How do you calculate minerals?
How do you calculate minerals?
The basic steps for formula calculation are:
- Divide the weight percentage of each oxide by the formula weight of that oxide.
- Multiply the resulting “mole number” of each oxide by the number of oxygens in the oxide formula.
What is the hardness of glaucophane?
6.0 – 6.5
| Glaucophane | |
|---|---|
| Fracture | Brittle – conchoidal |
| Mohs scale hardness | 6.0 – 6.5 |
| Luster | Vitreous – pearly |
| Streak | Grayish blue |
How do you identify a glaucophane?
Distinguishing Features Glaucophane has length slow, riebeckite length fast. Darkest when c-axis parallel to vibration direction of lower polarizer (blue tourmaline is darkest w/ c-axis perpendicular to vibration direction of polarizer). There is no twinning in glaucophane.
What is the formula of anthophyllite?
The name is derived from the Latin word anthophyllum, meaning clove, an allusion to the most common color of the mineral….
| Anthophyllite | |
|---|---|
| Category | Inosilicates Amphibole |
| Formula (repeating unit) | ☐Mg2Mg5Si8O22(OH)2 |
| Strunz classification | 9.DE.05 |
| Crystal system | Orthorhombic |
How is MG number calculated?
1 milligram (mg) = 1000 micrograms (mcg) or 0.001 grams (g) 1 g = 1000 mg 1 kilogram (kg) = 1000 g 1 kg = 2.2 pound (lb) 1 liter (L) = 1000 milliliters (mL) To convert larger to smaller, multiply by 1000, or move the decimal point three places to the right.
What is the chemical formula for olivine?
Olivine is a magnesium iron silicate with the formula (Mg2+, Fe2+)2SiO4. End members are forsterite (Mg2SiO4) and fayalite (Fe2+2SiO4). Olivine is an abundant mineral in most mafic igneous rocks and the most abundant mineral in the earth’s upper mantle.
How is glaucophane formed?
Glaucophane is formed typically in a highly metamorphic zone known by the geologic term blueschist facies. This facies forms from material caught under subduction zones in mountain belt regions. This material has undergone intense pressure and moderate heat as it was subducted downward toward the mantle.
What is glaucophane stone?
Glaucophane is a sodium magnesium iron aluminium silicate hydroxide mineral, found in blueschist facies subduction zones. Glaucophane crystals are named from the Greek ‘to appear blue’, and fine translucent blue crystals are highly collectable.
Is glaucophane a silicate?
glaucophane, common amphibole mineral, a sodium, magnesium, and aluminum silicate that occurs only in crystalline schists formed from sodium-rich rocks by low-grade metamorphism characteristic of subduction zones.
What is the Diaphaneity of muscovite mica?
| Muscovite | |
|---|---|
| Mohs scale hardness | 2–2.5 parallel to {001} 4 right angle to {001} |
| Luster | Vitreous, silky, pearly |
| Streak | White |
| Diaphaneity | Transparent to translucent |
Where can you find crocidolite?
It is most commonly found in Western Australia, Bolivia and South Africa. Crocidolite asbestos accounted for only four percent of all of the asbestos mined commercially in this country. Its limited use was a result of its lower heat resistance than some other forms of asbestos.
How do you calculate Fe2 from Fe2O3?
The most efficient method is to use Mossbauer spectroscopy which can directly analyse and distinguish Fe2+ and Fe3+. To get FeO to Fe2O3 just multiply FeO by 1.11111 Fe2O3 to FeO is just reverse, divide Fe2O3 by 1.11111 (or multiply by 0.89998).
