Varulite Mineral Data

Varulite Mineral Data +

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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.

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 - PrismaticH-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

Diaphaniety:

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

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:

r_electron=3.76 gm/cc
note: r_Varulite=3.90 gm/cc.

Fermion Index

Fermion Index = 0.00201
Boson Index = 0.99799

Photoelectric:

PE_Varulite= 10.55 barns/electron
U=PE_Varulite x r_electron= 39.70 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Varulite is Not Radioactive

Varulite Classification

Dana Class:

38.2.3.3 (38)Anhydrous Phosphates, etc

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

(38.2.3)Alluaudite-Wyllieite Group (Alluaudite Subgroup)

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

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

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

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

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

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

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

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

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

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

Strunz Class:

VII/A.06-100 VII - Phosphates, Arsenates and Vanadates

VII/A - Waterfree phosphates [PO4]3- without unfamiliar anions, cations of medium and big size: Mg, Mn,Fe, Cu, Zn, and Ca, Na

VII/A.06 - Alluaudite- Hagendorfite group

VII/A.06-10 Qingheiite Na2(Mn,Mg,Fe)(Al,Fe)(PO4)3 P 2₁/n 2/m

VII/A.06-20 Bobfergusonite Na2Mn5FeAl(PO4)6 P 2₁/n 2/m

VII/A.06-30 Ferrowyllieite (Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO4)3 P 2₁/n 2/m

VII/A.06-40 Wyllieite (Na,Ca,Mn)(Mn,Fe)(Fe,Fe,Mg)Al(PO4)3 P 2₁/n 2/m

VII/A.06-50 Rosemaryite (Na,Ca,Mn)(Mn,Fe)(Fe,Fe,Mg)Al(PO4)3 P 2₁/n 2/m

VII/A.06-60 Ferroalluaudite NaCaFe(Fe,Mn,Fe,Mg)2(PO4)3 C 2/a 2/m

VII/A.06-70 Alluaudite NaCaFe(Mn,Fe,Fe,Mg)2(PO4)3 C 2/c 2/m

VII/A.06-80 Maghagendorfite NaMgMn(Fe,Fe)2(PO4)3 I 2₁/a 2/m

VII/A.06-85 Ferrohagendorfite* (Na,Ca)2Fe(Fe,Fe)2(PO4)3 I 2₁/a 2/m

VII/A.06-90 Hagendorfite NaCaMn(Fe,Fe,Mg)2(PO4)3 I 2₁/a 2/m

VII/A.06-100 Varulite NaCaMn(Mn,Fe,Fe)2(PO4)3 C 2/c 2/m

VII/A.06-110 Arseniopleite (Ca,Na)(Na,Pb)Mn(Mn,Mg,Fe)2(AsO4)3 I2/a 2/m

VII/A.06-120 Caryinite (Na,Pb)(Ca,Na)(Ca,Mn)(Mn,Mg)2(AsO4)3 I2/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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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

Varulite

NaCaMn(Mn,Fe++,Fe+++)2(PO4)3
Dana No: 38.2.3.3 Strunz No: VII/A.06-100
Locality:

Notes: