Rosemaryite Mineral Data

General Rosemaryite Information

Chemical Formula:

(Na,Ca,Mn++)(Mn++,Fe++)(Fe+++,Fe++,Mg)Al(PO4)3

Composition:

Molecular Weight = 441.80 gm

Sodium 3.12 % Na 4.21 % Na₂O

Calcium 1.81 % Ca 2.54 % CaO

Magnesium 0.55 % Mg 0.91 % MgO

Manganese 11.19 % Mn 14.45 % MnO

Aluminum 3.66 % Al 6.92 % Al₂O₃

Iron 15.17 % Fe 4.88 % FeO / 16.27 % Fe₂O₃

Phosphorus 21.03 % P 48.19 % P₂O₅

Oxygen 43.46 % O

______ ______

100.00 % 98.37 % = TOTAL OXIDE

Empirical Formula:

Na_0.6Mn²⁺_0.2Ca_0.2Mn²⁺_0.7Fe²⁺_0.3Fe³⁺_0.9Mg_0.1Al_0.6(PO₄)₃

Environment:

In a zoned, complex granite pegmatite.

IMA Status:

Approved IMA 1978

Locality:

Rock Ridge pegmatite, near Custer, Custer County, South Dakota, USA. Link to MinDat.org Location Data.

Name Origin:

Named for F. Rosemay Wyllie wife of Professor Peter J. Wyllie, namesake of wyllieite.

Name Pronunciation:

Rosemaryite + Pronunciation

Rosemaryite Crystallography

Axial Ratios:

a:b:c =0.9584:1:0.5131

Cell Dimensions:

a = 11.868, b = 12.382, c = 6.354, Z = 4; beta = 114.52° V = 849.51 Den(Calc)= 3.45

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/n

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

By Intensity(I/I_o): 2.674(1), 2.693(1), 6.15(0.6),

Physical Properties of Rosemaryite

Cleavage:

{???} Distinct

Color:

Bluish green, Dark green, Deep brown, Reddish brown.

Density:

3.6 - 3.601, Average = 3.6

Diaphaneity:

Transparent to Translucent

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Hardness:

4-4.5 - Between Fluorite and Apatite

Luster:

Vitreous - Metallic

Streak:

greenish white

Optical Properties of Rosemaryite

Gladstone-Dale:

CI meas= 0.07 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.029 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2005,KPDmeas= 0.1921,KC= 0.2066
Ncalc = 1.71 - 1.74

Optical Data:

Biaxial (+), a=1.688, b=1.691, g=1.696, bire=0.0080, 2V(Calc)=76, 2V(Meas)=80.

Pleochroism (x):

pale brownish yellow.

Pleochroism (y):

pale brownish yellow.

Pleochroism (z):

pale greenish yellow.

Calculated Properties of Rosemaryite

Electron Density:

Bulk Density (Electron Density)=3.35 gm/cc
note: Specific Gravity of Rosemaryite =3.45 gm/cc.

Fermion Index:

Fermion Index = 0.0039990059
Boson Index = 0.9960009941

Photoelectric:

PE_Rosemaryite= 8.82 barns/electron
U=PE_Rosemaryite x rElectron Density= 29.52 barns/cc.

Radioactivity:

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

Rosemaryite Classification

Dana Class:

38.02.04.03 (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 Rosemaryite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(AntBidBlaNic4) OPTIC PROP.(AntBidBlaNic4)

See Also:

Links to other databases for Rosemaryite :
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

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

Rosemaryite

(Na,Ca,Mn++)(Mn++,Fe++)(Fe+++,Fe++,Mg)Al(PO4)3
Dana No: 38.02.04.03 Strunz No: 08.AC.15
Locality:

Notes:

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