Quartz Mineral Data

General Quartz Information

Chemical Formula:

SiO2

Composition:

Molecular Weight = 60.08 gm

Silicon 46.74 % Si 100.00 % SiO₂

Oxygen 53.26 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

(SiO₂)

Environment:

Sedimentary, metamorphic, and igneous rocks.

IMA Status:

Valid Species (Pre-IMA) Prehistoric

Locality:

Very common mineral found world wide. Link to MinDat.org Location Data.

Name Origin:

From the German "quarz", of uncertain origin.

Name Pronunciation:

Quartz

Synonym:

Agate - banded variety of chaledony

Amethyst - purple

Avanturine - feebly translucent chalcedony

Carnelian - flesh red chalcedony

Cat's Eye - chatoyant

Chalcedony - microcrystalline quartz

Chert - cryptocrystalline quartz

Chrysoprase - apple green chalcedony

Citrine - yellow

Flint - microcrystalline quartz

Hornstone - flint

Jasper - red or brown chalcedony

Moss Agate - variety of chaledony

Plasma - green chalcedony

Prase - leek green chalcedony

Rock Crystal

Rose Quartz - rose colored

Sapphire Quartz - blue colored

Smoky Quartz - brown to black

Tiger Eye - pseudomorph of asbestos

Quartz Image

Images:

Quartz Calcite

Comments: Purple-colored druse of amethystine quartz and white calcite.
Location: Rio Grande do Sul, Brazil. Scale: Sample size 20 cm.
© Dave Barthelmy

Images:

Chalcopyrite Quartz

Comments: Well-formed crystals of chalcopyrite and quartz.
Location: Boldut mine, 61 level (350 meters deep), Cavnic, Maramures, Rumania. Scale: 5.5 x 3.5 cm.
© Fabre Minerals

Images:

Ilvaite Quartz

Comments: Black, prismatic ilvaite with quartz.
Location: First Sovietskij mine, Dalnjegorsk, Russia. Scale: 3.5 x 4.5 cm.
© Fabre Minerals

Images:

Quartz

Comments: Crystal druse of transparent quartz crystals.
Location: Hot Springs, Arkansas, USA. Scale: Specimen size 6 cm.
© Dave Barthelmy

Images:

Apatite-(CaF) Quartz

Comments: Purple crystal of fluorapatite on slightly smoky quartz crystals. Former Dr. E.E. David and Houston Museum collections.
Location: Pech, Kunar Province, Nuristan, Afghanistan. Scale: Crystal size 3.0 x 2.1 x 1.7 cm.
© Ed Rosenzweig

Images:

Epistilbite Quartz

Comments: White epistilbite cluster 25 mm across on amethyst quartz crystal matrix.
Location: Sawda, Jalgaon, Maharashtra, India. Scale: 10x8x5 cm.
© John Betts - Fine Minerals

Images:

Quartz

Comments: Slightly smokey quartz overgrown with rose quartz. Note the exceptional transparency of the rose quartz.
Location: Lavra da Ilha, Taquaral, Minas Gerais, Brazil. Scale: 10 cm by 5.2 cm.
© Kevin Ward

Quartz Crystallography

Axial Ratios:

a:c = 1:1.10013

Cell Dimensions:

a = 4.9133, c = 5.4053, Z = 3; V = 113.00 Den(Calc)= 2.65

Crystal System:

Trigonal - Trapezohedral H-M Symbol (3 2) Space Group: P 3₁21,P 3₂21

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

By Intensity(I/I_o): 3.342(1), 4.257(0.22), 1.8179(0.14),

Forms:

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Forms: ( 2 1 1) ( 1 0 1) ( 6 1 1) ( 1 0 0) ( 0 1 1)

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Physical Properties of Quartz

Cleavage:

{0110} Indistinct

Color:

Brown, Colorless, Violet, Gray, Yellow.

Density:

2.6 - 2.65, Average = 2.62

Diaphaneity:

Transparent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Crystalline - Coarse - Occurs as well-formed coarse sized crystals.

Habit:

Crystalline - Fine - Occurs as well-formed fine sized crystals.

Habit:

Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces.

Hardness:

7 - Quartz

Luminescence:

Fluorescent and Triboluminescent, Short UV=yellow-orange, Long UV=yellow-orange.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Quartz

Dichroism (e):

none.

Dichroism (w):

none.

Gladstone-Dale:

CI meas= -0.005 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.207,KPDmeas= 0.209,KC= 0.208
Ncalc = 1.54 - 1.55

Optical Data:

Uniaxial (+), w=1.543-1.545, e=1.552-1.554, bire=0.0090.

Calculated Properties of Quartz

Electron Density:

Bulk Density (Electron Density)=2.65 gm/cc
note: Specific Gravity of Quartz =2.65 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Quartz= 1.80 barns/electron
U=PE_Quartz x rElectron Density= 4.76 barns/cc.

Radioactivity:

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

Quartz Classification

Dana Class:

75.01.03.01 (75)Tectosilicate Si Tetrahedral Frameworks

(75.01)SiO2 with [4] coordinated Si

(75.01.03)Dana Group

75.01.03.01 Quartz SiO2 P 3₁21,P 3₂21 3 2

Strunz Class:

04.DA.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.D - Metal:Oxygen = 1:2 and similar

04.DA -With small cations

04.DA.05 Quartz SiO2 P 3₁21,P 3₂21 3 2

Other Quartz Information

References:

NAME( Sinkankas66) PHYS. PROP.(www.saint-hilaire.ca) OPTIC PROP.(Mason68)

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Quartz

SiO2
Dana No: 75.01.03.01 Strunz No: 04.DA.05
Locality:

Notes:

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