Mineral (Olivin, Piroksen, Kuarsa) - Elvara [PDF]

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SIFAT FISIK KUARSA



Sumber : http://www.webmineral.com/specimens/photos/Quartz.jpg



Deskripsi secara megaskopis Komposisi Kimia Belahan: Warna: Density: Diaphaneity: Fracture: Habit: Habit: Habit: Kekerasan: Luminescence: Kilap: Goresan: Sistem Kristal 3D Atlas Kristal



Genesis Manfaat



SiO2 {0110} Indistinct Cokelat, Colorless, Violet, Abu-Abu, Kuning. 2.6 - 2.65, Rata-Rata = 2.62 Transparent Conchoidal - Fractures berkembang pada material yang brittle dimana memiliki permukaan yang smoothly curving Crystalline - Coarse - Occurs as well-formed coarse sized crystals. Crystalline - Fine - Occurs as well-formed fine sized crystals. Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces. 7 - Kuarsa Fluorescent and Triboluminescent, Short UV=Kuning-orange, Long UV=Kuning-orange. Vitreous (Glassy) white Heksagonal



Terbentuk pada lingkungan batuan beku, batuan sedimen, batuan metamorf, Pegmatit dan hidrotermal  Dipakai dalam industri konstruksi, sebagai flux dalam industri metalurgi  Pembuatan gelas dan keramik



Deskripsi secara Mikroskopis Warna Pleokroisme Indeks bias Relief Bentuk Inklusi Belahan Kembar Zoning Tekstur Warna Interferensi Orientasi Sudut Pemadaman Sumbu Optik Tanda Optik Sudut 2v



Colorless Tidak ada N mineral > n medium v.low + Anhedral Ada / tidak ada Tidak ada Tidak ada Tidak ada Corroded/ myekitic/ intergrowth dengan ortoklas Putih/ agak kuning Orde 1 Length slow Lurus / parallel / 0° 1 + -



SIFAT FISIK OLIVIN



Sumber : http://www.minerals.net/MineralImages/olivine-peridot-st-john-red-sea.jpg



Deskripsi secara Megaskopis Komposisi Kimia Belahan: Warna: Density: Diaphaneity: Fracture: Habit: Kekerasan: Luminescence: Kilap: Goresan: Sistem Kristal 3D Atlas Kristal



Genesis



Manfaat



(Mg,Fe)2SiO4 {001} Good, {010} Distinct Yellowish green, Olive green, Greenish black, Reddish brown. 3.27 - 3.37, Average = 3.32 Transparent - translucent Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. Massive - Granular - Common texture observed in granite and other igneous rock. 6.5-7 - Pyrite-Quartz Non-fluorescent. Vitreous (Glassy) white Orthorhombic



Terbentuk pada lingkungan batuan beku, khususnya dalam lingkungan batuan beku basa dan ultrabasa. Penyusun utama dalam batuan beku ultrabasa, yaitu dunit  Dibuat batupermata  Dibuat pasir refraktori



Warna Pleokroisme Indeks bias Relief Bentuk Inklusi Belahan Kembar Zoning Tekstur Warna Interferensi Orientasi Sudut Pemadaman Sumbu Optik Tanda Optik Sudut 2v



Deskripsi secara Mikroskopis



Colorless Tidak ada N mineral > n medium mod-high+ Anhedral Ada / tidak ada Tidak ada Tidak ada Tidak ada Tidak ada Orde 2 bagian atas Length slow Lurus 2 (+) = olivine forsterit ( - ) = olivine fayalit 70° - 90° 47°-54° = olivine fayalit 85°-90° = olivine forsterit



SIFAT FISIK KELOMPOK PIROKSEN



1. Enstatite



Sumber : http://www.minerals.net/MineralImages/enstatite-mpwa-mpwa-tanzania-thb.jpg



Deskripsi secara Megaskopis Komposisi Kimia Belahan: Warna: Density: Diaphaneity: Fracture: Habit: Kekerasan: Luminescence: Kilap: Goresan: Sistem Kristal 3D Atlas Kristal



Mg2Si2O6 {110} Distinct, {010} Distinct White, Yellowish green, Brown, Greenish white, Gray. 3.1 - 3.3, Average = 3.2 Translucent - opak Brittle - Generally displayed by glasses and most non-metallic minerals Lamellar - Thin laminae producing a lamellar structure Massive - Fibrous - Distinctly fibrous fine-grained forms 5.5 - Knife Blade Non-fluorescent Vitreous - Pearly Gray Orthorhombic



Deskripsi secara mikroskopis Warna Indeks bias Relief Bentuk Belahan Kembar Warna Interferensi Orientasi



Colorless N mineral > n medium tinggi prismatik 1 atau 2 arah Tidak ada Orde 1 (kuning pucat) Length slow



Sudut Pemadaman Tanda Optik



Lurus (+)



Sudut 2v



58° - 80°



2. Diopside



Sumber : http://www.minerals.net/MineralImages/diopside-pitcairn-thb.jpg



Deskripsi mineral secara megaskopis Komposisi Kimia Belahan: Warna: Density: Diaphaneity: Fracture: Habit:



Kekerasan: Luminescence: Kilap: Goresan: Sistem Kristal 3D Atlas Kristal



CaMgSi2O6 {110} Good Blue, Brown, Colorless, Green, Gray. 3.25 - 3.55, Average = 3.4 Transparent - translucent Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. Blocky - Crystal shape tends to be equant (e.g. feldspars) Granular - Generally occurs as anhedral to subhedral crystals in matrix. Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). 6 - Orthoclase Sometimes fluorescent.- red-purple Vitreous (Glassy) white green Monoclinic



Deskripsi secara mikroskopis Warna Indeks bias Pleochroism (x) Pleochroism (y) Relief Bentuk Belahan Kembar Warna Interferensi



Tidak berwarna n mineral > n balsam pale bluish green or dark blue green brownish green or dark blue green. cukup tinggi prismatik pendek 1 arah / 2 arah Umumnya kembar jamak orde kedua bagian atas



Orientasi Sudut Pemadaman Sumbu Optik Tanda Optik Sudut 2v



Length slow c ^ z (-37°) – (-44°) 2 (+) 56° - 64°



3. Hedenbergite



Sumber : http://www.minerals.net/MineralImages/hedenbergite-radiating-seriphos-greece-thb.jpg



Deskripsi mineral secara megaskopis Komposisi Kimia Belahan: Warna: Density: Diaphaneity: Fracture: Habit:



Kekerasan: Luminescence: Kilap: Goresan: Sistem Kristal 3D Atlas Kristal



CaFeSi2O6 Indistinct, Perfect Brownish green, Gray green, Grayish black, Dark green, Black. 3.55 Transparent - translucent to opaque Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. Crystalline - Fine - Occurs as well-formed fine sized crystals. . Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). Granular - Generally occurs as anhedral to subhedral crystals in matrix Lamellar - Thin laminae producing a lamellar structure. 5-6 - Between Apatite and Orthoclase Non-fluorescent. Vitreous - Pearly white green Monoclinic



Deskripsi secara mikroskopis Warna Indeks bias Pleochroism (x) Pleochroism (y) Relief Bentuk Belahan Warna Interferensi Orientasi Sudut Pemadaman Sumbu Optik Tanda Optik Sudut 2v



Tidak berwarna n mineral > n balsam purplish green, pale bluish green, dark bluish green, or deep green. pinkish purple, pale green, or bluish green. Sangat tinggi agregat yang kolumnar 2 arah orde pertama length fast c ^ z c ^ x 42° 2 (+) 56°-72°



4. Augite



Sumber : http://www.minerals.net/MineralImages/augite-yates-mine-otter-lake-thb.jpg



Deskripsi mineral secara megaskopis Komposisi Kimia Belahan: Warna: Density: Diaphaneity: Fracture: Habit:



Kekerasan: Luminescence: Kilap: Goresan: Sistem Kristal 3D Atlas Kristal



(Ca,Na)(Mg,Fe,Al)(Al,Si)2O6 {110} Perfect, {010} Indistinct Brown green, Green, Light brown, Dark brown, Black. 3.2 - 3.6, Average = 3.4 Translucent - opaque Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. Columnar - Forms columns Granular - Generally occurs as anhedral to subhedral crystals in matrix. Massive - Fibrous - Distinctly fibrous fine-grained forms. 5-6.5 Non-fluorescent. Vitreous - Pearly Light green to colorless Monoclinic



Deskripsi secara mikroskopis Warna Indeks bias Pleochroism (x) Pleochroism (y) Relief Bentuk Belahan Warna Interferensi Orientasi Sudut Pemadaman Sumbu Optik Tanda Optik Sudut 2v



Hampir tidak berwarna n mineral > n balsam pale green, pale brownish green, pale bluish green, bluish green, or pale purple brown. pale brownish green, pale greenish brown, pink, or yellowish green. Tinggi prismatik pendek, segi 4 atau segi 8 2 arah orde kedua bagian tengah length fast c ^ x (-36°) – (-45°) 2 (+) 48°-68°



5. Johannsenite



Sumber : http://www.minerals.net/MineralImages/johansennite-broken-hill-australia_t.jpg



Deskripsi mineral secara megaskopis Komposisi Kimia Belahan: Warna: Density: Diaphaneity: Fracture:



CaMnSi2O6 {110} Good Brown, Brownish black, Greenish, Gray, Gray green. 3.56 Translucent - opaque Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. Habit: Acicular - Occurs as needle-like crystals. Massive - Granular - Common texture observed in granite and other igneous rock. Kekerasan: 6 - Orthoclase Luminescence: Non-fluorescent. Kilap: Vitreous (Glassy) Goresan: greenish gray Sistem Kristal Monoclinic Deskripsi secara mikroskopis Tanda Optik Sudut 2v



(+) 2V(Calc)=64°-82° 2V(Meas)=68°-70°



6. Jadeite



Sumber : http://www.minerals.net/mineral/jadeite.aspx



Deskripsi mineral secara megaskopis Komposisi Kimia Belahan: Warna: Density: Diaphaneity: Fracture: Habit:



Kekerasan: Luminescence: Kilap: Goresan: Sistem Kristal 3D Atlas Kristal



NaAlSi2O6 {110} Good Green, White, Pale bluish gray, Grayish green, Pale purple. 3.25 - 3.35, Average = 3.3 Translucent - subtranslucent Tough - Difficult to break apart as shown by fibrous minerals and most metals. Fibrous - Crystals made up of fibers. Granular - Generally occurs as anhedral to subhedral crystals in matrix. Massive - Fibrous - Distinctly fibrous fine-grained forms. 6.5 - Pyrite Non-fluorescent. Vitreous (Glassy) white Monoclinic



Deskripsi secara mikroskopis Warna Indeks bias Pleochroism (x) Pleochroism (y) Relief Bentuk Belahan Warna Interferensi Orientasi Sudut Pemadaman Sumbu Optik Tanda Optik Sudut 2v



colorless n mineral > n balsam colorless or green. colorless or yellowish green. Agak tinggi granular - kolumnar 2 arah orde kedua length slow c ^ z 30° – 44° 2 (+) 2V(Calc)=68°-78° 2V(Meas)=70°-80°



7. Aegirine



Sumber : http://www.minerals.net/MineralImages/aegirine-single-mt-saint-hilaire-t.jpg



Deskripsi mineral secara megaskopis Komposisi Kimia Belahan: Warna: Density: Diaphaneity: Fracture: Habit: Kekerasan: Luminescence: Kilap: Goresan: Sistem Kristal 3D Atlas Kristal



NaAlSi2O6 Distinct Green, Greenish black, Reddish brown, Black. 3.5 - 3.54, Average = 3.52 Subtransparent - translucent to opaque Brittle - Generally displayed by glasses and most non-metallic minerals Acicular - Occurs as needle-like crystals. 6-6.5 - Orthoclase-Pyrite Non-fluorescent. Vitreous - Resinous Yellowish gray Monoclinic



Deskripsi secara mikroskopis Warna Indeks bias Pleochroism (x) Pleochroism (y) Pleochroism (z) Relief Bentuk Belahan Warna Interferensi Orientasi Sudut Pemadaman Sumbu Optik Tanda Optik Sudut 2v



colorless n mineral > n balsam olive green, pale green, pale bluish green, dark grass green, or deep green. light bluish green, yellowish green, grass green, or emerald green. yellowish green, honey yellow, or light yellow. Agak tinggi granular - kolumnar 2 arah orde kedua length fast c ^ x 2° – 10° 2 (-) 2V(Calc)=68-84, 2V(Meas)=60-90



DAFTAR PUSTAKA



http://www.minerals.net/mineral/quartz.aspx http://www.webmineral.com/data/Quartz.shtml#.WAVQkslr1YB http://www.hmag.gla.ac.uk/John/teaching/mintable.htm