02.04.07 Strunz No: 08.AC.15
Locality:
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