Varulite Mineral Data

General Varulite Information

Chemical Formula:

NaCaMn(Mn,Fe++,Fe+++)2(PO4)3

Composition:

Molecular Weight = 513.48 gm

Sodium 4.48 % Na 6.04 % Na₂O

Calcium 7.81 % Ca 10.92 % CaO

Manganese 24.07 % Mn 31.08 % MnO

Iron 8.16 % Fe 7.00 % FeO / 3.89 % Fe₂O₃

Phosphorus 18.10 % P 41.47 % P₂O₅

Oxygen 37.39 % O

______ ______

100.00 % 100.39 % = TOTAL OXIDE

Empirical Formula:

NaCaMn²⁺_2.25Fe²⁺_0.5Fe³⁺_0.25(PO₄)₃

IMA Status:

Valid Species (Pre-IMA) 1937

Locality:

Verutrask pegmatite, Boliden mine, Skelleftea, Vasterbottea, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Varulite

Varulite Image

Images:

Varulite

Comments: Dark brown to dark green varulite in white feldspar.
Location: Varutrask, Vasterbotten, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Varulite Crystallography

Axial Ratios:

a:b:c =0.9497:1:0.5151

Cell Dimensions:

a = 11.91, b = 12.54, c = 6.46, Z = 4; beta = 114.98° V = 874.56 Den(Calc)= 3.90

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c

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

By Intensity(I/I_o): 2.74(1), 2.56(0.4), 3.4(0.4),

Physical Properties of Varulite

Cleavage:

{100} Good, {010} Distinct

Color:

Yellow green, Olive green.

Density:

3.581

Diaphaneity:

Translucent

Habit:

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

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

greenish white

Optical Properties of Varulite

Gladstone-Dale:

CI meas= -0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.069 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1833,KPDmeas= 0.1997,KC= 0.1969
Ncalc = 1.71 - 1.77

Optical Data:

Biaxial (+), a=1.708, g=1.722, bire=0.0140, 2V(Meas)=70. Dispersion r > v.

Pleochroism (x):

yellow green.

Pleochroism (z):

grass green.

Calculated Properties of Varulite

Electron Density:

Bulk Density (Electron Density)=3.46 gm/cc
note: Specific Gravity of Varulite =3.58 gm/cc.

Fermion Index:

Fermion Index = 0.0020141656
Boson Index = 0.9979858344

Photoelectric:

PE_Varulite= 10.55 barns/electron
U=PE_Varulite x rElectron Density= 36.45 barns/cc.

Radioactivity:

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

Varulite Classification

Dana Class:

38.02.03.03 (38)Anhydrous Phosphates, etc

(38.02)(A+ B++)5 (XO4)3

(38.02.03)Alluaudite-Wyllieite Group (Alluaudite Subgroup)

38.02.03.01 Ferrohagendorfite* (Na,Ca)2Fe(Fe,Fe)2(PO4)3 I 2₁/a 2/m

38.02.03.02 Hagendorfite NaCaMn(Fe,Fe,Mg)2(PO4)3 I 2₁/a 2/m

38.02.03.03 Varulite NaCaMn(Mn,Fe,Fe)2(PO4)3 C 2/c 2/m

38.02.03.04 Maghagendorfite NaMgMn(Fe,Fe)2(PO4)3 I 2₁/a 2/m

38.02.03.05 Ferroalluaudite NaCaFe(Fe,Mn,Fe,Mg)2(PO4)3 C 2/a 2/m

38.02.03.06 Alluaudite NaCaFe(Mn,Fe,Fe,Mg)2(PO4)3 C 2/c 2/m

38.02.03.07 Odanielite Na(Zn,Mg)3H2(AsO4)3 C 2/c 2/m

38.02.03.08 Johillerite Na(Mg,Zn)3Cu(AsO4)3 I2/c 2/m

38.02.03.09 Nickenichite Na0,8Ca0,4(Mg,Fe,Al)3Cu0,4(AsO4)3 C 2/c 2/m

38.02.03.10 Yazganite! NaFe2(Mg,Mn)(AsO4)3•H2O C 2/c 2/m

38.02.03.11 IMA2008-054! NaCaMn2(PO4)[PO3(OH)]2 C 2/c 2/m

38.02.03.12 IMA2008-064! Na16Mn25Al8(PO4)30 Pc m

Strunz Class:

08.AC.10 08 - PHOSPHATES, ARSENATES, VANADATES

08.A - Phosphates, etc. without additional anions, without H2O

08.AC -With medium-sized and large cations

08.AC.10 Alluaudite NaCaFe(Mn,Fe,Fe,Mg)2(PO4)3 C 2/c 2/m

08.AC.10 Arseniopleite (Ca,Na)(Na,Pb)Mn(Mn,Mg,Fe)2(AsO4)3 I2/a 2/m

08.AC.10 Ferrohagendorfite* (Na,Ca)2Fe(Fe,Fe)2(PO4)3 I 2₁/a 2/m

08.AC.10 Caryinite (Na,Pb)(Ca,Na)(Ca,Mn)(Mn,Mg)2(AsO4)3 I2/c 2/m

08.AC.10 Hagendorfite NaCaMn(Fe,Fe,Mg)2(PO4)3 I 2₁/a 2/m

08.AC.10 Johillerite Na(Mg,Zn)3Cu(AsO4)3 I2/c 2/m

08.AC.10 Ferroalluaudite NaCaFe(Fe,Mn,Fe,Mg)2(PO4)3 C 2/a 2/m

08.AC.10 Odanielite Na(Zn,Mg)3H2(AsO4)3 C 2/c 2/m

08.AC.10 Maghagendorfite NaMgMn(Fe,Fe)2(PO4)3 I 2₁/a 2/m

08.AC.10 Nickenichite Na0,8Ca0,4(Mg,Fe,Al)3Cu0,4(AsO4)3 C 2/c 2/m

08.AC.10 Varulite NaCaMn(Mn,Fe,Fe)2(PO4)3 C 2/c 2/m

08.AC.10 Bradaczekite! NaCu4(AsO4)3 C 2/c 2/m

08.AC.10 Yazganite! NaFe2(Mg,Mn)(AsO4)3•H2O C 2/c 2/m

08.AC.10 IMA2008-054! NaCaMn2(PO4)[PO3(OH)]2 C 2/c 2/m

Other Varulite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Varulite :
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 Varulite Specimen Label here :

Varulite

NaCaMn(Mn,Fe++,Fe+++)2(PO4)3
Dana No: 38.02.03.03 Strunz No: 08.AC.10
Locality:

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