Darapiosite Mineral Data
General Darapiosite Information
Chemical Formula:
KNa2Zr[Li(Mn,Zr)2Si12O30]
Composition:
Molecular Weight = 1,128.27 gm
Potassium 3.47 % K 4.17 % K2 O
Sodium 4.08 % Na 5.49 % Na2 O
Lithium 0.62 % Li 1.32 % Li2 O
Zirconium 12.13 % Zr 16.38 % ZrO2
Manganese 7.30 % Mn 9.43 % MnO
Silicon 29.87 % Si 63.90 % SiO2
Oxygen 42.54 % O
______ ______
100.00 % 100.71 % = TOTAL OXIDE
Empirical Formula:
KNa2 ZrLiMn2+ 1.5 Zr0.5 Si12 O30
Environment:
Peri-alkaline pegmatitic rocks.
IMA Status:
Approved IMA 1975
Locality:
Dara-i-Pioz, Alai Range, Tien Shan, northern Tadzhikistan. Link to MinDat.org Location Data.
Name Origin:
Named for the locality.
Name Pronunciation:
Darapiosite + Pronunciation
Darapiosite Crystallography
Axial Ratios:
a:c = 1:1.39437
Cell Dimensions:
a = 10.32, c = 14.39, Z = 2; V = 1,327.24 Den(Calc)= 2.82
Crystal System:
Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 6/mcc
X Ray Diffraction:
By Intensity(I/Io ): 3.26(1), 2.93(0.65), 2.56(0.55),
Physical Properties of Darapiosite
Color:
Blue, Brown, Brownish white, Colorless, White.
Density:
2.92
Diaphaneity:
Transparent to Translucent
Hardness:
5 - Apatite
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Darapiosite
Gladstone-Dale:
CI meas = 0.053 (Good) - where the CI = (1-KPDmeas /KC ) CI calc = 0.019 (Superior) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2048,KPDmeas = 0.1978,KC = 0.2088 Ncalc = 1.59 - 1.61
Optical Data:
Uniaxial (-), e=1.575, w=1.58, bire=0.0050.
Calculated Properties of Darapiosite
Electron Density:
Bulk Density (Electron Density)=2.75 gm/cc note: Specific Gravity of Darapiosite =2.82 gm/cc.
Fermion Index:
Fermion Index = 0.02 Boson Index = 0.98
Photoelectric:
PEDarapiosite = 19.44 barns/electronU=PEDarapiosite x r electron = 53.39 barns/cc.
Radioactivity:
GRapi = 48.70 (Gamma Ray American Petroleum Institute Units)
Concentration of Darapiosite per GRapi unit = 2.05 (%)
Estimated Radioactivity from Darapiosite - barely detectable
Darapiosite Classification
Dana Class:
63.02.01a.03 (63) Cyclosilicate Condensed Rings
(63.02) 6-membered rings
(63.02.01a) Milarite - Osumilite group (Milarite - Osumilite subgroup)
63.02.01a.01 Brannockite KSn2Li3Si12O30 P 6/mcc 6/m 2/m 2/m
63.02.01a.02 Chayesite K(Mg,Fe)4Fe(Si12O30) P 6/mcc 6/m 2/m 2/m
63.02.01a.03 Darapiosite KNa2Zr[Li(Mn,Zr)2Si12O30] P 6/mcc 6/m 2/m 2/m
63.02.01a.04 Eifelite KNa3Mg4Si12O30 P 6/mcc 6/m 2/m 2/m
63.02.01a.05 Merrihueite (K,Na)2(Fe,Mg)5Si12O30 P 6/mcc 6/m 2/m 2/m
63.02.01a.06 Osumilite-(Fe) (K,Na)(Fe,Mg)2(Al,Fe)3(Si,Al)12O30 P 6/mcc 6/m 2/m 2/m
63.02.01a.07 Osumilite-(Mg) (K,Na)(Mg,Fe)2(Al,Fe)3(Si,Al)12O30 P 6/mcc 6/m 2/m 2/m
63.02.01a.08 Poudretteite KNa2B3Si12O30 P 6/mcc 6/m 2/m 2/m
63.02.01a.09 Sugilite KNa2(Fe,Mn,Al)2Li3Si12O30 P 6/mcc 6/m 2/m 2/m
63.02.01a.10 Yagiite (Na,K)3Mg4(Al,Mg)6(Si,Al)24O60 P 6/mmc 6/m 2/m 2/m
63.02.01a.11 Dusmatovite K(K,Na,[])(Mn,Y,Zr)2(Zn,Li)3Si12O30 P 6/mcc 6/m 2/m 2/m
63.02.01a.12 Milarite K2Ca4Al2Be4Si24O60•(H2O) P 6/mcc 6/m 2/m 2/m
63.02.01a.13 Sogdianite (K,Na)2(Li,Fe,Al)3ZrSi12O30 P 6/mmm 6/m 2/m 2/m
63.02.01a.14 Roedderite (Na,K)2(Mg,Fe)5Si12O30 P 63 /mmc 6/m 2/m 2/m
63.02.01a.15 Berezanskite ! KLi3Ti2Si12O30 P 6/mcc 6/m 2/m 2/m
63.02.01a.16 Shibkovite ! K(Ca,Mn,Na)2(K2-x,[]x)2ZnSi12O30(x~0.8) P 6/mcc 6/m 2/m 2/m
63.02.01a.17 Trattnerite ! (Fe,Mg)2(Mg,Fe)3(Si12O30) P 6/mcc 6/m 2/m 2/m
63.02.01a.18 Almarudite ! K([],Na)2(Mn,Fe,Mg)2(Be,Al)3[Si12O30] P 6/mcc 6/m 2/m 2/m
63.02.01a.19 Oftedalite ! (Sc,Ca)2KBe3Si12O30 P 6/mmc 6/m 2/m 2/m
63.02.01a.20 Klochite ([]1Na1)KFe2Zn3[Si12O30] P 6/mcc 6/m 2/m 2/m
63.02.01a.21 Friedrichbeckeite ! K([],Na)Mg2(Be2Mg)Si12O30 P 6/mcc 6/m 2/m 2/m
Strunz Class:
09.CM.05 09 - SILICATES (Germanates)
09.C - Cyclosilicates
09.CM -[Si6O18]12- 6-membered double rings (sechser-Doppelringe)
09.CM.05 Brannockite KSn2Li3Si12O30 P 6/mcc 6/m 2/m 2/m
09.CM.05 Armenite BaCa2Al6Si9O30•2(H2O) Pnc2 mm2
09.CM.05 Berezanskite ! KLi3Ti2Si12O30 P 6/mcc 6/m 2/m 2/m
09.CM.05 Dusmatovite K(K,Na,[])(Mn,Y,Zr)2(Zn,Li)3Si12O30 P 6/mcc 6/m 2/m 2/m
09.CM.05 Chayesite K(Mg,Fe)4Fe(Si12O30) P 6/mcc 6/m 2/m 2/m
09.CM.05 Shibkovite ! K(Ca,Mn,Na)2(K2-x,[]x)2ZnSi12O30(x~0.8) P 6/mcc 6/m 2/m 2/m
09.CM.05 Eifelite KNa3Mg4Si12O30 P 6/mcc 6/m 2/m 2/m
09.CM.05 Darapiosite KNa2Zr[Li(Mn,Zr)2Si12O30] P 6/mcc 6/m 2/m 2/m
09.CM.05 Merrihueite (K,Na)2(Fe,Mg)5Si12O30 P 6/mcc 6/m 2/m 2/m
09.CM.05 Roedderite (Na,K)2(Mg,Fe)5Si12O30 P 63 /mmc 6/m 2/m 2/m
09.CM.05 Milarite K2Ca4Al2Be4Si24O60•(H2O) P 6/mcc 6/m 2/m 2/m
09.CM.05 Osumilite-(Fe) (K,Na)(Fe,Mg)2(Al,Fe)3(Si,Al)12O30 P 6/mcc 6/m 2/m 2/m
09.CM.05 Osumilite-(Mg) (K,Na)(Mg,Fe)2(Al,Fe)3(Si,Al)12O30 P 6/mcc 6/m 2/m 2/m
09.CM.05 Poudretteite KNa2B3Si12O30 P 6/mcc 6/m 2/m 2/m
09.CM.05 Sugilite KNa2(Fe,Mn,Al)2Li3Si12O30 P 6/mcc 6/m 2/m 2/m
09.CM.05 Sogdianite (K,Na)2(Li,Fe,Al)3ZrSi12O30 P 6/mmm 6/m 2/m 2/m
09.CM.05 Oftedalite ! (Sc,Ca)2KBe3Si12O30 P 6/mmc 6/m 2/m 2/m
09.CM.05 Yagiite (Na,K)3Mg4(Al,Mg)6(Si,Al)24O60 P 6/mmc 6/m 2/m 2/m
09.CM.05 Trattnerite ! (Fe,Mg)2(Mg,Fe)3(Si12O30) P 6/mcc 6/m 2/m 2/m
09.CM.05 Almarudite ! K([],Na)2(Mn,Fe,Mg)2(Be,Al)3[Si12O30] P 6/mcc 6/m 2/m 2/m
Other Darapiosite Information
References:
NAME( Dana8) PHYS. PROP.(Larousse des Mineraux,1981) OPTIC PROP.(Larousse des Mineraux,1981)
See Also:
Links to other databases for Darapiosite :
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 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
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Darapiosite
KNa2Zr[Li(Mn,Zr)2Si12O30]
Dana No: 63.02.01a.03 Strunz No: 09.CM.05
Locality:
Notes:
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