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Chemical formula ZnCO3
Strung classification 05.AB.05
Crystal symmetry Trigonal 3 2/m
Unit cell a = 4.6526(7) Å, c = 15.0257(22) Å; Z = 6
Identification
Color White
Crystal habit Uncommon as crystals, typically botryoidal, reniform, spherulitic; stalactitic, earthy, compact massive
Crystal system Trigonal - Hexagonal Scalenohedral
Twinning None observed
Cleavage Perfect on [1011]
Fracture Uneven, sub-conchoidal
Tenacity Brittle
Mohs scale hardness 4.5
Luster Vitreous, may be pearly
Streak White
Diaphaneity Translucent
Specific gravity 4.4 - 4.5
Optical properties Uniaxial (-)
Refractive index nω = 1.842 - 1.850 nε = 1.619 - 1.623
Birefringence δ = 0.223 - 0.227
fluorescence
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General
Category tectosilicate
Chemical formula KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8
Identification
Color pink, white, gray, brown
Crystal system triclinic or monoclinic
Twinning tartan, carlsbad, etc
Cleavage two or three
Fracture along cleavage planes
Mohs scale hardness 6.0-6.5
Luster Vitreous
Streak white
Diaphaneity opaque
Specific gravity 2.55 - 2.76
Birefringence first order
Pleochroism none
Other characteristics exsolution lamella
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Sodium bicarbonate
Sodium bicarbonate or sodium hydrogen carbonate is the chemical compound with the formula NaHCO3. Sodium bicarbonate is a white solid that is crystalline but often appears as a fine powder. Wikipedia
Formula: NaHCO3
Molar mass: 84.007 g/mol
IUPAC ID: Sodium hydrogen carbonate
Density: 2.20 g/cm³
Melting point: 50° C
Soluble in: Water
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Symbol of Element : Ir
Atomic Number : 77
Atomic Mass: 192.217 amu
Melting Point: 2410.0 °C - 2683.15 °K
Boiling Point: 4527.0 °C - 4800.15 °K
Number of Protons/Electrons : 77
Number of Neutrons : 115
Crystal Structure: Cubic
Density @ 293 K: 22.5 g/cm3
Color : whitish-yellow
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